A Nafion film/Ti3C2Tx/sulfur composite material. The composite material is composed of sulfur, sheet Ti3C2Tx, and a Nafion film; an inner layer is sulfur and a Ti3C2Tx composite material, and an outer layer is the Nafion film with which the sulfur and the Ti3C2Tx composite material are coated, wherein the mass ratio of the Nafion film to Ti3C2Tx to sulfur is 0.05-0.2:0.05-0.2:1. The Nafion film of the coating layer of the composite material can apply physical protection to a sulfur-based material, and limits polysulfide generated in the process of charging and discharging to be within the Nafion film, thereby reducing a shuttle effect; the composite material simultaneously limits the movement of the polysulfide from the two aspects of physical limit and chemical adsorption, and effectively prolongs the service life of a lithium-sulfur battery.
Provided is an improved preparation method for graphene oxide. The method comprises pre-oxidation, washing and drying, oxidization, termination reaction, removal of potassium permanganate, washing and concentration, and ultrasonic dialysis, thereby obtaining a graphene oxide solution. The graphene oxide prepared using the method combines the advantages of relatively high electrical conductivity and a relatively large specific surface area of graphene as well as good mechanical properties of cellulose such as CEC and CEHEC.
A preparation method for a graphene/CEC composite film, comprising: dispersing graphene oxide in a DMF solution, and then performing ultrasonic dispersion until the graphene oxide is completely molten so as to obtain a graphene oxide solution; dissolving prepared CEC in the DMF, slowly pouring the CEC solution into the graphene oxide solution after the CEC is completely dissolved, and stirring the mixed solution with a magneton stirrer; placing a composite film in a vacuum drying cabinet for drying; and reducing, after a film is formed, the composite film, selecting a fixed area of the film, and coating two sides of the fixed area with a silver adhesive to form an electrode to test dielectric properties.
Provided is a method for preparing Fe2O3 having a hollow structure based on microwave synthesis. The method comprises: adding FeCl3·6H2O and urea to a three-necked flask and adding ethylene glycol into the three-necked flask; adding a magnetic rotor to the three-necked flask, fixing the three-necked flask on a magnetic stirrer, and stirring to completely dissolve FeCl3·6H2O and urea; heating the mixed solution and performing a constant temperature reaction in a microwave reactor; after the reaction is ended, naturally cooling to a room temperature, centrifugalizing the obtained precipitate, and repeatedly washing the precipitate with absolute ethyl alcohol and distilled water; and vacuum-drying the washed precipitate, then heating at a uniform speed, naturally cooling to the room temperature, and finally obtaining a dry and loose red product. As an electrode material, the prepared Fe2O3 having a hollow structure has good cycle stability. Gathered microspheres having a core-shell structure have a large specific surface area, facilitating ion penetration, thereby ensuring that the material has good electrochemical performance.
The present invention provides a Ti3C2Tx/SBA-15 type hierarchical sulfur-carbon composite material. The composite material consists of a carbon material having a spherical hierarchical structure, and Ti3C2Tx and elemental sulfur dispersed in the carbon material having the hierarchical structure; elemental sulfur and Ti3C2Tx are coated with the hierarchical carbon material at an outer layer, wherein the mass ratio of Ti3C2Tx to carbon to sulfur is 0.1-0.3:0.1-0.3:1; the hierarchical carbon material consists of a mesoporous carbon material and a microporous carbon material that is formed by carbonizing an organic material with which the outer layer is coated. T of Ti3C2Tx in the composite material is an -F group or an -OH group; the group, as well as oxide on the surface of graphene oxide, is a strong polar group, and has a strong chemical adsorption effect on polysulfide formed in the process of charging and discharging; moreover, the micropores of the porous carbon material also have a physical adsorption effect on the polysulfide. By means of the physical adsorption capability and the chemical adsorption capability, movement of polysulfide can be effectively prevented, occurrences of shuttle effect can be reduced, and the service life of a lithium-sulfur battery is prolonged.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/583 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
6.
PREPARATION METHOD FOR TI3C2TX/SULFUR-CARBON COMPOSITE MATERIAL
A preparation method for a Ti3C2Tx/sulfur-carbon composite material. The composite material is composed of a carbon material having a spherical porous structure, and Ti3C2Tx and elemental sulfur dispersed in the carbon material having the porous structure; the elemental sulfur and Ti3C2Tx are coated with the porous carbon material at an outer layer, wherein the mass ratio of Ti3C2Tx to carbon to sulfur is 0.1-0.3:0.1-0.3:1. T of Ti3C2Tx in the composite material is an -F group or an -OH group; the composite material can form strong chemical adsorption on polysulfide formed in the process of charging and discharging; moreover, the micropores of the porous carbon material can also apply physical adsorption to the polysulfide; based on the physical adsorption and chemical adsorption capabilities, the movement of the polysulfide can be effectively prevented, the occurrence of a shuttle effect is reduced, and the service life of a lithium-sulfur battery is prolonged.
A polyanthraquinone thioether/Ti3C2Tx/sulfur composite material. The composite material is composed of sulfur, sheet Ti3C2Tx, and polyanthraquinone thioether; an inner layer is sulfur and a Ti3C2Tx composite material, and an outer layer is polyanthraquinone thioether with which the sulfur and the Ti3C2Tx composite material are coated, wherein the mass ratio of polyanthraquinone thioether to Ti3C2Tx to sulfur is 0.05-0.2:0.05-0.2:1. The polyanthraquinone thioether of the coating layer of the composite material can apply physical protection to a sulfur-based material, and limits polysulfide generated in the process of charging and discharging to be within the polyanthraquinone thioether, thereby reducing a shuttle effect; the composite material simultaneously limits the movement of the polysulfide from the two aspects of physical limit and chemical adsorption, and effectively prolongs the service life of a lithium-sulfur battery.
The present invention provides a preparation method for a graphene/CEHEC composite material, comprising: alkalization of HEC: taking an appropriate amount of HEC, adding a mixed liquid of isopropanol and ethanol, and adding sodium hydroxide solutions of different concentrations, then performing stirring, dissolving and alkalization; dissolving graphene oxide into a DMF solution, and ultrasonically dispersing the solution; etherification of the HEC: taking out the mixture and squeezing same with a suction filtration device, and adding a mixed liquid of acrylonitrile and dichloromethane; first stirring after adding the mixed liquid, then heating by stages, and pouring a graphene oxide solution; and precipitation: slowly pouring the mixture into ethanol for precipitation, then washing the precipitate with ethanol or deionized water, and drying. By means of the preparation method for a graphene/CEHEC composite material provided by the present invention, the prepared graphene/CEHEC composite material has higher electrical conductivity than ordinary materials, and significantly improved dielectric properties.
C08B 11/193 - Mixed ethers, i.e. ethers with two or more different etherifying groups
C08B 11/155 - Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with nitrogen-containing groups with cyano groups, e.g. cyanoalkyl ethers
9.
METHOD FOR PREPARING FE2O3 HAVING HOLLOW STRUCTURE BASED ON HYDROTHERMAL SYNTHESIS
Provided is a method for preparing Fe2O3 having a hollow structure based on hydrothermal synthesis. The method comprises: weighing FeCl3·6H2O and urea, pouring ethylene glycol into a container holding FeCl3·6H2O and urea, adding a magnetic rotor to the container, fixing the container on a magnetic stirrer, and stirring to completely dissolve FeCl3·6H2O and urea; transferring the mixed solution into a reactor and reacting in a drying oven; after the reaction is ended and the reactor is naturally cooled, centrifugalizing the obtained precipitate, and repeatedly washing the precipitate with absolute ethyl alcohol and distilled water; drying the washed precipitate to obtain a yellow-green product, i.e., FeOOH; and heating the product, and then naturally cooling same to obtain a dry and loose red product, i.e., Fe2O3. As a negative electrode material of a lithium ion battery, the prepared Fe2O3 having a hollow structure has a high capacity, good cycle performance, strong magnetism, and a good application prospect in terms of a magnetic drug carrier, a microreactor, etc.
Provided is a method for preparing Fe2O3 having a hollow structure based on oil bath synthesis. The method comprises: adding FeCl3·6H2O and urea to a three-necked flask and adding ethylene glycol into the three-necked flask; adding a magnetic rotor to the three-necked flask, fixing the three-necked flask on a magnetic stirrer, and stirring to completely dissolve FeCl3·6H2O and urea; heating the mixed solution and performing a constant temperature reaction; after the reaction is ended, naturally cooling to a room temperature, centrifugalizing the obtained precipitate, and repeatedly washing the precipitate with absolute ethyl alcohol and distilled water; and vacuum-drying the washed precipitate, then placing the dried precursor into a muffle furnace, naturally cooling to the room temperature, and finally obtaining a dry and loose red product. The Fe2O3 electrode material having a hollow structure prepared by the method has little capacity attenuation, high magnetization intensity, and a small coercive force, and can be widely applied to magnetic storage devices.
The present invention provides a preparation method for a cyanoethyl cellulose derivative. The method comprises: alkalization of a cellulose glyceryl ether, comprising weighing of a cellulose glyceryl ether, adding a mixture of isopropanol and ethanol, then adding sodium hydroxide solutions of different concentrations, and stirring the mixture; cyanoethylation of the cellulose glyceryl ether, comprising subjecting the mixture to suction filtration and squeezing to crush and disperse the mixture into small particulate matter, adding a mixture of acrylonitrile and dichloromethane, and slowly adding the wet material; stirring the solution, then raising the temperature in stages for reaction, and terminating the reaction with a corresponding amount of acetic acid after the end of etherification; precipitating the obtained mixture, and washing the mixture with ethanol or deionized water and drying the mixture; measuring the molar substitution of the cellulose glyceryl ether. The preparation method for the cyanoethyl cellulose derivative provided by the present invention has good thermal stability and can be used for high temperature capacitors, and the product has a significantly improved dielectric properties, better flexibility, improved ductility, and good mechanical properties.
C08B 11/155 - Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with nitrogen-containing groups with cyano groups, e.g. cyanoalkyl ethers
12.
PREPARATION METHOD OF COMPOSITE MATERIAL HAVING NITROGEN-DOPED GRAPHENE/MANGANESE DIOXIDE/HOLLOW SULFUR PARTICLES
Provided in the present invention is a preparation method of a composite material having nitrogen-doped graphene/manganese dioxide/hollow sulfur particles, the method comprising the following steps: step (1), adding sulfur powder into carbon disulfide, and stirring and dissolving the same to obtain a homogeneous solution; step (2), ball milling high purity nickel powder by means of a high energy ball mill, adding the ball-milled product into the aforementioned solution, stirring the same to form a homogeneous suspension, performing mechanical stirring, and spraying and drying to obtain sulfur-coated spherical particles; step (3), adding the spherical particles into a solution added with iron chloride, stirring to react, and rinsing with water and filtering; and step (4), adding the filtered-out precipitate into a solution containing manganese chloride and potassium permanganate, stirring to form a homogeneous suspension, heating and stirring to react, and performing centrifugation and water rinsing to obtain sulfur particles coated with manganese dioxide. The composite material is designed to have a hollow structure to reserve space for volume expansion of the sulfur material during a charging or discharging process, thus effectively improving electrochemical properties.
A preparation method of a composite material having nitrogen-doped graphene/copper sulfide/hollow sulfur particles, the method comprising the following steps: step (1), adding sulfur powder into carbon disulfide, and stirring and dissolving the same to obtain a homogeneous solution; step (2), ball milling high purity nickel powder by means of a high energy ball mill, adding the ball-milled product into the solution, stirring the same to form a homogeneous suspension, performing mechanical stirring, and spraying and drying to obtain sulfur-coated spherical particles; step (3), adding the spherical particles into a solution added with iron chloride, stirring to react, and rinsing with water and filtering; and step (4), adding the filtered-out precipitate into a solution containing copper chloride, thioacetamide, and a surfactant, stirring to form a homogeneous suspension, heating and stirring to react, and performing centrifugation and water rinsing to obtain sulfur particles coated with copper sulfide. The composite material is designed to have a hollow structure to reserve space for volume expansion of the sulfur material during a charging or discharging process, thus effectively improving electrochemical properties.
Provided is a Ti3C2Tx/graphene oxide/Celgard composite separator, comprising: a Celgard separator; and a Ti3C2Tx/graphene oxide layer formed on a surface thereof. The Ti3C2Tx/graphene oxide layer has a thickness of 1-10μm. In the Ti3C2Tx/graphene oxide layer, a mass ratio of Ti3C2Tx to graphene oxide is 1:0.2-1. For the Ti3C2Tx in the Ti3C2Tx/graphene oxide layer, T represents an -F group or an -OH group, which along with oxygen on a surface of the graphene oxide are groups with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
The present invention provides a synthetic preparation method for cyanoethyl hydroxyethyl cellulose. The method comprises: alkalization of hydroxyethyl cellulose, comprising weighing a quantity of hydroxyethyl cellulose, adding a mixture of isopropanol and ethanol, then adding sodium hydroxide solutions of different concentrations, and stirring the mixture; cyanoethylation of the hydroxyethyl cellulose, comprising subjecting the mixture to suction filtration and squeezing to crush and disperse the mixture into small particulate matter, adding a mixture of acrylonitrile and dichloromethane, and slowly adding the wet material; stirring the solution, then raising the temperature in stages for reaction, and terminating the reaction with a corresponding amount of acetic acid after the completion of etherification; precipitating the obtained mixture, and washing the mixture with ethanol or deionized water and drying the mixture; and measuring the molar substitution of cyanoethyl hydroxyethyl cellulose. The cyanoethyl hydroxyethyl cellulose prepared by the present invention has a desirable toughness, an increased cyanoethyl content, an increased tensile strength, a reduced elongation at break rate, enhanced rigidity, and a high dielectric constant.
C08B 11/155 - Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with nitrogen-containing groups with cyano groups, e.g. cyanoalkyl ethers
The present invention provides a preparation method for cyanoethyl cellulose (CEC). The method comprises: step 1, alkalization of cellulose, comprising weighing of cellulose, adding a mixture of isopropanol and ethanol, then adding sodium hydroxide solutions of different concentrations, and stirring the mixture; step 2, cyanoethylation of the cellulose, comprising subjecting the mixture of step 1 to suction filtration and squeezing, adding a mixture of acrylonitrile and dichloromethane, stirring the mixture, then raising the temperature in stages for reaction, and terminating the reaction with a corresponding amount of acetic acid after the completion of etherification; and step 3, precipitating the mixture obtained in step 2, and washing the mixture with ethanol or deionized water and drying the mixture. Compared with the prior art, the preparation method for cyanoethyl cellulose provided by the present invention has a simple preparation process and an easily controllable reaction time, and the CEC prepared thereby has a high tensile strength, low elongation at break, no yield point, and excellent rigidity.
C08B 11/155 - Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with nitrogen-containing groups with cyano groups, e.g. cyanoalkyl ethers
17.
PREPARATION METHOD OF COMPOSITE MATERIAL HAVING NITROGEN-DOPED GRAPHENE/ZINC HYDROXIDE/HOLLOW SULFUR PARTICLES
Provided in the present invention is a preparation method of a composite material having nitrogen-doped graphene/zinc hydroxide/hollow sulfur particles, the method comprising the following steps: step (1), adding sulfur powder into carbon disulfide, and stirring and dissolving the same to obtain a homogeneous solution; step (2), ball milling high purity nickel powder by means of a high energy ball mill, adding the ball-milled product into the solution, stirring the same to form a homogeneous suspension, performing mechanical stirring, and spraying and drying to obtain sulfur-coated spherical particles; step (3), adding the spherical particles into a solution added with iron chloride, stirring to react, and rinsing with water and filtering; and step (4), adding the filtered-out precipitate into a solution containing zinc chloride, urea, and a surfactant, stirring to form a homogeneous suspension, heating and stirring to react, and performing centrifugation and water rinsing to obtain sulfur particles coated with zinc hydroxide. The composite material is designed to have a hollow structure to reserve space for volume expansion of the sulfur material during a charging or discharging process, thus effectively improving electrochemical properties.
An electrode manufacturing method for a supercapacitor, the method comprising: synthesizing iron oxide, employing synthesized α-FeOOH and α-Fe2O3 nano-materials as an electrode active material, selecting a conductive agent and binder to acquire a suspension, coating the suspension on a washed and cleaned nickel foam electrode, removing the solvent and water, and performing compaction to enable contact tightness between the powder material and the nickel foam electrode to form an electrode of a supercapacitor. The electrode manufacturing method of a supercapacitor is employed to manufacture supercapacitor electrodes that have superior crystallinity, excellent crystal properties, and regularity of a crystal structure arrangement, and are proven to have superior conductivity by experiments.
H01G 11/24 - Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosityElectrodes characterised by the structural features of powders or particles used therefor
19.
METHOD OF MANUFACTURING LITHIUM-ION BATTERY ELECTRODE AND ASSEMBLING BATTERY
Provided in the present invention are a method of manufacturing a lithium-ion battery electrode, and assembling a battery. The method comprises: performing microwave synthesis, employing a synthesized Fe2O3 nano-material as an electrode active material, selecting a conductive agent and binder, adding N-methylpyrrolidone as an solvent proportionally, and acquiring a paste by means of grinding and mixing; coating the paste on a copper foil of a current collector, vacuum drying, removing the solvent and moisture, and performing compaction to enable contact tightness between an electrode and a powder material; and performing stamping to obtain a negative electrode disk, and drying in a vacuum drying chamber in preparation for battery assembly. The method of manufacturing a lithium-ion battery electrode and assembling a battery provided by the present invention provides a superior capacitive characteristic and conductive property to a manufactured electrode of a lithium-ion battery. In addition, the method improves a utilization rate of an electrode material, thus improving a capacity of the material.
A method for preparing a composite separator for a lithium-sulfur battery comprises the following steps: Step (1): adding an MoS2 powder to a solution of n-butyllithium in hexane, stirring and reacting, filtering, rinsing with cyclohexane, and rinsing with water to obtain an MoS2 sheet; and Step (2) adding graphene oxide and the MoS2 sheet to water, performing ultrasonic dispersion to form a suspension, pouring the suspension to a filter flask provided with a Celgard separator and a filter paper for filtering, and removing the filter paper after drying to obtain a composite separator for a lithium-sulfur battery. In an MoS2 sheet/ graphene oxide layer, the MoS2 sheet exhibits high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided is a Ti3C2Tx/Nafion/Celgard composite separator, comprising: a Celgard separator; and a Ti3C2Tx/ Nafion layer formed on a surface thereof. The Ti3C2Tx/Nafion layer has a thickness of 1-10μm. In the Ti3C2Tx/Nafion layer, a mass ratio of Ti3C2Tx to Nafion is 0.05-0.5:1. For the Ti3C2Tx in the Ti3C2Tx/Nafion layer, T represents an -F group or an -OH group, which along with an -F group of a Nafion film are groups with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided is a Ti3C2Tx/PVDF/Celgard composite separator, comprising: a commercial Celgard separator; and a Ti3C2Tx/PVDF layer formed on a surface thereof. The Ti3C2Tx/PVDF layer has a thickness of 1-10μm. In the Ti3C2Tx/PVDF layer, a mass ratio of Ti3C2Tx to PVDF is 1:0.01-0.1. For Ti3C2Tx, T represents an -F group or an -OH group, which are groups with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided is a method for preparing a fluorinated graphene oxide/Celgard composite separator comprising a commercial Celgard separator and a fluorinated graphene oxide layer. The fluorinated graphene oxide layer has a thickness of 1-10μm. The fluorinated graphene oxide layer has a mass fraction of 1%-20% of oxygen and a mass fraction of 1%-20% of fluorine. In the fluorinated graphene oxide layer, an -F group or an oxygen group is a group with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided is a polyacrylonitrile/fluorinated graphene oxide/Celgard composite separator, comprising: a commercial Celgard separator; and a polyacrylonitrile/fluorinated graphene oxide layer formed on a surface thereof. The polyacrylonitrile/fluorinated graphene oxide layer has a thickness of 1-10μm. In the polyacrylonitrile/fluorinated graphene oxide layer, a mass ratio of polyacrylonitrile to fluorinated graphene oxide is 0.2-1:1. The fluorinated graphene oxide has a mass fraction of 1%-20% of oxygen and a mass fraction of 1%-20% of fluorine. In the polyacrylonitrile/fluorinated graphene oxide layer, a nitrile group of the polyacrylonitrile and oxygen and fluorine on a surface of the fluorinated graphene oxide are groups with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided is a method for preparing a composite separator for a lithium-sulfur battery, comprising: a commercial Celgard separator; and a polyacrylonitrile/graphene oxide layer formed on a surface thereof. The polyacrylonitrile/graphene oxide layer has a thickness of 1-10μm. In the polyacrylonitrile/graphene oxide layer, a mass ratio of polyacrylonitrile to graphene oxide is 0.2-1:1. In the polyacrylonitrile/graphene oxide layer, a nitrile group of the polyacrylonitrile and oxygen on a surface of the graphene oxide are groups with strong polarity exhibiting high chemical adsorption with respect to polysulfide formed in a charging/discharging process, thereby effectively preventing polysulfide from penetrating the separator to reach a negative electrode, reducing shuttle effect, and increasing service life of a lithium-sulfur battery.
Provided are a hollow bio-ceramic ball and a manufacturing method and a forming device thereof. The hollow bio-ceramic ball comprises a ceramic shell having a central shaft therein. A plurality of fins are arranged at the central shaft. The ceramic shell also has a plurality of through holes. The forming device comprises a support and a spherical forming cavity formed by two hemispherical shell molds. A fixing ring is provided at where the two hemispherical shell molds are connected. The tip of an outer surface of the hemispherical shell mold is connected to a supporting plate. The supporting plate is connected and fixed to a main shaft. The main shaft is located at an axis of the spherical forming cavity formed by the hemispherical shell molds. The main shaft is driven by a driving device. The main shaft is installed at the support by means of a bearing.
A stirring vibration cleaner comprises a base (1). The top of the base (1) is provided with a support (3). A hemispherical sink (2) is mounted in the base (1). A hemispherical sieve (12) is disposed in the sink (2). An opening of the sieve (12) is provided with a steel ring (10). The steel ring (10) is suspended on the support (3) by springs. The sieve (12) and the sink (2) have the same spherical center, and there is a gap between the sieve (12) and the sink (2). A cam (9) is further mounted on the base (1). The cam (9) is in contact with an outer side wall of the steel ring (10). A motor (4) is further mounted on the support (3). The motor (4) is connected to a stirring rod (5). The stirring rod (5) is located in the sieve (12). By means of vibration and stirring, the above-described structure removes debris and impurities from workpiece surfaces, and filters the debris and impurities out via holes of the sieve. The stirring vibration cleaner of the invention has high efficiency, can effectively remove workpieces having cavities, and saves water.
B08B 3/10 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
28.
DEVICE FOR CLEARING EMERGENT PLANTS IN ARTIFICIAL WETLAND
Disclosed is a device for clearing emergent plants in an artificial wetland. The device comprises a floating plate (1), the floating plate (1) being a plane having a smooth bottom surface. A cutting blade (3) is mounted on the front end of the floating plate (1), and a shaft (4) of the cutting blade (3) is vertically mounted. The shaft (4) is mounted in a casing (9), the casing (9) is mounted above the floating plate (1), the front end of the casing (9) has an arc-shaped surface, and a gap is reserved between the lower surface of the casing (9) and the floating plate (1). The cutting blade (3) is mounted between the casing (9) and the floating plate (1). A cable hole is further fixed at the front end of the floating plate (1), the cable hole is used to fix a cable, the cable is connected to a power device, and the power device pulls the floating plate (1) to move on the wetland. The device is simple and safe to operate and does not require personnel to physically enter the water.
The present invention provides a preparation method for a Fe3O4/MWCNTs-paraffin composite material. The preparation method comprises the following steps: step 1, putting a CNT and an acid liquid into a three-opening flask, putting the three-opening flask into an oil bath pan and performing mechanical stirring, performing suction filtration, and performing cleaning by using a great amount of deionized water until the filtrate approximates to a neutral state, so as to obtain an acidified MWCNTs suspension; step 2, adding a functionalized carbon nanotube into a beaker in which the deionized water is contained, and performing ultrasonic treatment to form a stable carbon nanotube suspension, so as to obtain an Fe3O4/MWCNTs heterogeneous structure; and step 3, weighing and putting Fe3O4/MWCNTs and paraffin in the beaker; adding ethyl ether, performing ultrasonic dispersion; after the ethyl ether is completely evaporated, cooling the ethyl ether to a room temperature; putting a sample into a mold; pressing the sample into a cylinder. The preparation method for a Fe3O4/MWCNTs-paraffin composite material, provided in the present invention, has a simple and convenient process, and the prepared Fe3O4/MWCNTs-paraffin composite material has high stability, good coating properties, good crystallinity and very good dielectric properties.
The present invention provides a preparation method for a PANI/Fe3O4/MWCNTs-paraffin composite material. The method comprises: putting a CNT and an acid liquid into a three-opening flask; putting the three-opening flask into an oil bath pan and performing mechanical stirring for hours, and performing suction filtration; and putting an obtained sample into a sample baking oven, so as to obtain an acidified MWCNTs suspension; adding a functionalized carbon nanotube into a beaker, and performing ultrasonic treatment to form a stable carbon nanotube suspension; adding 20 ml of 157 mg (0.4 mmol) (NH4)2FeSO4.6H2O and 386 mg (0.8 mmol) NH4Fe(SO4)2.12H2O to continue to perform ultrasonic treatment, so as to obtain an Fe3O4/MWCNTs heterogeneous structure; weighing and putting 0.02 g of Fe3O4/MWCNTs and 0.08 g of paraffin into a 100 ml beaker; adding 20 ml of ethyl ether; performing ultrasonic dispersion; after the ethyl ether is completely evaporated, cooling the mixture to a room temperature; putting the sample into a mold; pressing the sample into a cylinder. Compared with the prior art, the PANI/Fe3O4/MWCNTs-paraffin material prepared in the present invention has uniform surface coating, an orderly structure and very good dielectric properties.
The present invention provides a preparation method for a PANI/MWCNTs composite material. The method comprises the following steps: putting a CNT and an acid liquid into a three-opening flask; putting the three-opening flask into an oil bath pan and performing mechanical stirring, and performing suction filtration; performing cleaning by using a great amount of deionized water until the filtrate approximates to a neutral state; putting a filtered sample into a baking oven to obtain an acidified MWCNTs suspension; preparing a diluted hydrochloric acid solution and a hydrochloric acid solution having a certain solubility in advance; weighing MWCNTs; adding the MWCNTs into the hydrochloric acid solution; performing ultrasonic treatment; obtaining a PANI/MWCNTs heterogeneous structure; weighing and putting 0.02 g of PANI/MWCNTs and 0.08 g of paraffin into a 100 ml beaker; adding 20 ml of ethyl ether; performing ultrasonic dispersion; after the ethyl ether is completely evaporated, cooling the ethyl ether to a room temperature; putting the sample into a mold; and pressing the sample into a cylinder. Compared with the prior art, the PANI/MWCNTs composite material prepared in the present invention has high stability, good coating properties, good crystallinity and very good dielectric properties.
A preparation method for a ZnO/MWCNTs composite material comprises: putting a CNT and an acid liquid into a beaker, performing ultrasonic suction filtration, performing cleaning by using a great amount of deionized water until a filtrate approximates to a neutral state; putting an obtained sample into a baking oven for baking, so as to obtain a functionalized carbon nanotube; preparing ultrasonic treatment on the functionalized carbon nanotube, Zn(CH3COO)2.2H2O and DMF, and putting them into an oil bath pan for heating, and placing a plastic wrap on an opening of the beaker during the reaction and keeping a small hole, performing magnetic stirring, performing cleaning for several times by using deionized water and absolute ethyl alcohol, until the filtrate is in a neutral state; putting powder obtained after the reaction into the baking oven for baking, so as to obtain ZnO/MWCNTs powder; weighting and adding the ZnO/MWCNTs and paraffin into the beaker, adding ethyl ether and performing ultrasonic dispersion; after the ethyl ether is completely evaporated, cooling the ethyl ether to a room temperature; putting the sample into a mold; and pressing the sample into a cylinder. The ZnO/MWCNTs composite material prepared by means of the method has high stability and has a good interface bonding state between the carbon nanotube and zinc oxide.
patents
