The present disclosure relates to electromagnetic shielding paper based on modification of a conductive MOF material and a preparation method thereof, and belongs to the technical field of electromagnetic shielding. The method includes the following steps: putting polyimide fibers into a precursor solution of the conductive MOF material, and reacting to obtain MOF material modified PI fibers; mixing the modified fibers with aramid pulp, and carrying out papermaking, squeezing and drying to obtain a paper-based precursor; generating a conductive polymer (polypyrrole) in situ by using a gas-phase polymerization method, and finally obtaining the electromagnetic shielding paper based on the modification of the conductive MOF material. The electromagnetic shielding paper prepared by the present disclosure not only has good conductivity and electromagnetic shielding performance, but also has good mechanical properties and thermal stability.
D21H 21/14 - Matériaux non fibreux ajoutés à la pâte, caractérisés par leur fonction, leur forme ou leurs propriétésMatériaux d'imprégnation ou de revêtement du papier, caractérisés par leur fonction, leur forme ou leurs propriétés caractérisés par leur fonction ou leurs propriétés dans, ou sur, le papier
2.
Paper-based electromagnetic shielding composite with flame retardant properties and its preparation method and application
Disclosed are a paper-based electromagnetic shielding composite with flame retardant properties and its preparation method and application, belonging to the technical field of electromagnetic shielding. In the present disclosure, PI fibers are modified by polydopamine and grafted with carbon nanotubes, polyimide fiber paper is prepared by a wet papermaking technology, an in-situ synthesis method is used to enable conductive MOFs and polymer PPy to grow on the fiber paper, and finally polyimide resin is sprayed onto the paper to prepare the paper-based electromagnetic shielding composite with flame retardant properties. The method is simple in process without complex synthesis equipment, and solves the problems that polyimide fiber paper is poor in paper forming property and paper mechanical property, and carbon nanotubes are easy to agglomerate in paper and limited in addition amount in the prior art. The paper-based composite has good mechanical property, heat resistance, flame retardancy and electromagnetic shielding performance.
D21H 19/24 - Couches sans pigments appliquées sous une forme autre que la solution aqueuse définie dans le groupe comprenant des composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
Disclosed in the present invention are a paper-based electromagnetic shielding composite material with flame retardance, and a preparation method therefor and the use thereof, which belong to the technical field of electromagnetic shielding. In the present invention, PI fibers are modified with polydopamine and grafted with carbon nanotubes, then polyimide fiber paper is prepared by using a wet paper-making technique, then conductive MOFs and a polymer PPy grow on a surface of the fiber paper by using an in-situ synthesis method, and finally, a polyimide resin is sprayed onto the surface of the paper, so as to obtain a paper-based electromagnetic shielding composite material with flame retardance. The method of the present invention has a simple process, does not need any complex synthesis apparatus, and overcomes the problems in the prior art of polyimide fiber paper being poor in terms of paper forming property and low in terms of the mechanical performance of paper, carbon nanotubes being prone to agglomeration in paper and limited in terms of addition amount, etc. The resulting paper-based composite material has good mechanical performance, heat resistance, flame retardance and electromagnetic shielding performance.
D21H 19/84 - Papier comprenant plusieurs couches sur les deux côtés du substrat
D21H 19/24 - Couches sans pigments appliquées sous une forme autre que la solution aqueuse définie dans le groupe comprenant des composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
H05K 9/00 - Blindage d'appareils ou de composants contre les champs électriques ou magnétiques
D06M 11/74 - Traitement des fibres, fils, filés, tissus ou des articles fibreux faits de ces matières, avec des substances inorganiques ou leurs complexesUn tel traitement combiné avec un traitement mécanique, p. ex. mercerisage avec du carbone ou ses composés avec du carbone ou du graphiteTraitement des fibres, fils, filés, tissus ou des articles fibreux faits de ces matières, avec des substances inorganiques ou leurs complexesUn tel traitement combiné avec un traitement mécanique, p. ex. mercerisage avec du carbone ou ses composés avec des carburesTraitement des fibres, fils, filés, tissus ou des articles fibreux faits de ces matières, avec des substances inorganiques ou leurs complexesUn tel traitement combiné avec un traitement mécanique, p. ex. mercerisage avec du carbone ou ses composés avec des acides graphitiques ou leurs sels
D06M 13/368 - HydroxyalkylaminesLeurs dérivés, p. ex. bases de Kritchevsky
D06M 101/30 - Polymères synthétiques consistant en composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
4.
ELECTROMAGNETIC SHIELDING PAPER BASED ON MODIFICATION OF CONDUCTIVE MOF MATERIAL AND PREPARATION METHOD FOR ELECTROMAGNETIC SHIELDING PAPER
The present invention relates to the technical field of electromagnetic shielding, and relates to an electromagnetic shielding paper based on the modification of a conductive MOF material and a preparation method for the electromagnetic shielding paper. The method of the present invention comprises: putting a polyimide fiber into a precursor solution of a conductive MOF material to react, so as to obtain a MOF material modified PI fiber; mixing the modified fiber with aramid pulp, and papermaking, squeezing, and drying to obtain a paper-based precursor; and using a gas-phase polymerization method to generate a conductive polymer (polypyrrole) in situ, and finally obtaining the electromagnetic shielding paper based on the modification of the conductive MOF material. The electromagnetic shielding paper obtained in the present invention not only has good conductivity and electromagnetic shielding performance, but also has good mechanical performance and thermal stability.
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