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Semiconductor polymer with composite graphene/carbon black as conductive medium and preparation method

A technology of composite graphene and conductive medium, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of high usage of graphene carbon black, destruction of graphene conjugated structure, and influence on practical application performance, etc. Achieve the effects of reduced content, excellent tensile strength and elongation at break, and excellent electrical conductivity

Active Publication Date: 2019-12-20
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the fact that the existing chemically modified graphene as a filler will destroy the complete conjugated structure of graphene and thus affect the practical application performance, or the existing graphene and carbon black as a composite filler cannot effectively solve the problem. The agglomeration phenomenon of graphene and the defect of high carbon black usage amount provide a kind of composite graphene / carbon black as a conductive medium semiconducting polymer and its preparation method

Method used

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  • Semiconductor polymer with composite graphene/carbon black as conductive medium and preparation method
  • Semiconductor polymer with composite graphene/carbon black as conductive medium and preparation method
  • Semiconductor polymer with composite graphene/carbon black as conductive medium and preparation method

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Embodiment 1

[0066] A composite graphene / carbon black is a semiconducting polymer with a conductive medium, and its raw material components are as follows: EVA69.1%, graphene / polyaniline composite 1.7%, inorganic filler ultrafine modified kaolin 10.4%, carbon black 17.5% % and cross-linking agent DCP 1.3%; among them, the VA content in EVA is 28%;

[0067] Used graphene / polyaniline compound adopts following steps to prepare:

[0068] S1, disperse 10g graphene in 2000mL NMP, ultrasonic 1h, obtain graphene dispersion liquid;

[0069] S2. Add 450 mL of dilute hydrochloric acid solution with a concentration of 1M, 15 g of DBSA, and 15 g of aniline, and stir for 30 min;

[0070] S3. Add 450 mL of 1M dilute hydrochloric acid solution dissolved with 34.2 g of ammonium peroxodisulfate, and react at 0-5° C. for 6 h to obtain a graphene / polyaniline composite solution, which is freeze-dried to obtain final product.

[0071] The composite graphene / carbon black is prepared by the following solution m...

Embodiment 2

[0075] A kind of compound graphene / carbon black is the semiconductor polymer of conductive medium, and its raw material composition is as follows: EVA61.4%, graphene / polyaniline 2.5%, inorganic filler superfine modified kaolin 13.8%, carbon black 19.9%, Cross-linking agent DCP1.2% and lubricant zinc stearate 1.2%; wherein, the VA content in EVA is 28%;

[0076] Used graphene / polyaniline compound adopts following steps to prepare:

[0077] S1, disperse 10g graphene in 2000mL NMP, ultrasonic 1h, obtain graphene dispersion liquid;

[0078] S2. Add 450 mL of dilute hydrochloric acid solution with a concentration of 1M, 15 g of DBSA, and 15 g of aniline, and stir for 30 min;

[0079] S3. Add 450 mL of 1M dilute hydrochloric acid solution dissolved with 34.2 g of ammonium peroxodisulfate, and react at 0-5° C. for 6 h to obtain a graphene / polyaniline composite solution, which is freeze-dried to obtain final product.

[0080] The composite graphene / carbon black is prepared by the fo...

Embodiment 3

[0084] A compound graphene / carbon black is a semiconducting polymer with a conductive medium, and its raw material components are as follows: EVA 70%, graphene / polyaniline composite 3%, inorganic filler ultrafine modified kaolin 11%, carbon black 15% and cross-linking agent DCP 1%; wherein, the VA content in EVA is 28%;

[0085] Used graphene / polyaniline compound adopts following steps to prepare:

[0086] S1, disperse 10g graphene in 2000mL NMP, ultrasonic 1h, obtain graphene dispersion liquid;

[0087] S2. Add 450 mL of dilute hydrochloric acid solution with a concentration of 1M, 15 g of DBSA, and 15 g of aniline, and stir for 30 min;

[0088] S3. Add 450 mL of 1M dilute hydrochloric acid solution dissolved with 34.2 g of ammonium peroxodisulfate, and react at 0-5° C. for 6 h to obtain a graphene / polyaniline composite solution, which is freeze-dried to obtain final product.

[0089] The composite graphene / carbon black is prepared by the following solution method as the se...

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Abstract

The invention discloses a semiconductor polymer taking compound graphene / carbon black as a conductive medium and a preparation method. The semiconductor polymer comprises the following raw materials in percentage by weight: 60-70% of an ethylene-vinyl acetate copolymer, 1-3% of a graphene / polyaniline compound, 10-15% of inorganic filler, 15-20% of carbon black and 1-1.4% of a crosslinking agent. The preparation method comprises the following steps: (1) dispersing the graphene / polyaniline compound in an organic solvent, then mixing the mixture with the inorganic filler, and filtering and drying the mixture to obtain a filler compound; and (2) melting and blending the obtained filler compound with other components or mixing the same in the solvent, then removing the solvent, and performing thermal pressing to obtain the semiconductor polymer. According to the invention, polyaniline is polymerized to the surface of graphene in situ by means of a conjugate action of a benzene ring and graphene, so that the intact conjugate structure of graphene is kept; by compounded use with the inorganic filler and carbon black, the agglomeration problem when the graphene and the polymer is mixed is effectively solved, and meanwhile, the dosage of carbon black is reduced.

Description

technical field [0001] The invention relates to the field of graphene composite materials, in particular to a semiconductor polymer with composite graphene / carbon black as a conductive medium and a preparation method. Background technique [0002] Polymer semiconductive materials have broad application prospects. Taking the electrical field as an example, polymer semiconductive materials in cables are mainly used for stranded conductors and insulation shielding of medium and high voltage cables. In addition to structural conductive polymers, other conductive polymers are prepared by adding conductive fillers to the polymer to prepare conductive materials. Among them, the main filler used is conductive carbon black, and a large amount of carbon black (mass fraction 30%-50%) often needs to be added, but too high carbon black content will affect the mechanical properties of the material. [0003] Graphene is a new carbonaceous nanomaterial with a two-dimensional structure. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/10C08K3/04C08K9/00C08K3/34C08K3/26H01B1/24
CPCC08K3/04C08K3/26C08K3/346C08K9/00C08K9/10C08K13/06C08K2003/265C08K2201/001C08K2201/014H01B1/24C08L23/0853
Inventor 朱铭王一菲姚一一廖文俊曾乐才
Owner SHANGHAI ELECTRICGROUP CORP
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