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Preparation method of graphene nanobelt-poly-p-phenylenediamine/eva composite film

A technology of graphene nanobelts and poly-p-phenylenediamine, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of accelerating the aging rate of EVA films, depositing at the bottom of toluene, and decreasing mechanical properties, achieving Scientific and reasonable preparation method, excellent mechanical properties, and the effect of improving compatibility

Active Publication Date: 2020-11-03
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Like other polymer materials, EVA material itself has low thermal conductivity and high surface resistance. It is easy to generate static charge accumulation during use, which is an important hidden danger of fire, explosion and other safety accidents.
At the same time, the temperature of the EVA film rises during the service process. If the heat cannot be conducted in time, not only will the aging rate of the EVA film be accelerated, but its most basic mechanical properties will also be greatly reduced.
[0005] Although graphene oxide nanoribbons (GONRS) have oxygen-containing functional groups such as carboxyl, hydroxyl, and epoxy groups on the surface, they can be peeled off and uniformly dispersed in water and toluene after ultrasonic treatment, but the dispersion is average. After standing for a while, GONRS will will settle at the bottom of the toluene
In the current literature at home and abroad, the antistatic treatment of EVA is mainly through the addition of a large amount of carbon black and metal oxides, while there are few reports on the growth of nano-conductive polymers by in-situ polymerization on graphene nanobelts.

Method used

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  • Preparation method of graphene nanobelt-poly-p-phenylenediamine/eva composite film
  • Preparation method of graphene nanobelt-poly-p-phenylenediamine/eva composite film
  • Preparation method of graphene nanobelt-poly-p-phenylenediamine/eva composite film

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preparation example Construction

[0027] A preparation method of reduced graphene oxide nanobelt-poly-p-phenylenediamine / EVA composite film, the specific steps are as follows:

[0028] 1) After cold treatment of multi-walled carbon nanotubes (MWCNTS), place them in a low-temperature reaction bath, slowly add concentrated sulfuric acid while stirring, and add potassium permanganate in batches within 3 hours, and control the reaction temperature below 4°C After 0.5h, reheat to 50°C, continue to react for 12h, then add deionized water, stir for 15min, and dropwise add 30% hydrogen peroxide, wash with acid and water until neutral, and freeze-dry to obtain ribbon-shaped graphene oxide nano bring;

[0029] 2) Ultrasonic disperse graphene oxide nanoribbons in deionized water, add p-phenylenediamine monomer and ammonium persulfate initiator in a low-temperature reaction bath, perform low-temperature polymerization reaction below 4°C for 24 hours, then stand for 2 hours, and use deionized Wash with water and absolute ...

Embodiment 1

[0036] 1) Prepare graphene oxide nanoribbons by improving the Hummers method: first cold-treat 1 g of carbon nanotubes, slowly add 45 mL of 98% concentrated sulfuric acid and 5 mL of concentrated phosphoric acid into a low-temperature reaction bath, stir and mix well, and dissolve 7 g of high Add potassium manganate to the mixed acid in batches, then react at low temperature for half an hour, move the reaction system to a water bath and heat to 50°C, continue the reaction for 12 hours, then add 1000mL deionized water to obtain a gray-black graphene oxide nanoribbon suspension, continue After stirring for 15 minutes, 30% hydrogen peroxide was added dropwise to obtain a graphene oxide nanoribbon release solution, and finally pickled with 3% hydrochloric acid solution, then washed to neutrality to obtain a graphene oxide nanoribbon gel, and the graphene oxide nanoribbon gel was obtained. The gel was lyophilized to obtain a fluffy graphene oxide nanoribbon (GONRS) solid;

[0037] ...

Embodiment 2

[0042] In step 4), 0.030g RGONRS-PPDA nanopowder was added, and other condition parameters were the same as in Example 1, and finally a 0.4wt% RGONRS-PPDA / EVA composite film was obtained.

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Abstract

The invention discloses a preparation method of a GNR-PPDA / EVA (graphene nanoribbon-polyp-phenylenediamine / ethylene-vinyl acetate) composite film. GNR-PPDA nano powder is dispersed in an EVA matrix and master batch is prepared; after the master batch and EVA granules are mixed in the mass ratio being 1:1, extrusion granulation, pressing and cutting are performed, and a nano material film is obtained. In the nano material film, the mass content of the GNR-PPDA nano powder in the EVA matrix is 0.2wt%-1.5wt%. The compatibility between GONRs (graphene oxide nanoribbons) and toluene is poor, afterPPDA is polymerized on GO, the GNR-PPDA nano powder can be uniformly distributed in EVA, and good dispersion in the EVA matrix in the rheological process to form the film. Besides, reduced GONRs and PPDA have excellent electrical conductivity and thermal conductivity, and the mechanical performance of the composite film can be greatly improved, so that the mechanical, electrical and thermal conducting properties of the EVA film can be improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to a method for preparing a graphene nanobelt-poly-p-phenylenediamine / EVA composite film. Background technique [0002] Graphene nanoribbons (GNRs) can be regarded as a special strip-shaped graphene material, which is a strip-shaped carbon material in which graphene is cut in a certain direction. Graphene nanoribbons have the same excellent electrical properties, mechanical properties, and thermal conductivity as graphene, and graphene nanoribbons have excellent aspect ratios that graphene does not have. [0003] p-Phenylenediamine is a reducing aromatic amine that is easily oxidized in air. Poly-p-phenylenediamine has a ladder structure with alternating benzene rings and quinones. Its conductivity is similar to that of perniline black, and its conductivity is low, about 6×10 -6 S / cm, doping polymer composites with graphene nanoribbons ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K9/02C08K9/04C08K7/24C08J5/18C08G73/02C09K5/14
CPCC08G73/0266C08J5/18C08J2323/08C08K7/24C08K9/02C08K9/08C08K2201/011C08L2201/04C09K5/14C08L23/0853
Inventor 郑玉婴苏义军周珺
Owner FUZHOU UNIV
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