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High-thermal-conductivity polypropylene/graphene composite material and preparation method thereof

A composite material and polypropylene technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of poor compatibility between fillers and matrix, imperfect thermal conduction paths, etc., and achieve ultra-high surface heat Conductivity, ease of mass production, and cost reduction

Active Publication Date: 2020-05-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a high thermal conductivity / polypropylene composite material and its preparation method, focusing on improving the problems of poor compatibility between the filler and the matrix and imperfect thermal conduction paths, and breaking through the limitations of thermal conductivity. Increase the limit; at the same time, simplify the preparation process, reduce costs, and make it easy for industrialization

Method used

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  • High-thermal-conductivity polypropylene/graphene composite material and preparation method thereof
  • High-thermal-conductivity polypropylene/graphene composite material and preparation method thereof
  • High-thermal-conductivity polypropylene/graphene composite material and preparation method thereof

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Embodiment 1

[0038] This embodiment is a high thermal conductivity polypropylene / graphene composite material, which is made of the following components in mass parts ratio: graphene oxide: polypropylene = 4:6.

[0039] A high thermal conductivity / polypropylene composite material and a preparation method thereof provided by an embodiment of the present invention comprise the following steps:

[0040] (1) Configure 10mmol / ml Tris buffer solution, adjust the pH to 8.5 with hydrochloric acid, add dopamine hydrochloride and graphene oxide, wherein the concentration of dopamine hydrochloride is 2mg / ml, stir at 60°C for 24h to obtain polydopamine Modified graphene oxide;

[0041] (2) Disperse the polypropylene powder in xylene, heat it under reflux to 130°C, until the polypropylene is completely dissolved, add the polydopamine-functionalized graphene oxide into the solution, wherein the polydopamine-functionalized graphite oxide and polypropylene The mass ratio of the mixture was 4:6, and the re...

Embodiment 2

[0044] The high thermal conductivity polypropylene / graphene composite material and preparation method thereof provided in this embodiment are basically the same as in Example 1, except that:

[0045] (1) Configure 10mmol / ml Tris buffer solution, adjust the pH to 8.5 with hydrochloric acid, add dopamine hydrochloride and graphene oxide, wherein the concentration of dopamine hydrochloride is 2mg / ml, stir at 60°C for 24h to obtain polydopamine modified graphene oxide.

[0046](2) Disperse the polypropylene powder in xylene, heat it under reflux to 130°C, until the polypropylene is completely dissolved, add the polydopamine-functionalized graphene oxide into the solution, wherein the polydopamine-functionalized graphite oxide and polypropylene The mass ratio of the mixture was 1:7, and the reflux stirring was continued at 130° C. for 4 hours to obtain a mixed dispersion. The resulting mixed dispersion was poured into a petri dish, and the solvent was dried in an oven at 150° C. t...

Embodiment 3

[0049] The high thermal conductivity polypropylene / graphene composite material provided by this embodiment and its preparation method are basically the same as those in Embodiment 1 and 2, except that:

[0050] (1) Configure 10mmol / ml Tris buffer solution, adjust the pH to 8.5 with hydrochloric acid, add dopamine hydrochloride and graphene oxide, wherein the concentration of dopamine hydrochloride is 2mg / ml, stir at 60°C for 24h to obtain polydopamine modified graphene oxide.

[0051] (2) Disperse the polypropylene powder in xylene, heat it under reflux to 130°C, until the polypropylene is completely dissolved, add the polydopamine-functionalized graphene oxide into the solution, wherein the polydopamine-functionalized graphite oxide and polypropylene The mass ratio of the mixture was 3:8, and the reflux stirring was continued at 130° C. for 4 hours to obtain a mixed dispersion. The resulting mixed dispersion was poured into a petri dish, and the solvent was dried in an oven ...

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Abstract

The invention discloses a high-thermal-conductivity polypropylene / graphene composite material, which is prepared from the following components in parts by mass: 1-4 parts of graphene oxide and 6-9 parts of polypropylene. The invention further discloses a preparation method of the composite material, which comprises the following steps: modifying graphene oxide with polydopamine to enhance the dispersity of the graphene oxide in a solution; dispersing polypropylene powder into an organic solvent, and after polypropylene is completely dissolved, adding the polydopamine functionalized graphene oxide into the solution to obtain a mixed dispersion liquid; drying the solvent to obtain a polypropylene / graphene film, and stacking and hot-pressing multiple layers of the films to obtain the polypropylene / graphene composite material. The dispersion of the graphene oxide is promoted through polydopamine modified graphene oxide, the height orientation of the graphene oxide in the horizontal direction is realized through a layer-by-layer stacking and hot pressing mode, the interface thermal resistance between graphene oxide sheets is reduced, the in-plane thermal conductivity of the composite material is improved, and the application range of the composite material is widened.

Description

technical field [0001] The invention relates to the technical field of polymer functional materials, in particular to a high thermal conductivity / polypropylene-based thermal conductivity composite material and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, communication circuits, semiconductors and other equipment are gradually becoming smaller and denser. The rapid operation of these high-power devices will generate a lot of heat, and long-term use will not only affect the accuracy of electronic devices, but also cause damage to the equipment and affect its life. Therefore, it is very necessary to study high-performance thermal management devices with good heat dissipation characteristics. [0003] As one of the five general-purpose plastics, polypropylene has many advantages such as light weight, low price, easy processing, impact resistance, and corrosion resistance. But its thermal conductivity is only 0...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K9/08C08K3/04B32B27/32B32B27/20B32B27/06B32B33/00
CPCC08K9/08C08K3/042B32B27/32B32B27/20B32B27/08B32B33/00B32B2307/302B32B2250/242C08L23/12
Inventor 宋娜曹东磊丁鹏施利毅
Owner SHANGHAI UNIV
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