Method for preparing polymer/reduced graphene oxide composite material

A composite material and graphene technology, applied in the field of fine chemicals, can solve the problems of increasing production cost and time, unfavorable large-scale industrial production, cumbersome solvent post-processing, etc., to avoid post-processing, low material preparation cost, reproducible good sex effect

Active Publication Date: 2017-05-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method of solution blending has achieved the reduction of graphene oxide and the uniform dispersion of reduced graphene oxide in the polymer matrix, it is beneficial to the improvement of the performance of the material, but this method needs to use a large amount of solvent and involves The problem of cumbersome solvent post-processing not only increases the production cost and time, but also is accompanied by the problem of environmental pollution, which is still not conducive to the realization of large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 50g of ethylene-vinyl acetate copolymer (abbreviated as EVA, produced by DuPont, brand 40W), 2.5g of GO (self-made), 2.5g of hydroquinone (abbreviated as HQ, produced by Aladdin Reagent Company, chemically pure) to HAKKE torque In the banbury chamber of the rheometer, it was mixed at 100 °C for 15 min and then taken out to obtain a series of EVA / rGO composite materials.

[0018] The degree of reduction of graphene oxide in the composites was characterized by scanning calorimetry (DSC). If the reduction degree of GO is greater during the processing of composite materials, the oxygen-containing groups on GO in the obtained composite materials are smaller, and the corresponding exothermic enthalpy value in the heating curve of DSC is smaller. Our results found that the reduction enthalpy corresponding to the detachment of oxygen-containing groups on GO on the DSC melting curve is only 1.58 J / g. While other conditions are the same, the same ratio of EVA and GO mixture ...

Embodiment 2

[0020] Add 50 g of ethylene-octene random copolymer (abbreviated as POE, product of Dow), 2.5 g of GO (self-made), and 2.5 g of xylitol (chemically pure reagent) into a HAKKE internal mixer, and knead at 150 ° C for 15 After min, it was taken out and pressed into pellets at 100 °C to obtain a series of POE / rGO composites.

[0021] POE was completely removed by washing with cyclohexane for more than 5 times, and the obtained black powder was tested by DSC and thermogravimetric analysis (TGA). The thermal weight loss ratio of the pellets decreased significantly, indicating that xylitol can realize the reduction of GO during the melt processing of composite materials.

Embodiment 3

[0023] Others are the same as in Example 1, except that the amount of HQ added is 0.5 g, which is mixed in an internal mixer at 150°C for 10 min to obtain a series of EVA / rGO composite materials.

[0024] The obtained composite material was tested by DSC, and the reduction enthalpy of GO in the DSC curve decreased significantly (from 38.7 J / g without adding HQ to 1.53 J / g), and the results showed that HQ had an effect on GO under the processing condition of 150 °C. Obvious restoration effect.

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Abstract

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a method for preparing a polymer/reduced graphene oxide composite material. Polymers and graphene oxide (GO) are used as raw materials, a traditional macromolecular processing and modification technology is utilized, a chemical reduction agent is added, and the GO is directly reduced to reduced graphene oxide (rGO) to certain extent in the processing process, so that the polymer/reduced graphene oxide composite material is obtained in one step. Compared with the conventional method utilizing macromolecules, graphene oxide and the reduction agent to prepare the polymer/reduced graphene oxide composite material by virtue of solution mixing, the method of the invention avoids the use of a great amount of solvent and the complex after-treatment and has the advantages of simple operation, low production cost, convenience in mass production and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a method for preparing a polymer / reduced graphene oxide composite material. Background technique [0002] Graphene itself has excellent mechanical properties and high electrical and thermal conductivity, which is especially suitable for the preparation of various polymer / graphene composite materials, and has received extensive attention in recent years. However, mass production of graphene with a perfect structure is difficult and expensive, and it is difficult to meet the requirements of the mass production of polymer composites. Graphene oxide (GO) is a single-layer or multi-layer substance prepared by oxidation and exfoliation with graphite as raw material. It has the advantages of abundant raw material sources, low price, and easy batch preparation. There are many oxygen-containing functional groups on its surface, which can be Disperses well in certain po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L9/00C08L23/16C08K7/00C08K3/04
CPCC08K3/04C08K7/00C08L23/0853C08L23/0815C08L9/00C08L9/06
Inventor 冯嘉春刘月
Owner FUDAN UNIV
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