Method for preparing graphene-polystyrene composite material by graphene and polystyrene

A composite material, polystyrene technology, applied in the preparation and application of polymer nano-filler composite materials, can solve the problems of high preparation cost, difficult dispersion, uneven dispersion of graphene, etc., and achieve mild conditions, environmental friendliness, and simple process Effect

Pending Publication Date: 2018-07-31
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty of graphene preparation, high price and difficulty in dispersing in the polymer system, the graphene composite materials prepared by the above methods have the problems of high preparation cost, uneven dispersion of graphene and unstable process quality.

Method used

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  • Method for preparing graphene-polystyrene composite material by graphene and polystyrene
  • Method for preparing graphene-polystyrene composite material by graphene and polystyrene
  • Method for preparing graphene-polystyrene composite material by graphene and polystyrene

Examples

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Effect test

Embodiment 1

[0019] Example 1 A method for preparing a graphene-polystyrene composite material from graphite and styrene. In the first step, the ratio of the volume of styrene (mL) to the mass (g) of graphite is 1000:1. After mixing styrene and graphite, they are ball-milled in a star-type ball mill for 6 hours to obtain graphene-containing benzene. Ethylene dispersion;

[0020] In the second step, the above-mentioned dispersion of graphene and styrene is placed in a numerically controlled ultrasonic device for ultrasonic dispersion for 2 hours, and further dispersion is carried out to obtain a graphene / styrene dispersion with good dispersibility;

[0021] In the third step, polyvinyl alcohol and deionized water are added into a three-neck reactor equipped with a stirrer and a reflux condenser at a mass ratio of 1:3. The ratio of the volume of the combined solution (mL) to azobisisobutyronitrile (g) is 80:1, add it into the reactor, stir at a stirring speed of 420 r / min, raise the tempera...

Embodiment 2

[0030] Example 2 A method for preparing a graphene-polystyrene composite material from graphite and styrene. In the first step, the ratio of the volume of styrene (mL) to the mass (g) of graphite is 1000:3. After mixing styrene and graphite, they are ball-milled and peeled off in a planetary ball mill for 12 hours to obtain graphene-containing styrene. Dispersions;

[0031]In the second step, the above-mentioned dispersion of graphene and styrene is placed in a numerically controlled ultrasonic device for ultrasonic dispersion for 4 hours, and further dispersion is carried out to obtain a graphene / styrene dispersion with good dispersibility;

[0032] In the third step, polyvinyl alcohol and deionized water are added into a three-neck reactor equipped with a stirrer and a reflux condenser at a mass ratio of 1:3. The ratio of the volume of the combined solution (mL) to azobisisobutyronitrile (g) is 80:1, add it into the reactor, stir at a stirring speed of 420 r / min, raise the ...

Embodiment 3

[0034] Example 3 A method for preparing a graphene-polystyrene composite material from graphite and styrene. In the first step, the ratio of the volume of styrene (mL) to the mass (g) of graphite is 1000:5. After mixing styrene and graphite, they are ball-milled in a star-type ball mill for 24 hours to obtain graphene-containing benzene. Ethylene dispersion;

[0035] In the second step, the above-mentioned dispersion of graphene and styrene is placed in a numerically controlled ultrasonic device for ultrasonic dispersion for 6 hours, and further dispersion is carried out to obtain a graphene / styrene dispersion with good dispersibility;

[0036] In the third step, polyvinyl alcohol and deionized water are added to a three-neck reactor equipped with a stirrer and a reflux condenser at a mass ratio of 1:3. When the water bath is heated to 70°C, graphene and styrene are dispersed. The ratio of the volume of liquid (mL) to azobisisobutyronitrile (g) is 80:1, add it into the reacto...

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Abstract

The invention discloses a method for preparing a graphene-polystyrene composite material by graphene and polystyrene. The method adopts combination of mechanical-force chemical ultrasonic and an emulsion polymerization method, and adopts graphite as a raw material instead of graphene to prepare a graphene and high-molecular composite material. The method comprises the following steps of: firstly adopting a ball milling method to mechanically peel the graphite in styrene, obtaining styrene dispersion liquid containing graphene, then adopting an ultrasonic method to further disperse the dispersion liquid, and finally carrying out emulsion polymerization reaction; filtering, carrying out vacuum drying and obtaining a target material. The method disclosed by the invention has the beneficial effects that since the graphite is adopted as the raw material, the key technical difficulties in the existing preparation technology are solved, and the method is a new method which is environment-friendly, pollution-free and environmentally-protective, is mild in condition and can be used for large-scale preparation of functionalized polystyrene / graphene nano composite material; with the thermal conductivity coefficient being 0.2508W / (m DEG C) and the thermal decomposition temperature being 360 DEG C, the prepared graphene-polystyrene composite material can be used as a thermal-conductive composite material.

Description

technical field [0001] The invention belongs to the field of preparation and application of polymer nano filler composite materials, and relates to a method for preparing graphene-polystyrene composite materials from graphite and styrene. Background technique [0002] Traditional heat-conducting plastics are mainly filled with high-heat-conducting metal or inorganic filler particles to uniformly fill the polymer matrix material. When the amount of filler reaches a certain level, the filler forms a chain-like and network-like shape in the system, that is, forms a heat-conducting network chain. When the orientation direction of these heat conduction network chains is parallel to the heat flow direction, the thermal conductivity of the system will be greatly improved. [0003] Graphene is a new type of carbon nanomaterial with a single-layer sheet structure composed of carbon atoms, with a thickness of only 0.35nm. Due to its large specific surface area, good thermal and chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K3/04C08F112/08
CPCC08F112/08C08K3/042C08K2201/011C08L25/06
Inventor 张龙金文涵
Owner CHANGCHUN UNIV OF TECH
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