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Method for quickly functionalizing graphene with covalent polystyrene

A technology of polystyrene and graphene, which is applied in the treatment of dyed low-molecular organic compounds, dyed high-molecular organic compounds, fibrous fillers, etc., can solve the problems of poor compatibility between graphene and organic polymers, and achieve monomer Wide application range, extremely applicable surface for a single unit, and simple steps

Inactive Publication Date: 2015-03-11
HUNAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a mild and efficient method to covalently bond polystyrene to the surface of graphene, realize functional modification to it, and solve the problems of poor compatibility between graphene and organic polymers

Method used

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  • Method for quickly functionalizing graphene with covalent polystyrene
  • Method for quickly functionalizing graphene with covalent polystyrene
  • Method for quickly functionalizing graphene with covalent polystyrene

Examples

Experimental program
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Embodiment 1

[0028] A method for covalently functionalizing graphene with polystyrene quickly, the specific steps are as follows:

[0029] 1) Preparation of graphene oxide: graphene oxide prepared by Hummers method: add 1.0 g of dried flake graphite, 1.2 g of potassium nitrate, and 46 ml of concentrated sulfuric acid into a 250 ml four-necked flask, and mix them evenly under the action of ultrasound , then stirred in an ice-water bath and slowly added 6.0 g of potassium permanganate. Subsequently, the temperature of the reaction system was raised to 40° C., and the reaction was stirred at high speed for 6 hours. Then, while slowly adding 80 milliliters of distilled water, the system was heated up to 70° C. and reacted for half an hour. Then add 100 milliliters of distilled water and 6 milliliters of hydrogen peroxide (mass percentage concentration is 30%) to the system, and stop the reaction after 5 minutes to obtain a bright yellow graphene oxide mother liquor, and add an appropriate amo...

Embodiment 2

[0041] Weigh 50 milligrams of polystyrene covalently functionalized graphene and add it to 50 ml of THF, and ultrasonically disperse it for 5 minutes. Experiments show that polystyrene covalently functionalized graphene has good dispersion in THF. There is no delamination, and the dispersion effect of polystyrene covalently functionalized graphene in THF is shown in Figure 7 (a).

Embodiment 3

[0043] Solvent is DMF, and other conditions are the same as embodiment 2, and experiment shows, polystyrene covalently functionalized graphene has good dispersibility in DMF, puts 6 months and does not see delamination, polystyrene covalently functionalized graphite See the diagram of the dispersion effect of alkenes in DMF Figure 7 (b).

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Abstract

The invention discloses a method for quickly functionalizing graphene with covalent polystyrene, wherein the polystyrene is covalently bonded to the surface of the graphene by using a mild and high-efficiency method and is subjected to functionalizing modification. The method comprises the following steps: preparing oxidized graphene by using a Hummers method, preparing alkynylation graphene, preparing polystyrene by an RAFT method, and finally preparing polystyrene covalent functionalizing graphene by using a click chemistry method. The click chemistry method is a new method for realizing material chaining and has the advantages that the reaction operation is simple, the reaction conditions are mild, the reaction has stereoselectivity, products are easy to separate, the post-treatment is simple, the side reactions are a few, and the reaction recovery rate is high. Based on experiments, the prepared polystyrene covalent functionalizing graphene has excellent compatibility in organic solvent, can be directly used as a nano composite material and also can be used as a filler to reinforce a polymer material.

Description

Technical field [0001] The present invention is a chemical composite material field, and it involves a method of fast use of polystyrene covalent function. Background technique [0002] The polymer composite materials of gallery oxide have broad application prospects, but there are often many problems during processing such composite materials, mainly due to the weakness and compatibility of the interface with polymer materials.Compared with non -covalent modification, the covalent bonds of graphite and oxygen dilutes are stronger, which can not only solve this problem well, but also give it new performance and expand its application field.The surface layer of galgaining graphide is a large amount of oxygen -containing groups such as hydroxyl, carboxyl, and epoxy groups. These groups provide reaction sites for the covariest bonding of graphene.For example, under the condition of adding the bivisal self -based carbonidide (DCC) as a catalyst, the carboxyl carboxyl and the amino -b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/08C09C3/10C08F112/08C08F2/38
Inventor 欧宝立何聪李政峰周虎周智华
Owner HUNAN UNIV OF SCI & TECH
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