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Method for carrying out graft modification on graphene by virtue of styrene-maleic anhydride copolymer

A technology of maleic anhydride and graft modification is applied in the field of preparation of new carbon materials, which can solve the problems of high reaction temperature, long reaction time, and unclear application direction, and achieve the effect of good dispersion and improved mechanics.

Inactive Publication Date: 2017-07-07
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of these functionalization methods are that the reaction temperature is high, the reaction time is long, the experimental process is complicated, and the structural design of functionalized graphene is not targeted, and the application direction is not clear.

Method used

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  • Method for carrying out graft modification on graphene by virtue of styrene-maleic anhydride copolymer
  • Method for carrying out graft modification on graphene by virtue of styrene-maleic anhydride copolymer
  • Method for carrying out graft modification on graphene by virtue of styrene-maleic anhydride copolymer

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Experimental program
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Effect test

preparation example Construction

[0021] (1) Preparation of graphene oxide: graphene oxide (GO) prepared by the improved Hummers' method; the main functional groups contained on the surface of graphene oxide are hydroxyl, carboxyl and epoxy groups;

[0022] (2) Preparation of maleic anhydride grafted graphene oxide: the graphene oxide and maleic anhydride obtained in step 1) are dispersed in an organic solvent to make a suspension, and the hydroxyl group on the graphene oxide surface is formed at 35- React with maleic anhydride at 80°C for 3-6 hours, and use monomer grafting to graft maleic anhydride onto graphene oxide; the mass ratio of graphene oxide to maleic anhydride is 1:10-1:30; The organic solvent is at least one of toluene, benzene, N,N-dimethylformamide or N,N-dimethylacetamide;

[0023] (3) Preparation of styrene-maleic anhydride copolymer grafted graphene oxide: with the graphene oxide grafted with maleic anhydride obtained in step 2) as raw material, add a free radical initiator, and mix with St...

Embodiment 1

[0043] (1) Preparation of graphene oxide: graphene oxide prepared by improved Hummers' method;

[0044] (2) Preparation of maleic anhydride grafted graphene oxide: disperse 0.2g graphene oxide and 6.0g maleic anhydride in toluene to make a suspension, react at 80°C for 3 hours, and graft maleic anhydride onto graphene oxide;

[0045] (3) Preparation of styrene-maleic anhydride copolymer grafted graphene oxide: 0.2g AIBN, 5g styrene, and 4.8g maleic anhydride were added to maleic anhydride grafted graphene oxide, and reacted at 80°C 1 hour; the reaction product was ultrasonically washed three times with acetone, centrifuged and then vacuum-dried at 80° C. to obtain styrene-maleic anhydride copolymer grafted graphene oxide.

[0046] TGA analysis showed that the effective grafting rate was 23.7%.

Embodiment 2

[0048] (1) Preparation of graphene oxide: graphene oxide prepared by improved Hummers' method;

[0049] (2) Preparation of maleic anhydride grafted graphene oxide: disperse 0.2g graphene oxide and 2.0g maleic anhydride in toluene to make a suspension, react at 60°C for 3 hours, and graft maleic anhydride onto graphene oxide;

[0050] (3) Preparation of styrene-maleic anhydride copolymer grafted graphene oxide: 0.2g BPO, 2g styrene, and 2g maleic anhydride were added to maleic anhydride grafted graphene oxide, and reacted at 70°C for 3 Hours; the reaction product was ultrasonically washed three times with acetone, centrifuged and then vacuum-dried at 80° C. to obtain styrene-maleic anhydride copolymer grafted graphene oxide.

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Abstract

The invention discloses a method for carrying out graft modification on graphene by virtue of a styrene-maleic anhydride copolymer. The method comprises the following steps: taking graphite powder as a raw material, preparing graphene oxide (GO) by utilizing an improved Hummers' process, then grafting maleic anhydride to the GO by adopting a monomer grafting way, then taking a free radical initiator, styrene and maleic anhydride as functional modification reagents, carrying out in situ polymerization, solvent washing and centrifugal separation, and drying, so that styrene-maleic anhydride copolymer grafted graphene oxide is obtained. Grafting ratio of the obtained SMAFG is 20-50%. The styrene-maleic anhydride copolymer grafted graphene oxide can be well dispersed and form stable chemical bonding in a process of preparing a styrene-maleic anhydride copolymer grafted graphene oxide / polymer matrix composite material with the polymer matrix and has the effect of better improving mechanical and thermal properties of a polymer.

Description

technical field [0001] The invention relates to a novel carbon material preparation technology, in particular to a method for grafting and modifying graphene with a styrene-maleic anhydride copolymer. Background technique [0002] Graphene is a sp 2 A two-dimensional crystalline material formed by infinitely expanding six-membered rings formed by hybridized carbon atoms. Each C atom in single-layer graphene is connected to other three adjacent C atoms through a σ bond. The C-C bond angle is 120° and the bond length is about 0.142nm. Graphene is the hardest material found so far. Alkenes are composed of C-C bonds, so they are very rigid, making them stronger than diamonds. The excellent mechanical properties of graphene are manifested in its high strength and high modulus. Studies have shown that the mechanical strength of graphene is close to 125GPa, and its Young's modulus reaches 1.1TPa, which is equivalent to carbon nanotubes and is the strength of ordinary steel. more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F222/06C08F212/08C08L77/06C08L67/02C08L69/00C08K9/04C08K3/04
CPCC08F292/00C08K3/04C08K9/04C08F222/06C08F212/08C08L77/06C08L67/02C08L69/00
Inventor 张兴祥周龙飞刘海辉王学晨
Owner TIANJIN POLYTECHNIC UNIV
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