Preparation method of click chemical synthesis of graphene oxide grafted fluoropolymer

A technology of synthetic oxidation and click chemistry, applied in the field of materials, can solve problems such as unstable modification methods, and achieve the effects of improving compatibility, simple process and high tensile strength

Active Publication Date: 2021-04-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a click chemically synthesized graphene oxide grafted fluorine-containing polymer with good dispersion performance and not easy to agglomerate. It solves the problem of instability of general modification methods and realizes the permanent modification of

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  • Preparation method of click chemical synthesis of graphene oxide grafted fluoropolymer
  • Preparation method of click chemical synthesis of graphene oxide grafted fluoropolymer
  • Preparation method of click chemical synthesis of graphene oxide grafted fluoropolymer

Examples

Experimental program
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Embodiment 1

[0043] A preparation method for click chemical synthesis of graphene oxide grafted fluoropolymer, comprising the following steps:

[0044] 1) Prepare graphene oxide by improving Hummer's method

[0045] Under the condition of ice-water bath, 3g graphite powder, 15g KMnO 4 Add 115mL of 98% concentrated H 2 SO 4 Stir in a beaker, heat up to 45°C, and stop after 12 hours of reaction; under ice-water bath conditions, pour the reaction product into a large beaker filled with 200mL distilled water, and add 15mL of 30% volume concentration of H 2 o 2 , the solution color changed from dark brown to golden brown; with 100mL dilute H with a molar concentration of 1mol / L 2 SO 4 and distilled water repeatedly washed until the solution is neutral, vacuum-dried to obtain graphene oxide;

[0046] (2) Alkynylation of graphene oxide

[0047] Weigh 0.1641g of graphene oxide obtained in step (1) and disperse it in 100mL of anhydrous tetrahydrofuran by ultrasonic for 5min, add it into the ...

Embodiment 2

[0056] A preparation method for click chemical synthesis of graphene oxide grafted fluoropolymer, comprising the following steps:

[0057] (1) adopt improved Hummer's method to prepare graphene oxide, and preparation process is with above-mentioned embodiment 1;

[0058] (2) Alkynylation of graphene oxide:

[0059] Weigh 0.1641g of graphene oxide obtained in step (1) and disperse it in 100mL of anhydrous N,N-dimethylformamide by ultrasonic for 10min, add it into the flask and stir, then add 0.1032g of propiolic acid, 0.0018g of 4- Dimethylaminopyridine and 0.0103g dicyclohexylcarbodiimide were subjected to an esterification reaction, reacted at room temperature for 6h, filtered, and dried in vacuum to obtain graphene oxide with alkynyl groups;

[0060] (3) Azidation of fluoropolymers

[0061] Take 200mL of N-methylpyrrolidone, weigh 0.27g of tert-butyl peroxypivalate and 1.0324g of perfluoroiodohexane into the reaction kettle, and then feed 15g of vinylidene fluoride gas mon...

Embodiment 3

[0067] A preparation method for click chemical synthesis of graphene oxide grafted fluoropolymer, comprising the following steps:

[0068] (1) adopt improved Hummer's method to prepare graphene oxide, and preparation process is with above-mentioned embodiment 1;

[0069] (2) Alkynylation of graphene oxide:

[0070] Weigh 0.1641g of graphene oxide obtained in step (1) and disperse it ultrasonically in 40mL of anhydrous tetrahydrofuran for 5min, add to the flask and stir, then add 0.019g of propiolic acid, 0.0018g of 4-dimethylaminopyridine and 0.006g of dimethicone Cyclohexylcarbodiimide is subjected to an esterification reaction, reacted at room temperature for 1h, filtered, and vacuum-dried to obtain graphene oxide with an alkynyl group;

[0071] (3) Azidation of fluoropolymers:

[0072] Take 200mL trifluorotrichloroethane, weigh 0.0718g tert-butyl peroxypivalate and 0.669g perfluoroiodohexane into the reaction kettle, and then feed 14.4g of vinylidene fluoride gas monomer ...

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Abstract

The invention discloses a preparation method for click chemical synthesis of graphene oxide grafted fluorine-containing polymer, which belongs to the field of materials. The preparation method of described click chemistry synthesis graphene oxide grafted fluorine-containing polymer, comprises: (1) adopts improved Hummer's method to prepare graphene oxide; (2) alkynylation of graphene oxide; (3) fluorine-containing polymer (4) Click chemistry synthesis of graphene oxide grafted fluoropolymer. The invention can significantly increase the grafting rate, has simple preparation process and is suitable for industrial production; the material prepared by the invention has the characteristics of high tensile strength, good thermal stability and high mechanical strength.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method for click chemical synthesis of graphene oxide grafted fluorine-containing polymers. Background technique [0002] Graphene oxide is an oxidized derivative of graphene, which was discovered by William S. Hummers as early as 1958. It has a huge specific surface area, and a large number of oxygen-containing hydrophilic groups on the surface make it have excellent hydrophilic properties. It is beneficial for further functional modification. As a filler for graphene oxide-polymer composites, it can effectively enhance the mechanical and electrical properties of the polymer, improve its hydrophilicity and tensile strength, and is an excellent membrane modification material. However, its flexibility is low, and its compatibility with polymers is also poor. Therefore, improving the compatibility of graphene oxide with polymers and enhancing its solubility in solvents has b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 张炉青徐琳翟丛丛张亚彬宗传永张书香
Owner UNIV OF JINAN
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