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Method for preparing grafting polyvinylidene fluoride on graphene oxide

A polyvinylidene fluoride and vinylidene fluoride technology, applied in the field of materials, can solve the problems of poor compatibility and low flexibility, and achieve the effects of good thermal stability, high tensile strength and good dispersion.

Active Publication Date: 2018-09-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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 become an important research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of graphene oxide grafted polyvinylidene fluoride includes the following steps:

[0035] 1) Preparation of graphene oxide using improved Hummer’s method

[0036] Under ice water bath conditions, 3g graphite powder, 15g KMnO 4 Add 115mL of concentrated H with a mass concentration of 98% 2 SO 4 Stir in a beaker, heat to 45°C, and stop the reaction after 12 hours; under ice-water bath conditions, pour the reaction product into a large beaker containing 200 mL of distilled water, and add 15 mL of 30% H 2 O 2 , The color of the solution changes from dark brown to golden brown; use 100mL of diluted H with a molar concentration of 1mol / L 2 SO 4 Washing with distilled water repeatedly until the solution is neutral, drying in vacuum to obtain graphene oxide;

[0037] (2) Surface modification of graphene oxide

[0038] Under ice-water bath conditions, add the graphene oxide (0.2g) obtained in step (1) into dewatered tetrahydrofuran (20mL), ultrasonically disperse fo...

Embodiment 2

[0046] The preparation method of graphene oxide grafted polyvinylidene fluoride includes the following steps:

[0047] (1) The improved Hummer’s method is used to prepare graphene oxide, and the preparation process is the same as that of the above-mentioned Example 1;

[0048] (2) Surface modification of graphene oxide

[0049] Under ice-water bath conditions, add the graphene oxide (0.2g) obtained in step (1) to dewatered tetrahydrofuran (10mL), ultrasonically disperse for 5min, add to the reaction flask and stir, add 0.3g carboxyxanthate in turn , 0.0453g 4-dimethylaminopyridine and 0.1532g dicyclohexylcarbodiimide, react at room temperature for 12 hours, filter, and vacuum dry at 60°C for 12 hours to obtain surface-modified graphene oxide;

[0050] The preparation method of the carboxyxanthogenate is the same as in Example 1;

[0051] (3) Preparation of graphene oxide grafted polyvinylidene fluoride polymer

[0052] Add the surface-modified graphene oxide (0.01g) obtained in step (2)...

Embodiment 3

[0055] The preparation method of graphene oxide grafted polyvinylidene fluoride includes the following steps:

[0056] (1) The improved Hummer’s method is used to prepare graphene oxide, and the preparation process is the same as that of the above-mentioned Example 1;

[0057] (2) Surface modification of graphene oxide

[0058] Under ice-water bath conditions, add the graphene oxide (0.2g) obtained in step (1) to dewatered tetrahydrofuran (10mL), ultrasonically disperse for 5min, add to the reaction flask and stir, add 0.1g carboxyxanthate in turn , 0.0453g 4-dimethylaminopyridine and 0.1532g dicyclohexylcarbodiimide, react at room temperature for 12 hours, filter, and vacuum dry at 60°C for 12 hours to obtain surface-modified graphene oxide;

[0059] The preparation method of the carboxyxanthogenate is the same as in Example 1;

[0060] (3) Preparation of graphene oxide grafted polyvinylidene fluoride polymer

[0061] Add the surface-modified graphene oxide (0.02g) obtained in step (2)...

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Abstract

The invention discloses a method for preparing grafting polyvinylidene fluoride on graphene oxide, and belongs to the field of materials. The method for preparing the grafting polyvinylidene fluorideon graphene oxide comprises the steps of 1, adopting an improved Hummer's method for preparing graphene oxide; 2, modifying the surface of graphene oxide; 3, preparing a polymer of grafting polyvinylidene fluoride on graphene oxide. According to the method, the grafting rate can be obviously increased, and the preparing technology is simple, and the method suitable for industrial production; the prepared material has the advantages of being high in tensile strength, good in heat stability and high in mechanical strength.

Description

Technical field [0001] The invention relates to the field of materials, in particular to a method for preparing graphene oxide grafted polyvinylidene fluoride. Background technique [0002] Graphene is composed of a single layer of carbon atoms with sp 2 The new two-dimensional nanomaterials formed by the densely packed hybrid structure are the thinnest material and the strongest material. It has high mechanical strength and electrical properties. It has attracted people’s interest in life sciences, electronic devices, and enhanced materials. Extensive research. However, the surface of graphene is inert, has high chemical stability, and is easy to accumulate and is difficult to peel off and disperse. Therefore, graphene oxide with higher activity is used for polymer grafting. [0003] As a precursor of graphene, graphene oxide was discovered by William S. Hummers as early as 1958. With the development of graphene research in recent years, the properties and applications of graphen...

Claims

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Application Information

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IPC IPC(8): C01B32/198C08F114/22C08F2/38
CPCC01B32/198C08F2/38C08F114/22C01P2006/40C01P2002/82
Inventor 徐琳张炉青张书香宗传永张亚彬翟丛丛朱忠凯
Owner UNIV OF JINAN
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