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Method for preparing graphene oxide grafted with thermotropic liquid crystal compound with end group containing epoxy group

A liquid crystal compound, thermotropic technology, applied in the field of material chemistry, can solve the problems of difficult mass production and application, complex operation process and high cost, and achieve the effects of improved mechanical and thermal properties, simple process and low pollution.

Inactive Publication Date: 2012-11-07
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These have determined that graphene / polymer-based composites are the current research hotspots. At present, there are various preparation methods for graphene / polymer-based composites, but most of them have complicated operation processes, pollution, high cost, and are difficult to produce in the world. Industrial large-scale production and application, and the concept of thermotropic liquid crystal grafted graphene oxide compounds containing epoxy groups at the end has never been used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 2 grams of terephthaloyl chloride and 1.5 grams of p-hydroxybenzoic acid into 15 milliliters of N,N-dimethylformamide (DMF) solvent, add 0.05 g of pyridine as a catalyst dropwise, and place under magnetic stirring React at 80°C for 6 hours; add 8 ml of thionyl chloride (SOCl 2 ) to continue the reaction for 12 hours; add 3 grams of diethylene glycol to continue the reaction for 6 hours; add 2.5 grams of glycidyl alcohol, drop 0.2g butyltin dilaurate as a catalyst, and continue the reaction for 6 hours. After the reaction, Precipitate the product with a large amount of water, filter it under reduced pressure, wash the product three times with absolute ethanol, and dry it to obtain a milky white thermotropic liquid crystal compound containing epoxy groups at the end.

[0021] (2) Mix 0.1 g of graphite oxide and 50 ml of N,N-dimethylformamide (DMF), and disperse in an ultrasonic environment for 60 minutes to form a uniformly dispersed graphene oxide mixed solutio...

Embodiment 2

[0026] (1) Weigh 2 grams of terephthaloyl chloride and 3 grams of p-hydroxybenzoic acid and add them to 15 ml of N,N-dimethylformamide (DMF) solvent, add 0.1 g of pyridine as a catalyst dropwise, and place under magnetic stirring React at 80°C for 6 hours; add 10 ml of thionyl chloride (SOCl 2 ) to continue the reaction for 24 hours; add 4 grams of diethylene glycol and continue the reaction for 6 hours; then add 3.5 grams of glycidyl alcohol, add dropwise 0.3 g of butyltin dilaurate as a catalyst, and continue the reaction for 6 hours. After the reaction, Precipitate the product with a large amount of water, filter it under reduced pressure, wash the product three times with absolute ethanol, and dry it to obtain a milky white thermotropic liquid crystal compound containing epoxy groups at the end.

[0027] (2) Mix 0.1 g of graphite oxide and 50 ml of N,N-dimethylformamide (DMF) and disperse in an ultrasonic environment for 90 minutes to form a uniformly dispersed graphene ox...

Embodiment 3

[0032](1) Weigh 4 grams of terephthaloyl chloride and 1.5 grams of p-hydroxybenzoic acid into 15 milliliters of N,N-dimethylformamide (DMF) solvent, add 0.1 g of pyridine as a catalyst dropwise, and place under magnetic stirring React at 80°C for 6 hours; add 8 ml of thionyl chloride (SOCl 2 ) to continue the reaction for 24 hours; add 3 grams of diethylene glycol to continue the reaction for 6 hours; add 2.5 grams of glycidyl alcohol, drop 0.5g butyltin dilaurate as a catalyst, and continue the reaction for 6 hours. After the reaction, Precipitate the product with a large amount of water, filter it under reduced pressure, wash the product three times with absolute ethanol, and dry it to obtain a milky white thermotropic liquid crystal compound containing epoxy groups at the end.

[0033] (2) Mix 0.1 g of graphite oxide and 50 ml of N,N-dimethylformamide (DMF) and disperse in an ultrasonic environment for 120 minutes to form a uniformly dispersed graphene oxide mixed solution....

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Abstract

The invention discloses a method for preparing graphene oxide grafted with a thermotropic liquid crystal compound with an end group containing an epoxy group. P-phthanoyl chloride, p-hydroxybenzoic acid, thionyl chloride, diethylene glycol and glycidol are used as raw materials to react to obtain the thermotropic liquid crystal compound with the end group containing the epoxy group with pyridine and lauric acid butyltin as catalyst; thionyl chloride is added into graphene oxide mixed liquid formed by ultrasonic dispersion to react to obtain acyl chlorination graphene oxide; and acyl chlorination graphene oxide and thermotropic liquid crystal compound with the end group containing the epoxy group are used as raw materials and react with pyridine as catalyst to obtain graphene oxide grafted with the thermotropic liquid crystal compound with the end group containing the epoxy group. The graphite oxide is obtained by using Hummers oxidation method with chemical pure crystalline flake graphite as a raw material. Other chemical solvents are analytically pure. The raw materials are wide in source, simple in preparation process, free of pollution, low in cost and favorable for industrial large-scale production.

Description

technical field [0001] The technical field of the invention belongs to the field of material chemistry, and in particular relates to a method for grafting graphene oxide with a thermotropic liquid crystal compound containing an epoxy group at a terminal. Background technique [0002] In 2004, Geim's group at the University of Manchester obtained a new type of two-dimensional atomic crystal - graphene for the first time through mechanical exfoliation. 2 The theoretical thickness of the two-dimensional honeycomb lattice formed by hybrid connection is only 0.35nm, which is the thinnest two-dimensional material found so far. The special structure of graphene makes it exhibit excellent physical and chemical properties. For example, graphene has the highest strength among known materials; its carrier mobility reaches 1.5×10 4 cm 2 ·V -1 ·S -1 , under certain conditions (such as low temperature quenching, etc.), its mobility can even be as high as 2.5×10 5 cm 2 ·V -1 ·S -1...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08G63/91C08G63/66C08G63/78C09K19/38
Inventor 李善荣陆绍荣凌日华祁博袁正凯
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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