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Preparation method of grapheme/fluoroether rubber modified by covalent bond of fluorine-containing ionic liquid

An ionic liquid and fluoroether rubber technology, applied in the field of graphene/fluoroether rubber preparation, can solve problems such as poor compatibility, and achieve the effects of easy implementation, excellent comprehensive performance and good application prospects

Active Publication Date: 2016-10-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a preparation method of graphene / fluoroether rubber covalently bonded with fluorine-containing ionic liquids, and the graphene / fluoroether rubber prepared by the method effectively overcomes graphite Due to the defects of easy self-aggregation of graphene and poor compatibility with rubber molecules, the fluoroether rubber filled with the functional graphene of the present invention has good mechanical properties, friction and wear resistance, and high temperature resistance, and the preparation method of the present invention is simple and easy , has a good application prospect

Method used

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  • Preparation method of grapheme/fluoroether rubber modified by covalent bond of fluorine-containing ionic liquid
  • Preparation method of grapheme/fluoroether rubber modified by covalent bond of fluorine-containing ionic liquid

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preparation example Construction

[0037] The preparation method of the graphene / fluoroether rubber modified by the covalent bond of the fluorine-containing ionic liquid of the present invention specifically comprises the following steps:

[0038] (1), fluorine-containing ionic liquid grafted graphite oxide

[0039]Mix fluorine-containing ionic liquid, graphite oxide and catalyst in an organic solvent, ultrasonically treat the graphite oxide in a water bath for 1-4 hours until the graphite oxide is uniformly dispersed, and then conduct a low-temperature reaction in a nitrogen atmosphere, the reaction temperature is 40°C-60°C, and the reaction time is 6 -48h. Purify the reaction product, remove the ionic liquid and catalyst that did not participate in the reaction, and dry the purified sample to obtain fluorine-containing ionic liquid grafted graphite oxide. The purification treatment method is centrifugal washing, vacuum filtration washing or decompression One or a combination of distillation. The mass ratio ...

Embodiment 1

[0057] 1. Ionic liquid grafted graphite oxide

[0058] Weigh 1g of graphite oxide, 1g of 1-aminopropyl-3-methylimidazolium trifluoromethanesulfonimide, 1g of N,N'-dicyclohexylcarbonimide, 50mg of p-dimethylaminopyridine, and weigh 200mL of N,N-dimethylformamide was placed in the flask. After sonicating in a water bath for 2 h, the reaction was carried out in a nitrogen atmosphere at a controlled temperature of 50° C. for 24 h. The reaction product is purified by centrifugal washing, unreacted ionic liquid and catalyst are removed, and the product is vacuum-dried.

[0059] Such as image 3 Shown is the structural formula of graphite oxide grafted with ionic liquid prepared in Example 1 of the present invention.

[0060] 2. Reduction of ionic liquid grafted graphite oxide

[0061] 1 g of grafted graphite oxide was weighed and placed in a crucible, and heat-treated in an oven at 230° C. for 1 h to obtain a fluffy flocculent ionic liquid-modified redox functional graphene prod...

Embodiment 2

[0069] 1. Ionic liquid grafted graphite oxide

[0070] Weigh 1g of graphite oxide, 2g of 1-aminopropyl-3-methylimidazolium tetrafluoroborate, 1g of N,N'-dicyclohexylcarbimide, 50mg of p-dimethylaminopyridine, weigh 200mL with N , N-dimethylformamide was placed in the flask. After ultrasonic treatment in a water bath for 1 h, the reaction was carried out at 40° C. for 36 h in a nitrogen atmosphere. The reaction product is purified by centrifugal washing, unreacted ionic liquid and catalyst are removed, and the product is vacuum-dried.

[0071] 2. Reduction of ionic liquid grafted graphite oxide

[0072] 1 g of grafted graphite oxide was weighed and placed in a crucible, and heat-treated in an oven at 250° C. for 1 h to obtain a fluffy flocculent ionic liquid-modified redox functional graphene product.

[0073] 3. Mixing and molding of functional graphene and fluoroether rubber

[0074] Weigh 100g fluoroether rubber raw rubber, 1g functional graphene, 4g magnesium oxide, 3g ...

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Abstract

The invention relates to grapheme / fluoroether rubber modified by a covalent bond of fluorine-containing ionic liquid, and a preparation method of the grapheme / fluoroether rubber. A chemical reaction between organic functional groups is utilized to enable ionic liquid to be grafted on the surface of graphite oxide, thermal recovery is performed to obtain functional filler, and the filler fluoroether raw rubber and a compounding agent are mixed, vulcanized and molded to obtain a final product. The grapheme / fluoroether rubber effectively overcomes the defects that grapheme can easily self-aggregate and the compatibility with rubber molecules is poor, and the fluoroether rubber filled with the functional grapheme provided by the invention has excellent mechanical properties, friction resistance, wear resistance, and high temperature resistance; moreover, the preparation method is easy and simple, and has a good application prospect.

Description

technical field [0001] The invention relates to the fields of graphene and fluororubber, in particular to a preparation method of graphene / fluoroether rubber covalently bonded with fluorine-containing ionic liquid. Background technique [0002] Fluorocarbon rubber is a high molecular polymer containing a large amount of fluorocarbon and fluoroalkyl ether molecular structure. Because of its excellent high and low temperature resistance, strong oxidant resistance and resistance to various chemical media, it is used as a sealing material under extreme conditions. Filler is an important component in fluoroether rubber, and the filler with excellent performance can improve the performance of fluoroether rubber material to a certain extent. The traditional fluoroether rubber system uses carbon black as a filler, which has a large filling amount and lacks electrical and thermal functions, so it can no longer meet the performance requirements of the material for special sealing con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12C08K13/06C08K9/04C08K3/04
CPCC08K3/04C08K9/04C08K13/06C08L2201/08C08L27/12
Inventor 王昊张继华张辉赵云峰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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