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A thermoplastically processable polyvinyl alcohol/graphene hydrophobic composite material and its preparation method and application

A thermoplastic processing and composite material technology, applied in the field of polyvinyl alcohol/graphene hydrophobic composite material and its preparation, can solve the problems such as the inability to prepare stable and uniformly dispersed graphene solution, and achieve the improvement of production efficiency and operational safety, Simple preparation process and wide application prospects

Active Publication Date: 2020-12-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101602504A discloses a method for preparing graphene based on ascorbic acid. Ascorbic acid is used instead of highly toxic hydrazine hydrate to reduce graphene oxide. However, when the reduction time is too long, the reduced graphene will aggregate into blocks and cannot be produced. Uniformly dispersed graphene solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Graphene oxide suspension (Nanjing Jicang Nano Technology Co., Ltd., 9mg / ml, carbon-oxygen ratio is 2.03, solvent is deionized water) and ascorbic acid (Sinopharm Chemical Reagent Co., Ltd., analytically pure) with a weight ratio of 1:2 Ultrasonic mixing in deionized water is uniform, then adding the weight concentration of configuration is 20% polyvinyl alcohol solution (Japan Kuraray, CP-1000, degree of alcoholysis 78%) ultrasonic mixing, place one day at room temperature and carry out spray drying (Shanghai Okawara Drying Equipment Co., Ltd.); Wherein the carbon-oxygen ratio of the part graphene oxide obtained after mixing graphene oxide and ascorbic acid for one day is 7.81, (the carbon-oxygen ratio is tested by X-ray photoelectron spectroscopy (XPS) for the respective carbon and oxygen ratios mole fraction, then the two are compared and calculated) wherein the weight ratio of part graphene oxide and polyvinyl alcohol is 2:100, and the weight percent concentration of...

Embodiment 2

[0037] Except that the weight ratio of graphene oxide and ascorbic acid is 1:3, the carbon-oxygen ratio of the partially oxidized graphene obtained after mixing graphene oxide and ascorbic acid for one day is 8.76, and the rest are the same as in Example 1, and the contact angle tester is tested It shows that the contact angle is 105.9°.

Embodiment 3

[0039] Except that the weight ratio of graphene oxide and polyvinyl alcohol is 5:100, all the others are the same as in Example 1, and the test result of the contact angle tester shows that the contact angle is 101.8°.

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Abstract

The invention relates to a thermoplastically-processed polyvinyl alcohol / graphene hydrophobic composite material and preparation method and application thereof in the field of a high-molecular material. The weight ratio of graphene to polyvinyl alcohol is from 0.1: 100 to 20: 100, and the alcoholysis degree of polyvinyl alcohol is 68-80%. The preparation method comprises mixing a polyvinyl alcohol solution with graphene or a graphene solution and performing spray drying and thermoplastical processing to form a hydrophobic material. The method is simple in preparation process, easy to operate, good in applicability, and relatively low in equipment cost.

Description

technical field [0001] The invention relates to the field of polymer materials, and furthermore, relates to a thermoplastically processable polyvinyl alcohol / graphene hydrophobic composite material and its preparation method and application. Background technique [0002] Polyvinyl alcohol has excellent properties such as biocompatibility, oil resistance, solvent resistance, and gas barrier properties, and is widely used in textiles, food, medicine, construction, printing, steel, polymer chemicals and other industries. Since there are a large number of hydroxyl groups on the polymer chain of polyvinyl alcohol, a large number of intramolecular and intermolecular hydrogen bonds will be formed, making the melting temperature and decomposition temperature of polyvinyl alcohol with high degree of alcoholysis similar, and it is difficult to realize thermoplastic processing. The application of polyvinyl alcohol is limited to a large extent. [0003] At present, for the melt process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L9/04C08K3/04
CPCC08K3/04C08K9/04C08L29/04
Inventor 乔金樑胡晨曦张晓红宋志海蔡传伦戚桂村李秉海王湘赖金梅高建明张红彬蒋海斌张江茹
Owner CHINA PETROLEUM & CHEM CORP