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Film composite material based on nanocellulose-graphene oxide as well as preparation method and application of film composite material

A thin-film composite material and nano-cellulose technology, which is applied in the analysis of materials, material analysis through electromagnetic means, instruments, etc., can solve the problem that the cellulose film cannot block the passage of gas, achieve excellent detection performance, simple process flow, and raw materials Easy to get effect

Pending Publication Date: 2021-04-13
浙江晨阳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is precisely because of its nanofiber network porous structure that the cellulose membrane cannot block the gas passing through its internal porous channels, so nanocellulose cannot be used alone as a solid electrolyte membrane in electrochemical gas sensors.

Method used

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  • Film composite material based on nanocellulose-graphene oxide as well as preparation method and application of film composite material
  • Film composite material based on nanocellulose-graphene oxide as well as preparation method and application of film composite material
  • Film composite material based on nanocellulose-graphene oxide as well as preparation method and application of film composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of graphene oxide and nanocellulose

[0048] The preparation of graphene oxide was prepared by Hummers' method: first, 360mL of 98% concentrated sulfuric acid and 40mL of 85% concentrated phosphoric acid were mixed in a round bottom flask under ice bath conditions, and then 2g of graphite powder was slowly added to the mixed concentrated acid, mechanically Stir for 1h. Slowly add 18g of strong oxidant potassium permanganate into the mixture, keep stirring at 50°C for 16h, then cool the solution to stop the oxidation reaction. Add 400 mL of deionized water and 20 mL of hydrogen peroxide solution dropwise into the mixed solution, and stir for 30 min. Subsequently, the mixed solution was centrifuged and washed with deionized water, 5% hydrochloric acid solution and ethanol solution, respectively. Finally, the graphene oxide solution is freeze-dried to obtain graphene oxide powder.

[0049] The raw material for the preparation of cellulose nanofibers is p...

Embodiment 2

[0054] (1) Preparation of graphene oxide and nanocellulose

[0055] The preparation of graphene oxide was prepared by Hummers' method: first, 360mL of 98% concentrated sulfuric acid and 40mL of 85% concentrated phosphoric acid were mixed in a round bottom flask under ice bath conditions, and then 2g of graphite powder was slowly added to the mixed concentrated acid, mechanically Stir for 1h. Slowly add 18g of strong oxidant potassium permanganate into the mixture, keep stirring at 50°C for 16h, then cool the solution to stop the oxidation reaction. Add 400 mL of deionized water and 20 mL of hydrogen peroxide solution dropwise into the mixed solution, and stir for 30 min. Subsequently, the mixed solution was centrifuged and washed with deionized water, 5% hydrochloric acid solution and ethanol solution, respectively. Finally, the graphene oxide solution is freeze-dried to obtain graphene oxide powder.

[0056] The raw material for the preparation of cellulose nanofibers is p...

Embodiment 3

[0061] (1) Preparation of graphene oxide and nanocellulose

[0062] The preparation of graphene oxide was prepared by Hummers' method: first, 360mL of 98% concentrated sulfuric acid and 40mL of 85% concentrated phosphoric acid were mixed in a round bottom flask under ice bath conditions, and then 2g of graphite powder was slowly added to the mixed concentrated acid, mechanically Stir for 1h. Slowly add 18g of strong oxidant potassium permanganate into the mixture, keep stirring at 50°C for 16h, then cool the solution to stop the oxidation reaction. Add 400 mL of deionized water and 20 mL of hydrogen peroxide solution dropwise into the mixed solution, and stir for 30 min. Subsequently, the mixed solution was centrifuged and washed with deionized water, 5% hydrochloric acid solution and ethanol solution, respectively. Finally, the graphene oxide solution is freeze-dried to obtain graphene oxide powder.

[0063] The raw material for the preparation of cellulose nanofibers is p...

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Abstract

The invention discloses a film composite material based on nanocellulose-graphene oxide. The composite material comprises nanocellulose and graphene oxide, nanofibers are wrapped and covered by graphene oxide lamellas, and the graphene oxide lamellas are inserted into a nanocellulose network, so that a three-dimensional semi-interpenetrating network structure is formed. The invention also discloses a preparation method of the film composite material. The preparation method comprises the following steps: (1) preparing graphene oxide and nanocellulose; (2) putting the graphene oxide and nanocellulose in a solution and conducting stirring; (3) dropwise adding 3-methacryloxypropyltrimethoxysilane, conducting stirring at room temperature, conducting centrifuging and washing, and removing residues; and (4) adding a hydrogen peroxide solution for reaction, conducting washing to remove impurities to obtain a mixed solution, and conducting filtering to form a film, thereby obtaining the nanocellulose / graphene oxide film composite material. The film composite material provided by the invention can show optimal detection performance when being used in an electrochemical sensor, and has good sensitivity and stability.

Description

technical field [0001] The invention relates to a thin film composite material, in particular to a conductive thin film composite material. It also relates to the preparation method of this composite material, and the use of this composite material. Background technique [0002] With the increasing demand for gas detection in industrial production, household air monitoring, food and drug safety, and automotive automation systems, gas sensor technology is ushering in a period of vigorous development. The research of gas sensors permeates many disciplines such as chemistry, mechanics, thermal science, biology, semiconductor technology, microelectronics technology, etc., and is widely used in many fields such as automobile, aviation, security inspection, environment, food, and medical safety. Based on different physical, chemical and electronic science and technology, gas sensors can be divided into various types according to their detection principles, including metal oxide s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/08C08K9/06C08K3/04C08B15/05G01N27/407
CPCC08B15/05C08J5/18C08J2301/08C08K9/06C08K3/042G01N27/4074G01N27/4075
Inventor 陈忠伟
Owner 浙江晨阳新材料有限公司
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