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A gas-sensitive film sensitive to ethanol and acetone and a preparing method thereof

A film and acetone technology, applied in the field of gas-sensitive film preparation, can solve problems such as ethanol or acetone vapor overflow, and achieve the effects of short response time, good biocompatibility and high crystallinity

Active Publication Date: 2017-11-10
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the response to ethanol or acetone is generally a response to impedance changes, and it is impossible to determine whether there is ethanol or acetone vapor overflow through macroscopic morphological changes, and so far there is no documented gas sensor that is responsive to both ethanol and acetone. Material

Method used

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  • A gas-sensitive film sensitive to ethanol and acetone and a preparing method thereof
  • A gas-sensitive film sensitive to ethanol and acetone and a preparing method thereof
  • A gas-sensitive film sensitive to ethanol and acetone and a preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation method of the gas-sensitive film sensitive to ethanol and acetone comprises the following steps:

[0030] 1) Preparation of thermoplastic polymer nanofiber suspension: PVA-co-PE nanofibers are added to the alcohol-water mixture, the alcohol-water mixture is a mixture of n-propanol and water, and the mass ratio of n-propanol to water is The ratio is 7:3, using a homogenizer to break up the nanofibers to obtain a uniformly dispersed thermoplastic polymer nanofiber suspension; the mass percent concentration of the thermoplastic nanofiber suspension is 0.8%;

[0031] 2) Preparation of nanocrystalline cellulose suspension: cotton is added to 60wt% sulfuric acid solution to carry out acid hydrolysis of cotton, the mass ratio of cotton and 60wt% sulfuric acid solution is 1:8, and the temperature of acid hydrolysis reaction is 45 ℃, the time is 30min, after the reaction is completed, the reaction solution is centrifuged and washed with pure water, then dialyzed ...

Embodiment 2

[0036] The preparation method of the gas-sensitive film sensitive to ethanol and acetone comprises the following steps:

[0037] 1) Preparation of thermoplastic polymer nanofiber suspension: add PA nanofibers to the alcohol-water mixture, the alcohol-water mixture is a mixture of isopropanol and water, and the mass ratio of isopropanol to water is 6:4 Using a homogenizer to disperse the nanofibers to obtain a uniformly dispersed thermoplastic polymer nanofiber suspension; the mass percent concentration of the thermoplastic nanofiber suspension is 1%;

[0038] 2) Preparation of nano-microcrystalline cellulose suspension: join wood pulp in 62wt% sulfuric acid solution to carry out acid hydrolysis reaction to wood pulp, the mass ratio of wood pulp and 62wt% sulfuric acid solution is 1:8.75, the acid hydrolysis reaction The temperature is 47°C, and the time is 35 minutes. After the reaction is completed, the reaction solution is centrifuged and washed with pure water, then dialyze...

Embodiment 3

[0044] The preparation method of the gas-sensitive film sensitive to ethanol and acetone comprises the following steps:

[0045] 1) Preparation of thermoplastic polymer nanofiber suspension: Add PET nanofibers to the alcohol-water mixture, the alcohol-water mixture is a mixture of n-butanol and water, and the mass ratio of n-butanol to water is 5:5 Using a homogenizer to break up the nanofibers to obtain a uniformly dispersed thermoplastic polymer nanofiber suspension; the mass percent concentration of the thermoplastic nanofiber suspension is 3%;

[0046] 2) prepare nano-microcrystalline cellulose suspension: sisal is added in the sulfuric acid solution of 65wt% and sisal is carried out acid hydrolysis reaction, the mass ratio of sisal and the sulfuric acid solution of 65wt% is 1:9, the acid hydrolysis reaction The temperature is 50°C, and the time is 40 minutes. After the reaction is completed, the reaction solution is centrifuged and washed with pure water, then dialyzed wi...

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Abstract

The invention relates to the field of gas-sensitive film preparation, and particularly relates to a gas-sensitive film sensitive to ethanol and acetone and a preparing method thereof. The method includes firstly coating a substrate with a thermoplastic polymer nanometer fibrous suspension, drying the substrate to form a thermoplastic polymer film on the surface of the substrate, tearing off the thermoplastic polymer film from the substrate, preparing a nano-microcrystalline cellulose suspension through hydrolyzing cellulose with an acid, coating the thermoplastic polymer film with the nano-microcrystalline cellulose suspension, and drying the product to obtain the gas-sensitive film. Whether ethanol vapor or acetone vapor overflows or not can be determined through macroscopic morphologic changes of the prepared gas-sensitive film, and the prepared gas-sensitive film can response to ethanol vapor and acetone vapor.

Description

technical field [0001] The invention relates to the field of preparation of gas-sensitive thin films, in particular to a gas-sensitive thin film sensitive to ethanol and acetone and a preparation method thereof. Background technique [0002] Leakage of volatile solvents often occurs in the laboratory, especially for solvents with relatively simple packaging. The volatile solvents often evaporate into the air due to damaged lids, which not only wastes solvents, but also seriously affects the health of laboratory operators. . The common volatile solvents in the laboratory are ethanol and acetone. The gaseous acetone is a mildly harmful pollutant and will do some damage to the human nervous system. Since tiny cracks in the lid are not easy to be noticed, if a gas-sensitive material that can respond to both ethanol and acetone can be installed on the solvent bottle cap of ethanol or acetone, the presence or absence can be quickly judged through the shape change of the gas-sensi...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J5/18B05D1/00C08L29/02C08L77/00C08L67/02C08L75/04C08L1/04
CPCB05D1/00C08J5/18C08J7/0427C08J2329/02C08J2367/02C08J2375/04C08J2377/00C08J2401/04
Inventor 王栋朱青王文钟卫兵金玉霞
Owner WUHAN TEXTILE UNIV
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