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A kind of elastic heterochain polymer-based lower ester gas sensitive material and preparation method thereof

A gas-sensitive material and a gas-sensitive material technology, which are applied in the field of elastic heterochain polymer-based ethyl acetate gas-sensitive materials and their preparation, and can solve the problems that threaten the reliability of the gas-sensitive sensor, its stability against environmental gases, and its weak ability to interfere with external forces. and other problems, to achieve the effect of good resistance to external force damage and high gas sensitivity responsiveness

Active Publication Date: 2022-05-27
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of the stability of conductive polymer-based gas-sensing composite materials, especially the relatively weak ability to resist environmental gases and external force interference, which seriously threatens the reliability of gas-sensing sensors under some complex environments and external force conditions, this application proposes An elastic heterochain polymer-based low-level ester gas-sensitive material and a preparation method thereof, which have the advantages of simple preparation method and low equipment requirements, and use fluorosilicone heterochain polymer as the matrix, and the material has the advantages of good environmental resistance and external force interference

Method used

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  • A kind of elastic heterochain polymer-based lower ester gas sensitive material and preparation method thereof
  • A kind of elastic heterochain polymer-based lower ester gas sensitive material and preparation method thereof
  • A kind of elastic heterochain polymer-based lower ester gas sensitive material and preparation method thereof

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Effect test

Embodiment 1

[0043](1) Preparation of nano-carbon fiber / short-chain perfluorinated silicone oil blend: nano-carbon fiber was added to the ethyl acetate solvent, and the suspension was obtained by ultrasonic dispersion for 15 minutes; the viscosity was selected as 1×10 5 mPa.s vinyl short-chain perfluorosilicate silicone oil, according to the ratio of 1:1.1 to the hydrogen molar ratio of vinyl and hydrogen-containing silicone oil in silicone oil, calculated by adding crosslinking agent hydrogen-containing silicone oil (viscosity of 60mPa.s, hydrogen content of 0.75wt%), adding platinum catalyst (platinum dosage of 12ppm), 2-methyl-3-butyne-2-alcohol as an inhibitor, adding an amount of 1wt of silicone oil mass, adding 4 times the volume of ethyl acetate solvent dilution, it is blended with the above nanocarbon fiber suspension, After further sonication for 15min, mechanical stirring of 1500rpm, 30min, 3000rpm, 30min, to obtain a nanocarbon fiber / perfluorolic silicone blend prepolymer with goo...

Embodiment 2

[0046] (1)) Preparation of nano-carbon fiber / perfluoro silicone oil / long-chain fluorine silicone oil blend: Nanocarbon fibers were added to the solvent of ethyl acetate, and the suspension was obtained by sonic dispersion for 15 minutes; the viscosity was selected as 1×10 4 mPa.s vinyl short-chain perfluorosilicate silicone oil with viscosity 1×10 5mPa.s side group containing perfluorodecyl vinyl fluorosilicone (side group containing perfluorodecyl vinyl fluorosilicone oil dosage of 20wt% of the total amount of silicone oil), according to the vinyl in silicone oil and hydrogen-containing silicone oil hydrogen molar ratio 1:1.05 added crosslinker side group containing trifluoropropyl functional group hydrogen-containing silicone oil (viscosity of 60mPa.s, hydrogen content of 0.75wt%; fluorine-containing chain segment proportion of 50%), add platinum catalyst (platinum dosage of 15ppm), 2- Methyl-3-butyn-2-alcohol as an inhibitor, the amount of addition is 1.1wt of the quality of si...

Embodiment 3

[0049] (1) Carbon black first acidification treatment: the carbon black is placed in a sulfuric acid with a concentration of 10 mol / L, heated to 50 °C reflux for 5h acidification, a large amount of deionized water washed to neutral - dried, to obtain a nano carbon black with hydroxyl and carboxyl functional groups for backup. The above acidified nano-carbon black is added to ethanol, ultrasonic dispersion, and then adjust the pH value to weak alkaline (PH value is about 9) or weak acidicity (PH value in 3.5-4.5) after transfer to the three-mouth flask; then configure the ethanol solution containing the fluorosilane coupling agent, under the reflux stirring at 60 °C, the ethanol solution containing the fluorosilane coupling agent is added dropwise to the nano carbon black / ethanol solution, the mass ratio of carbon black and the fluorosilane-containing coupling agent is 1:1, after reflux for 24h, the filtration is extracted, and the unreacted silane is removed by ethanol washing, ...

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Abstract

The invention relates to the technical field of composite materials. In order to solve the problem of the stability of conductive polymer-based gas-sensing composite materials, especially the relatively weak ability to resist environmental gas and external force interference, which seriously threatens gas-sensing sensors under some complex environments and external force conditions In order to solve the reliability problem, this application proposes an elastic heterochain polymer-based low-level ester gas-sensitive material and its preparation method. The gas-sensitive material components include conductive particles, elastic fluorine-containing silicone materials, and are in the form of a film or have a through-hole structure. flaky. The method has the advantages of simple preparation method, low requirement on equipment, fluorine-silicon heterochain polymer as the matrix, and the material has the advantages of anti-environment and good interference by external force.

Description

Technical field [0001] The present invention relates to the field of composite material technology, specifically to an elastic heterochain polymer ethyl acetate gas sensitive material and a preparation method thereof. Background [0002] Esters with less than 8 carbon atoms are generally called low-grade esters, which are an important organic chemical raw materials and industrial solvents, and are widely used in coatings, adhesives, colorants, textiles, fragrances and other fields. However, low-grade esters are extremely volatile, not only polluting the environment, but also easy to form explosive mixtures with air. For example, when ethyl acetate leaks into the air to reach a certain concentration (2.2% to 11.5vol%), it is easy to explode when it encounters an open fire, which seriously threatens the safety of life and property. Therefore, it is of great significance to develop low-grade ester gas-sensitive materials with high sensitivity, good repeatability, environmental resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08L83/05C08K7/06C08K9/06C08K9/02C08K3/04C08J5/18G01N27/12
CPCC08J5/18G01N27/126G01N27/127C08J2383/08C08J2483/05C08J2483/08C08K7/06C08K9/06C08K9/02C08K3/04C08K3/041C08K3/042C08K2201/011
Inventor 赵丽吴煜煕黄韵卓汤龙程龚丽秀张国栋
Owner HANGZHOU NORMAL UNIVERSITY
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