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Aerogel composite thermal insulation layer as well as preparation method and application thereof

A composite thermal insulation layer and aerogel technology, applied in the field of electronic cigarettes, can solve problems such as the influence of electronic cigarettes, carbonization of smoking substrates, and interference with the normal operation of cardiac pacemakers, so as to improve the heating speed and prolong the service life. Effect

Active Publication Date: 2021-12-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the heating speed of the heating tube is too fast and the heating temperature is too high, the problem of carbonization will occur locally in the smoking substrate.
In addition, the electromagnetic waves generated

Method used

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  • Aerogel composite thermal insulation layer as well as preparation method and application thereof
  • Aerogel composite thermal insulation layer as well as preparation method and application thereof

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Effect test

preparation example Construction

[0033] The present invention also provides a method for preparing the airgel composite heat insulation layer described in the above technical solution, comprising the following steps:

[0034] The silicon dioxide airgel dispersion liquid and the Mxene material dispersion liquid are alternately coated and dried on the substrate, and then dried to obtain the airgel composite heat insulation layer.

[0035] In the preparation method provided by the present invention, the silica airgel dispersion and the Mxene material dispersion are firstly prepared. Wherein, the silica airgel dispersion liquid is made by mixing silica airgel and water, and the mixing method is preferably ultrasonic mixing; the thermal conductivity of the silica airgel is preferably 0.01-0.03W / (m·K), more preferably 0.015-0.025W / (m·K), most preferably 0.017-0.023W / (m·K); the density of the silica airgel is preferably 0.05-0.2 g / cm 3 , specifically 0.05g / cm 3 , 0.06g / cm 3 , 0.07g / cm 3 , 0.08g / cm 3 , 0.09g / c...

Embodiment 1

[0043] (1) Ti 3 C 2 Preparation of dispersion

[0044] Pour 30mL of hydrofluoric acid solution (50wt%) into the polytetrafluoroethylene beaker, start stirring, then add 3gTi 3 AlC 2 Slowly add the powder into the above hydrofluoric acid solution, keep the temperature of the reaction system at 35°C, and react for 48 hours under stirring; then perform several centrifugation and washing operations until the pH value of the supernatant reaches about 7, and the etched powder is obtained ;Finally, disperse the etched powder in deionized water, vibrate with an oscillator, briefly ultrasonicate for 20 minutes, and perform centrifugation. After centrifugation, take the supernatant, which is the Ti obtained after etching and stripping. 3 C 2 Dispersion solution, add water to prepare Ti with a concentration of 2mg / mL 3 C 2 Dispersions.

[0045] (2) Preparation of silica airgel dispersion

[0046]Add commercial silica airgel and polyvinylpyrrolidone (molecular weight is k30, purch...

Embodiment 2

[0050] (1)Nb 4 C 3 Preparation of dispersion

[0051] Pour 30mL of hydrofluoric acid solution (50wt%) into the polytetrafluoroethylene beaker, start stirring, then add 3gNb 4 AlC 3 Slowly add the powder into the above hydrofluoric acid solution, keep the temperature of the reaction system at 35°C, and react for 48 hours under stirring; then perform several centrifugation and washing operations until the pH value of the supernatant reaches about 7, and the etched powder is obtained ;Finally, disperse the etched powder in deionized water, oscillate with an oscillator, briefly sonicate for 20 minutes, and perform centrifugation. After centrifugation, take the supernatant, which is the Nb obtained after etching and stripping. 4 C 3 Dispersion solution, add water to prepare Nb with a concentration of 5mg / mL 4 C 3 Dispersions.

[0052] (2) Preparation of silica airgel dispersion

[0053] Add commercial silica airgel and polyethylene glycol (polyethylene glycol 600, purchased...

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Abstract

The invention belongs to the field of electronic cigarettes, and relates to an aerogel composite heat insulation layer as well as a preparation method and application thereof. The aerogel composite heat insulation layer provided by the invention comprises silicon dioxide aerogel layers and Mxene material layers which are alternately stacked. According to the composite thermal insulation layer provided by the invention, the silicon dioxide aerogel material and the Mxene material are combined, so that on one hand, the silicon dioxide aerogel material is utilized to endow the composite thermal insulation layer with relatively low thermal conductivity, on the other hand, the mechanical properties, namely hardness and strength, of the silicon dioxide aerogel material are made up through the Mxene material, and the service life of the composite heat insulation layer in the electronic cigarette is prolonged; and meanwhile, by means of the good wave absorbing and filtering performance of the Mxene material, the problems that a fuming matrix is carbonized at a high temperature, and peculiar smells are generated,due to the fact that the electromagnetic induction heating speed is high and efficiency is high can be solved, and specific people (wearing cardiac pacemakers, hearing aids and the like) can be effectively prevented from being interfered by electromagnetic waves when an electronic cigarette is heated through electromagnetic induction.

Description

technical field [0001] The invention belongs to the field of electronic cigarettes, and in particular relates to an airgel composite heat insulation layer and a preparation method and application thereof. Background technique [0002] With the deepening of the education on the harm of traditional tobacco, more and more smokers are constantly strengthening their health awareness and environmental protection awareness. Development direction and R&D hotspots. [0003] E-cigarettes include an atomization system, a power supply system, a detection and control system, etc., through electric heating of e-liquid, through the atomizer of the atomization system to generate smoke to achieve the purpose of smoking nicotine. Among them, the atomizer is the core component of the electronic cigarette, and the electronic cigarettes currently on the market generally use resistance heating atomizers. However, the resistance heating method has shortcomings such as too concentrated heating po...

Claims

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Application Information

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IPC IPC(8): C09D1/00A24F40/10A24F40/40A24F40/465B05D5/00B05D7/00B05D7/14B05D7/24
CPCC09D1/00B05D7/146B05D7/24B05D5/00B05D7/584A24F40/465A24F40/40A24F40/10B05D2254/02B05D2320/00
Inventor 吴长征谢毅
Owner UNIV OF SCI & TECH OF CHINA