High-thermal-conductive moisture permeable film and preparation method thereof

A technology of moisture-permeable membrane and high thermal conductivity, which is applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc. It can solve the problem of low thermal conductivity of dehumidification membrane, inability to guarantee high heat recovery, low efficiency of total heat recovery, etc. problems, to achieve the effects of easy operation, energy-saving preparation process, and high thermal conductivity

Inactive Publication Date: 2013-07-10
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the biggest disadvantage of the existing dehumidification membrane (moisture permeable membrane) is that the thermal conductivity is very small, high heat recovery cannot be guaranteed when the high selectivity of the membrane is ensured, that is, the total heat recovery efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1g of carbon nanotube filler and 9g of polyvinylidene fluoride powder were dissolved in 100ml of N,N-dimethylformamide, heated and stirred at 50°C for 5 hours, and then vibrated at 120W ultrasonic power for 30 minutes. Apply the solution on a clean glass plate, use a scraper to control the thickness of the film to 150um, and immediately put it into a gel bath to form a film by wet method. The gel medium used is 2-4wt% isopropanol aqueous solution. After 8 minutes, the film was peeled off from the glass plate and placed in pure water for 48 hours to remove the solvent. The film after solvent removal was flattened with a glass plate, and dried at 60°C for 4 hours to obtain a high thermal conductivity and moisture permeable film.

[0030] In the formed film, the mass content of the high thermal conductivity filler is 10%. The DRPL-I thermal conductivity measuring instrument was used to test the thermal properties of the samples. In addition, as a comparative example, the ...

Embodiment 2

[0032] 1 g of graphene filler and 9 g of modified polyvinylidene fluoride powder were dissolved in 100 ml of N,N-dimethylformamide, heated and stirred at 60°C for 4 hours, and then vibrated at 120 W ultrasonic power for 30 minutes. Apply the solution on a clean glass plate, use a scraper to control the thickness of the film to 150um, and immediately put it into a gel bath to form a wet film. The gel medium used is water. After 8 minutes, the film was peeled off from the glass plate and placed in pure water for 48 hours to remove the solvent. The film after solvent removal was flattened with a glass plate, and dried at 60°C for 4 hours to obtain a high thermal conductivity and moisture permeable film.

[0033] In the formed film, the mass content of the high thermal conductivity filler is 10%. The DRPL-I thermal conductivity measuring instrument was used to test the thermal properties of the samples. In addition, as a comparative example, the same method was used to prepare a ...

Embodiment 3

[0035] Dissolve 0.1g of aluminum nitride filler and 10g of polyethylene glycol powder in 100ml of N,N-dimethylacetamide, heat and stir at 10°C for 2 hours, and then vibrate for 40 minutes under 80W ultrasonic power. Spread the non-woven fabric on a glass plate, then apply the solution on the non-woven fabric, and use a mechanical applicator to control the thickness of the film to 250um. The film formed after the solvent is naturally volatilized is placed in a hot air drying oven and the temperature is adjusted to 80°C for further drying for 2 hours. After drying, it becomes a high thermal conductivity and moisture permeable film.

[0036] In the formed film, the mass content of the high thermal conductivity filler is 1%. The DRPL-I thermal conductivity measuring instrument was used to test the thermal properties of the samples. In addition, as a comparative example, the same method was used to prepare a moisture-permeable film without high thermal conductivity fillers. The re...

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Abstract

The invention discloses a high-thermal-conductive moisture permeable film and a preparation method of the high-thermal-conductive moisture permeable film. The high-thermal-conductive moisture permeable film comprises a film base material and a high-thermal-conductive filler, wherein the high-thermal-conductive filler accounts for 1-10wt% of the total weight of the film base material and the high-thermal-conductive filler, and the film base material is as balance. The preparation method of the high-thermal-conductive moisture permeable film comprises the following steps of 1. casting liquid preparation: dissolving the film base material and the high-thermal-conductive filler into corresponding solvents according to the proportion to prepare the casting liquid, heating, and uniformly stirring through ultrasonic shaking for spare; 2. film preparation with a dry method: performing film wiping treatment on the casting liquid, wherein the thickness of the film is controlled to be 150-250mum, placing the film in the air for 24 hours to enable the solvent to volatilize naturally; or film preparation with a wet method: performing film wiping treatment on the casting liquid, wherein the thickness of the film is controlled to be 150-250mum, and then placing the film into a coagulation bath for film formation with the wet method, taking the film out after 5-10 minutes, placing the film into purified water and standing for 30-50 hours to remove the solvent, and then drying. The high-thermal-conductive moisture permeable film has high thermal conductive coefficient, and has high total heat recovery efficiency while having high selectivity.

Description

technical field [0001] The invention relates to the field of air dehumidification, in particular to a high thermal conductivity moisture-permeable film and a preparation method thereof. Background technique [0002] With the energy crisis and people's requirements for air quality, improving energy efficiency and improving air quality has become the focus of attention. Increasing the fresh air volume is the most commonly used method to improve indoor air quality. However, the energy consumption of dealing with fresh air accounts for 30-40% of the total energy consumption of air conditioners. In the hot and humid summer in southern my country, the energy consumption is even greater . In order to save energy more effectively, recently air-conditioning researchers have been seeking a heat and moisture recovery process with low energy consumption. Membrane heat and moisture recovery and dehumidification have aroused great interest due to the advantages of no corrosion, high sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L79/08C08L27/16C08L27/22C08L71/08C08K7/00C08K3/04C08K3/38C08K3/34C08K7/24C08J5/18
CPCY02P20/50
Inventor 梁才航王小见杨永旺
Owner GUILIN UNIV OF ELECTRONIC TECH
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