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Total heat exchange membrane and preparation method thereof

A technology of total heat exchange membrane and total heat exchange core, which is applied in the field of polymer composite materials, can solve the problems of substrate defects, decline in mechanical properties, and influence of water molecules permeating the membrane, so as to achieve high mechanical strength and improve display efficiency. The effect of heat exchange capacity

Active Publication Date: 2017-03-22
中安瑞材(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (1) The heat-conducting filler is evenly compounded with the base material. Although the sensible heat exchange efficiency is improved, the heat-conducting filler will block the micropores and affect the penetration of water molecules through the membrane, which will reduce the latent heat exchange efficiency.
[0013] (2) When the amount of thermally conductive filler used is small, a skeleton or network cannot be formed in the base material, and the thermal conductivity is limited; while when the amount of thermally conductive filler used is large, there are more defects in the base material, which greatly reduces the mechanical properties and severely limits the life of the film.

Method used

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  • Total heat exchange membrane and preparation method thereof
  • Total heat exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The total heat exchange membrane of Example 1 was prepared by the following steps, which included:

[0052] (1) Adopting the viscose fiber containing 5wt.% graphene as raw material, processed into a grammage of 35g / m 2 , non-woven fabric with a thickness of 260 μm;

[0053] (2) Take 10g of polyvinyl alcohol, add 100ml of water and keep at 90°C for 2 hours to dissolve; then add 0.05g of calcium chloride, 0.05g of calcium hydroxide and 0.1g of polyethylene glycol-2000, keep warm at 70°C and continue Stir for 2 hours until the additives are evenly dispersed, then let stand for 12 hours for defoaming;

[0054] (3) Apply the mixture obtained in step (2) evenly on the surface of the non-woven fabric, and keep it dry for 8 hours in an air-blast drying oven at 80° C. to obtain a total heat exchange membrane.

[0055] The above-mentioned total heat exchange membrane is tested for water vapor transmission rate, and the test method is based on the national standard GB1037-88. U...

Embodiment 2

[0058] (1) Adopting the hydrophilic acrylic fiber containing 20wt.% graphite as raw material, processed into a gram weight of 50g / m 2 , non-woven fabric with a thickness of 350 μm;

[0059] (2) Take 20g of polyvinylpyrrolidone, add 150ml of N-methylpyrrolidone and keep it sealed at 60°C for 4 hours to dissolve; then add 0.2g of magnesium chloride, 0.1g of aluminum hydroxide and 0.1g of polyethylene glycol-2000, and keep warm for 40 Continue to stir for 8 hours at ℃ until the additives are evenly dispersed; then stand for 12 hours for defoaming;

[0060] (3) Apply the mixture obtained in step (2) evenly on the surface of the non-woven fabric, and keep it dry in a blast drying oven at 60° C. for 12 hours; a total heat exchange membrane is obtained.

[0061] The water vapor transmission rate test was carried out on the above-mentioned total heat exchange membrane, the conditions were the same as in Example 1, and the water vapor transmission rate obtained in 24 hours was 492.0g / ...

Embodiment 3

[0064] (1) Adopting the viscose fiber containing 20wt.% graphite as raw material, processed into a gram weight of 45g / m 2 , non-woven fabric with a thickness of 300 μm;

[0065] (2) Take 20g of polyacrylic acid, add 80ml of ethanol and keep it sealed at 40°C for 2 hours to dissolve; then add 0.05g of magnesium chloride, 0.1g of sodium pyrrolidone hydroxy acid, 0.1g of ammonium bromide and 0.2g of polyethylene glycol-2000, Insulate at 40°C and continue to stir for 12 hours until the additives are evenly dispersed; then stand for 12 hours for defoaming;

[0066] (3) Apply the mixture obtained in step (2) evenly on the surface of the non-woven fabric, and keep it dry for 6 hours in an air blast drying oven at 80° C. to obtain a total heat exchange membrane.

[0067] The water vapor transmission rate test was carried out on the above-mentioned total heat exchange membrane, the conditions were the same as in Example 1, and the water vapor transmission rate obtained in 24 hours was...

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Abstract

The invention provides a total heat exchange membrane and a preparation method thereof, and also provides a total heat exchange core, a total heat exchanger and an air-handling unit. The total heat exchange membrane includes a heat conduction hydrophilic porous structure membrane and a hydrophilic polymer composite material coated on the heat conduction hydrophilic porous structure membrane, wherein the heat conduction hydrophilic porous structure membrane is mainly prepared from heat conduction hydrophilic composite fiber by nonwoven fabric process or lamination process, the heat conduction hydrophilic composite fiber includes hydrophilic fiber and high thermally conductive filler, and the hydrophilic polymer composite material comprises a hydrophilic high polymer material and filler. The total heat exchange membrane provided by the invention utilizes heat conduction hydrophilic fiber network as the substrate or skeleton of the total heat exchange membrane, and the substrate or skeleton is coated with the hydrophilic polymer composite material, thus improving the moisture permeability and heat conductivity of the total heat exchange membrane.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to hydrophilic and high thermal conductivity composite materials, specifically a total heat exchange membrane and a preparation method thereof, and also relates to a total heat exchange membrane comprising the total heat exchange membrane Core, a total heat exchanger including a total heat exchange core and an air handling unit including a total heat exchange core. Background technique [0002] With people's requirements for air quality and the development of passive building technology, improving energy efficiency and improving air quality has become one of the focuses in the field of green buildings. During the use of fresh air fans, the energy consumption of fresh air treatment often accounts for more than 30% of the total energy consumption of air conditioners. The fresh air ventilation device technology has been greatly improved in recent years, and it generally perf...

Claims

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Application Information

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IPC IPC(8): D06N3/00D06N3/04F28D21/00F24F13/30
CPCD06N3/0011D06N3/0034D06N3/0036D06N3/0059D06N3/0063D06N3/042D06N3/045D06N2201/02D06N2201/0254D06N2201/042D06N2209/06D06N2209/067D06N2209/141F24F13/30F28D21/0015Y02P70/62
Inventor 袁征宋波李艳杰
Owner 中安瑞材(北京)科技有限公司
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