Hydrophilic and hydrophobic compound steam permeation film as well as preparation method and application thereof

A water vapor, composite technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of low latent heat exchange efficiency, increased air resistance, low water resistance, etc., to achieve good permeability and The effect of gas selectivity

Inactive Publication Date: 2011-08-17
SOUTH CHINA UNIV OF TECH +1
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat exchange membrane disclosed in Japanese Patent Laid-Open No. 7-133994 has low water resistance because the moisture-permeable resin is exposed on the surface of the heat-exchange membrane, and the moisture-permeable resin is easily washed away together with water droplets caused by condensation.
In addition, the diap

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrophilic and hydrophobic compound steam permeation film as well as preparation method and application thereof
  • Hydrophilic and hydrophobic compound steam permeation film as well as preparation method and application thereof
  • Hydrophilic and hydrophobic compound steam permeation film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0064] Example 1

[0065] 120g of pure water, add 4g of polyvinyl alcohol and 0.12g of lithium chloride, stir at 90 to 100 ° C for 1 hour to prepare a polyvinyl alcohol solution, and let the above solution stand for 24 to 36 hours to obtain a solution for forming Coating solution for hydrophilic films.

Example Embodiment

[0066] Example 2

[0067] To 100 g of pure water, add 2 g of polyvinyl alcohol and 0.10 g of lithium chloride, and stir at 90 to 100° C. for 1.5 hours to prepare a polyvinyl alcohol solution. The above solution was left to stand for 24 hours to obtain a coating liquid for forming a hydrophilic film.

Example Embodiment

[0068] Example 3

[0069] To 150 g of pure water, 15 g of polyvinyl alcohol and 0.15 g of lithium chloride were added, and the mixture was stirred at 100° C. for 2 hours to prepare a polyvinyl alcohol solution. The above solution was allowed to stand for 3 days to obtain a coating liquid for forming a hydrophilic film.

[0070] 2. Select sodium polyacrylate as the main component of the hydrophilic membrane

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Areal densityaaaaaaaaaa
Areal densityaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a hydrophilic and hydrophobic compound steam permeation film as well as a preparation method and application thereof. The hydrophilic and hydrophobic compound steam permeation film comprises a substrate layer, a hydrophobic layer and a hydrophilic layer, wherein the hydrophobic layer is coated on a first surface of the substrate layer and used for releasing the steam; the hydrophilic layer is coated on a second surface of the substrate layer and used for absorbing the steam; the hydrophilic layer integrally enters the substrate layer, so that the first surface of the hydrophilic layer and the second surface of the substrate layer are polymerized; on the boundary wherein the second surface of the hydrophilic layer is contacted with the inner part of the hydrophobic layer, an interface, which is used for releasing liquid water in the hydrophilic layer through holes on the surface of the hydrophobic layer, is formed.. The absorption of the steam in the air is promoted through coating the hydrophilic layer on one surface of the substrate layer and the evaporation of the steam is promoted through coating the hydrophobic layer on the other surface of the hydrophilic layer so that the movement speed of the steam in the steam permeation film is improved and favorable moisture-penetrability is provided.

Description

technical field [0001] The invention relates to a hydrophilic and hydrophobic composite water vapor permeable membrane, in particular to a hydrophilic and hydrophobic composite water vapor permeable membrane and its Preparation method and application. Background technique [0002] In order to create a comfortable indoor environment, an air conditioner with temperature and humidity adjustment functions has appeared. This air conditioner has a humidification function and a dehumidification function. In winter when the air is dry, it absorbs moisture from the outdoor air (atmosphere) and sends it indoors. This moisture keeps the room at a refreshing relative humidity; it dehumidifies the indoor air in seasons with high humidity such as the rainy season. Furthermore, among industrial air conditioners, there is an air conditioner capable of strict humidity control in order to maintain optimum conditions for items produced or stored indoors, machinery, and the like. In an air co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D71/48B01D69/12B01D67/00F28D9/02
Inventor 张立志裴丽霞神野亮木户照雄喜冠南
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap