Bionic water-collecting composite electrospun film and its preparation method and use

An electrospinning and film technology, applied in water supply installations, drinking water installations, buildings, etc., can solve the problems of inability to meet the needs of water, low water collection efficiency, and high costs, and achieve improved efficiency, good outdoor stability, and extended The effect of age

Inactive Publication Date: 2006-12-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the prior art that the water collection efficiency is not high, cannot meet the water needs of the vast water-shortage areas, and the cost is high, and it is not environmentally friendly, and provides a film with hydrophilic regions and hydrophobic regions structure, can efficiently collect tiny water droplets in the air to make it usable fresh water, and can defog the biomimetic water-collecting composite electrospun film

Method used

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  • Bionic water-collecting composite electrospun film and its preparation method and use
  • Bionic water-collecting composite electrospun film and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0060] 1) Preparation of hydrophobic polymer solution:

[0061] Slowly add 10 parts by weight of polystyrene and 2 parts by weight of silicon dioxide with an average particle size of 100 nm into 90 parts by weight of dimethyl-formamide under stirring. After fully swelling, stir at constant temperature for 2 hours until the polystyrene Ethylene was completely dissolved; then the solution was allowed to stand for 12 hours until the bubbles in the solution disappeared to obtain a hydrophobic polymer solution;

[0062] 2) Preparation of hydrophilic polymer solution:

[0063] Slowly add 15 parts by weight of polyvinyl alcohol and 3 parts by weight of titanium dioxide particles with an average particle size of 100 μm into 85 parts by weight of secondary water deionized water under stirring. After fully swelling, heat up to 80 ° C and stir at constant temperature for 2 hours Continue to stir for 2 hours at room temperature until the polyvinyl alcohol is completely dissolved; then le...

Embodiment 2

[0071] 1) Preparation of hydrophobic polymer solution:

[0072] Slowly add 10 parts by weight of polystyrene and 3 parts by weight of silicon dioxide with an average particle size of 2nm to 90 parts by weight of dimethyl-formamide under stirring. After fully swelling, stir at constant temperature for 2 hours until the polystyrene Ethylene was completely dissolved; then the solution was allowed to stand for 12 hours until the bubbles in the solution disappeared to obtain a hydrophobic polymer solution;

[0073] 2) Preparation of hydrophilic polymer solution:

[0074] Slowly add 15 parts by weight of polyvinyl alcohol and 7.5 parts by weight of titanium dioxide particles with an average particle size of 1 μm into 85 parts by weight of secondary water deionized water under stirring. After fully swelling, heat up to 80 ° C and stir at constant temperature for 2 hours Continue to stir for 2 hours at room temperature until the polyvinyl alcohol is completely dissolved; then let the...

Embodiment 3

[0082] 1) Preparation of hydrophobic polymer solution:

[0083] 10 parts by weight of polystyrene, 2.5 parts by weight of silicon dioxide with an average particle diameter of 50 nm, and 0.05 parts by weight of ultraviolet absorber 2-cyano-3,3-diphenylacrylate 2-ethylhexyl Slowly added to 90 parts by weight of dimethyl-formamide, fully swelled, stirred at constant temperature for 2 hours until the polystyrene was completely dissolved; then left the solution for 12 hours, until the bubbles in the solution disappeared, and obtained a hydrophobic polymer solution;

[0084] 2) Preparation of hydrophilic polymer solution:

[0085] Slowly add 15 parts by weight of polyvinyl alcohol and 1.5 parts by weight of titanium dioxide particles with an average particle size of 50 μm into 85 parts by weight of secondary water deionized water under stirring. After fully swelling, heat up to 80 ° C and stir at constant temperature for 2 hours Continue to stir for 2 hours at room temperature unt...

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Abstract

The invention relates to a bionic water collect composite film, which comprises a base with many round micro hydrophilic polymer projections on its above hydrophobic polymer film; said hydrophobic polymer is the polystyrene that doped with 20-30wt% silica dioxide whose average diameter is 2-100nm; the hydrophilic polymer is the polymer of amido, hydroxyl or carboxyl doped with 10-70wt% titania whose average diameter 1-100micrometer; the hydrophobic polymer film comprises one or several of ultraviolet stabilizer, ultraviolet absorber, ozone stabilizer, and antioxidant. The inventive film can collect fog drop or disperse dense fog. The invention has high water collecting efficiency, long service life, and better hydrophilic/ hydrophobic property.

Description

technical field [0001] The invention relates to a bionic water-collecting composite electrospun film, its preparation method and application. Background technique [0002] Dense fog is a kind of meteorological disaster. It not only brings inconvenience to people's travel, but sometimes even causes loss of life and property. Therefore, researches on low-cost artificial fog removal have been carried out abroad. On the other hand, with the global warming and the rapid increase of population, the problem of water shortage has become more and more prominent. For example, in our country, due to the diversity of geography and climate, many areas of our country are in a state of water shortage for a long time, which greatly restricts the local economic development, especially the development of the western region. Recently, a new technical system - "foggy water engineering" is quietly emerging in some countries and regions of the world. The method of "catching fog and water" can r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B3/28B29B7/00B29C47/00
Inventor 黄忠兵江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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