Passive humidity control organic-inorganic composite film and preparation method thereof

An inorganic composite membrane, passive technology, applied in the field of air dehumidification, can solve problems such as energy consumption, and achieve the effect of improving quality, stable performance and convenient use

Inactive Publication Date: 2018-12-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the dehumidification of the air conditioner needs to reduce the indoor air to the dew point temperature, so that the

Method used

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  • Passive humidity control organic-inorganic composite film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Take 200ml of deionized water, and dissolve 10 parts of polyvinyl alcohol in deionized water at room temperature. After the polyvinyl alcohol is completely dispersed, the solution is heated while stirring, and the heating temperature is 90°C. After the polyvinyl alcohol is completely dissolved, the temperature drops to 30°C. Add 1 part of oxalic acid, 1 part of calcium chloride, and 1 part of chrome yellow into the polyvinyl alcohol solution, and stir while heating until the mixture is uniform. The casting solution was placed in a vacuum oven with a temperature of 30° C. and a vacuum of 50 Pa for 2 hours of vacuum degassing. Then put the casting solution after evacuation in a reagent bottle and place it under room temperature for 1 hour for defoaming for later use. Subsequently, the casting solution is manually coated on the metal plate, and then the metal plate coated with the casting solution is placed in a constant temperature and humidity box, the temperature is set...

Embodiment 2

[0028] Take 200ml of deionized water, and dissolve 15 parts of polyvinyl alcohol in deionized water at room temperature. After the polyvinyl alcohol is completely dispersed, the solution is heated while stirring, and the heating temperature is 93°C. After the polyvinyl alcohol is completely dissolved, the temperature drops to 42°C. Add 5 parts of boric acid, 5 parts of sodium chloride, and 5 parts of iron oxide yellow into the polyvinyl alcohol solution, and stir while heating until they are evenly mixed. The casting solution was placed in a vacuum oven with a temperature of 45° C. and a vacuum degree of 75 Pa for 1.25 hours of vacuum degassing. Then put the vacuumized casting solution in a reagent bottle and leave it at room temperature for 5.5 hours for degassing for later use. Then use a laboratory small-scale coating machine to coat the casting solution on the metal plate, and then place the metal plate coated with the casting solution in a constant temperature and humidit...

Embodiment 3

[0031] Take 200ml of deionized water, and dissolve 20 parts of polyvinyl alcohol in deionized water at room temperature. After the polyvinyl alcohol is completely dispersed, the solution is heated while stirring, and the heating temperature is 95°C. After the polyvinyl alcohol is completely dissolved, the temperature drops to 55°C. Add 10 parts of citric acid, 10 parts of lithium chloride, and 10 parts of iron oxide green into the polyvinyl alcohol solution, and stir while heating until they are evenly mixed. The casting solution was placed in a vacuum oven with a temperature of 60° C. and a vacuum of 100 Pa for 0.5 hours of vacuum degassing. Then put the vacuumized casting solution in a beaker and seal the mouth of the beaker with a plastic wrap and place it at room temperature for 10 hours for degassing for later use. Subsequently, the casting solution is manually coated on a glass plate, and then the glass plate coated with the casting solution is placed in a constant tempe...

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Abstract

The invention discloses a preparation method of a passive humidity control organic-inorganic composite film, and the method is as follows: dissolving polyvinyl alcohol, a metal chloride, a cross-linking agent and a pigment in deionized water to prepare a film casting liquid, defoaming the film casting liquid, applying the defoamed film casting liquid to a plate, and placing the plate in a constanttemperature and humidity box to promote evaporation of water in the film casting liquid to prepare an organic-inorganic composite film; and finally placing the composite film in an oven for heat treatment to promote cross-linking reaction between the polyvinyl alcohol and the cross-linking agent. The composite film is mainly based on the polyvinyl alcohol and the metal chloride to realize intelligent regulation of the humidity of a closed space, the cross-linking agent is used to enhance the water resistance of the film, and the pigment is used for regulating the color of the film to achievethe purpose of decoration. Compared with the prior art, the composite film can realize the intelligent adjustment of the humidity of the closed space, has a stable performance, can be used repeatedly,and has a decorative function.

Description

technical field [0001] The invention belongs to the technical field of air dehumidification, and in particular relates to an organic-inorganic composite film for passive humidity control and a preparation method thereof. Background technique [0002] The air humidity of the environment is closely related to people's life and production. Appropriate environmental humidity plays a very important role in human health, product production and article preservation. Therefore, it is very important to regulate the humidity of the environment. At present, the humidity of the environment is mainly controlled by a humidity controller such as an air conditioner. However, since the dehumidification of the air conditioner needs to reduce the indoor air to the dew point temperature, so that the humid air is condensed into water and then discharged, it is very energy-consuming to use the air conditioner for dehumidification. In view of the above problems, the present invention proposes an...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D71/02B01D69/12B01D67/00B01D53/26
CPCB01D53/268B01D67/0079B01D69/12B01D71/022B01D71/38
Inventor 高颖叶宏
Owner CHANGZHOU UNIV
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