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Hydrogel evaporation film, preparation method and applications thereof

A hydrogel film and hydrogel technology are applied in general water supply conservation, chemical instruments and methods, seawater treatment, etc., which can solve the problem of low carbon evaporation film efficiency, achieve high light absorption rate, and improve evaporation efficiency.

Inactive Publication Date: 2020-05-19
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the efficiency of the existing carbon evaporation film is lower than the natural sunlight power density (not greater than 1kW / m2) due to its hydrophobicity. 2 ) is still not high

Method used

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  • Hydrogel evaporation film, preparation method and applications thereof
  • Hydrogel evaporation film, preparation method and applications thereof
  • Hydrogel evaporation film, preparation method and applications thereof

Examples

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Embodiment approach

[0041] In a typical implementation of the present invention, 25 mg of graphene oxide, 50 mg of sodium alginate, 100 mg of ascorbic acid and 5 mL of deionized water are mixed, spread on a fast filter paper with a diameter of 6 cm, and left to react overnight. Then drop 2% calcium chloride solution to cross-link and solidify, and a black hydrogel film with a thickness of about 0.5 mm can be formed on the filter paper. Or mix 25mg of graphene oxide, 50mg of sodium alginate and 5mL of deionized water first, spread it flat on a fast filter paper with a diameter of 6cm, drop in 2% calcium chloride solution to cross-link and solidify, and then in 1%-2% ascorbic acid solution Heat and react at 95 degrees Celsius for 1 hour, and a black hydrogel film with a thickness of about 0.5 mm can be formed on the filter paper. Its internal structure is as figure 1 As shown in Figure I, sheet-like graphene 1 is evenly dispersed in hydrogel 2, and a large number of micron-sized water droplets are...

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Abstract

The invention discloses a hydrogel evaporation film, a preparation method and applications thereof. The hydrogel evaporation film comprises a hydrogel film matrix and carbon light absorption materials, wherein the carbon light absorption materials are uniformly distributed in the hydrogel film matrix, the light-absorbing carbon particles are uniformly dispersed in the hydrogel, and have a light absorptivity of more than 90% in the range from visible light to infrared light, the hydrogel has naturally formed multi-stage micro-nano holes, water is wrapped in the hydrogel to form pore channels communicated with one another, and the water can be conveyed from the bottom of the film to the evaporation side receiving sunlight.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a hydrogel evaporation membrane and a preparation method and application thereof, which can efficiently convert sunlight for evaporating water and realize seawater desalination. Background technique [0002] There are two main types of commercial seawater desalination technologies: distillation and reverse osmosis membrane. The fresh water prepared by distillation is of high quality, but it consumes a lot of energy, the equipment is complex, and the production cost is high. Only in areas with abundant energy can fresh water be produced at a relatively low cost. The reverse osmosis membrane method uses the membrane to intercept salt to realize the desalination of seawater. Its production cost is lower than that of the distillation method, but the quality of fresh water produced through the reverse osmosis membrane is not as good as that of the distillatio...

Claims

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Application Information

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IPC IPC(8): C02F1/14C09K3/00C02F103/08
CPCC02F1/14C02F2103/08C09K3/00Y02A20/124Y02A20/142Y02A20/212
Inventor 楼刚寇建龙金林枫吴锋民方允樟谢章叶慧群
Owner ZHEJIANG NORMAL UNIVERSITY
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