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A polysiloxane airgel composite material for efficient water evaporation and its preparation method and application

A polysiloxane and composite material technology, which is applied in general water supply conservation, chemical instruments and methods, seawater treatment, etc., can solve the problems of low utilization rate of solar energy, inability to effectively utilize latent heat of evaporation and condensation, and complicated installation.

Active Publication Date: 2020-10-27
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot effectively utilize the latent heat of evaporation and condensation
Thereby the utilization rate of solar energy is relatively low, more importantly, this device is more complicated and is unfavorable for promoting

Method used

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  • A polysiloxane airgel composite material for efficient water evaporation and its preparation method and application
  • A polysiloxane airgel composite material for efficient water evaporation and its preparation method and application
  • A polysiloxane airgel composite material for efficient water evaporation and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 1 ml tetraethyl silicate, 1 ml deionized water, and 10 ml ethanol evenly, then add 1M ammonia water to adjust the pH of the above mixed solution to 7.5; then soak the commercially available hydrophobic polysiloxane airgel in the above solution, after soaking fully, at 60~120 o C drying for 20-30 hours to obtain hydrophilic polysiloxane airgel.

[0039] Cesium-doped tungsten trioxide nano-powder, water, polypropylene resin, dispersant BYK358N and UV absorber BYK1130 are configured as a resin slurry with a solid content of 0.9%; cesium-doped tungsten trioxide nano-powder, water, polypropylene The mass ratio of acrylic resin, dispersant BYK358N and UV absorber BYK1130 is 0.1:6:4:0.05:1. After stirring the prepared slurry evenly, store it away from light.

[0040] Immerse the hydrophilic modified polysiloxane airgel in the resin slurry, after fully adsorbed, at 40~120 oC drying for 1~4h, the polysiloxane airgel composite material for high-efficiency water evaporation...

Embodiment 2

[0042] Put the airgel in a tube furnace, firstly vacuumize and then feed nitrogen, the heating rate is 2°C / min, and the temperature is kept at 800°C for 2h to obtain the hydrophilic polysiloxane airgel.

[0043] Cesium-doped tungsten trioxide nanopowder, water, polypropylene resin, dispersant BYK358N and UV absorber BYK1130 are configured as a resin slurry with a solid content of 1.2%; cesium-doped tungsten trioxide nanopowder, water, polypropylene The mass ratio of acrylic resin, dispersant BYK358N and UV absorber BYK1130 is 0.1:4:3:0.01:1. After stirring the prepared slurry evenly, store it away from light.

[0044] Immerse the hydrophilic modified polysiloxane airgel in the resin slurry, after fully adsorbed, at 40~120 o C drying for 1~4h, the polysiloxane airgel composite material for high-efficiency water evaporation can be obtained.

Embodiment 3

[0046] Mix 1 ml tetraethyl silicate, 1 ml deionized water, and 10 ml ethanol evenly, then add 1.2M ammonia water to adjust the pH of the above mixed solution to 10; then soak the commercially available hydrophobic polysiloxane airgel in In the above solution, after fully soaking, at 60~120 o C drying for 20-30 hours to obtain hydrophilic polysiloxane airgel.

[0047] Cesium-doped tungsten trioxide nanopowder, water, polypropylene resin, dispersant BYK358N and UV absorber BYK1130 were configured as a resin slurry with a solid content of 2.4%; cesium-doped tungsten trioxide nanopowder, water, polypropylene The mass ratio of acrylic resin, dispersant BYK358N and UV absorber BYK1130 is 0.2:4:3:0.01:1. After stirring the prepared slurry evenly, store it away from light.

[0048] Immerse the hydrophilic modified polysiloxane airgel in the resin slurry, after fully adsorbed, at 40~120 o C drying for 1~4h, the polysiloxane airgel composite material for high-efficiency water evapora...

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Abstract

The invention discloses a polysiloxane aerogel composite material for efficient water evaporation. The polysiloxane aerogel composite material uses cerium-doped nano-powder as supporting powder and hydrophilic polysiloxane aerogel as a supporting carrier, and a cerium-doped nano-powder is an efficient photothermal conversion material. The hydrophilically modified polysiloxane aerogel has unique structural characteristics, substrate loading can be easily realized, meanwhile, the aerogel has the advantages that the thermal conductivity is low and a 3D porous structure is realized and the salt are not prone to being enriched and crystallized, the rapid passing of water vapor is realized, and the characteristics of efficient light absorption, light conversion, water transport and water evaporation are achieved. The invention further discloses a preparation method of the polysiloxane aerogel composite material for efficient water evaporation and application of the material in seawater desalination or industrial sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of water evaporation by utilizing solar energy, and relates to a photothermal material, in particular to a polysiloxane airgel composite material for high-efficiency water evaporation and its preparation method and application. Background technique [0002] The total water stored on the earth is about 1386×1 billion cubic meters, of which ocean water is 1338×1 billion cubic meters, accounting for about 96.5% of the global total, and freshwater resources only account for 3.5% of the global total. And fresh water mainly exists in the form of glaciers and deep groundwater, and the fresh water that humans can directly use, such as rivers and lakes, only accounts for 0.3% of the world's total fresh water. Therefore, water shortage has become the primary problem facing cities all over the world. About 1.5 billion people in 80 countries and regions accounting for 40% of the world's total population are short of fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08J9/42C08J9/40C02F1/14C02F103/08
CPCC02F1/14C02F2103/08C08J9/40C08J9/42C08J2383/04C08J2423/12Y02A20/124Y02A20/142Y02A20/212
Inventor 云山邵康胡圆圆李玉宝郭探洪坤陈静
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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