A kind of airgel, preparation method and its application as solar evaporator

A technology of solar evaporator and aerogel, which is applied in the application fields of aerogel, preparation, and solar evaporator, which can solve the problems of limited solar energy efficiency of clean water rate and restrict the development of solar evaporator, etc., and achieve excellent photothermal conversion performance , good thermal management performance, no energy consumption effect

Active Publication Date: 2021-08-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to realize the design optimization of enhanced light absorption, local heat concentration, water supply and steam dissipation is still a difficult problem. The rate of clean water produced by solar-driven water evaporation and the efficiency of utilizing solar energy are still very limited. These Seriously restricting the development of solar evaporators

Method used

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  • A kind of airgel, preparation method and its application as solar evaporator
  • A kind of airgel, preparation method and its application as solar evaporator
  • A kind of airgel, preparation method and its application as solar evaporator

Examples

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Embodiment 1

[0050] A method of preparing a water supply layer

[0051] Step (1), adding preparation raw materials into the dispersion medium, stirring evenly under the condition of avoiding light until the preparation raw materials are completely dissolved to obtain a transparent acrylamide precursor solution; wherein, the dispersion medium is water, and the preparation raw materials include polymerization reaction Monomer, chemical cross-linking agent and photoinitiator, the polymerization reaction monomer is acrylamide, the chemical cross-linking agent is methylenebisacrylamide, and the photoinitiator is azobisisobutylamidine hydrochloride ; Specifically, prepare an acrylamide solution (AAm / H2O) with a concentration of 100 mg / ml, wherein the concentration of MBAA is 9.72 mg / ml, and the concentration of V-50 is 12.5 mg / ml, and stir for 1 hour in the dark to obtain a transparent precursor solution;

[0052] Step (2), create a radial freezing device with a radial temperature gradient. The ...

Embodiment 2

[0056] A kind of preparation method of light absorbing layer

[0057] Step (1), add the preparation raw materials into the dispersion medium, stir evenly under the condition of avoiding light until the preparation raw materials are completely dissolved, and obtain a transparent acrylamide precursor solution; wherein, the dispersion medium is water, and the raw materials include polymerization reaction unit Body, chemical cross-linking agent and photoinitiator, described polymerization reaction monomer is acrylamide, and described chemical cross-linking agent is methylenebisacrylamide, and described photoinitiator is azobisisobutylamidine hydrochloride; Specifically, prepare an acrylamide solution (AAm / H2O) with a concentration of 100 mg / ml, in which the concentration of MBAA is 9.72 mg / ml, and the concentration of V-50 is 12.5 mg / ml, and stirred for 1 hour in the dark to obtain a transparent precursor solution;

[0058] Step (2), inject the precursor solution into a square (si...

Embodiment 3

[0064] an airgel

[0065] Such as figure 1 As shown, an airgel is composed of a water-supply layer and a light-absorbing layer, wherein the water-supply layer comprises polyacrylamide with a high aspect ratio radially hierarchical porous structure for transporting water The airgel is a polyacrylamide-carbon nanotube composite airgel in which the light-absorbing layer includes a disordered hierarchical porous structure for evaporating water.

[0066] Further, the water supply layer is a polyacrylamide airgel with a radial hierarchical porous structure with a high aspect ratio, which has millimeter-scale radial divergence channels, micron-scale wrinkles and micropores formed at the pore walls, and nanoscale A hierarchical porous structure of a molecular network, wherein the hierarchical porous structure of radially diverging channels at the millimeter scale, the hierarchical porous structure of the micropores formed at the micron-scale folds and pore walls, and the hierarchical...

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Abstract

An airgel, a preparation method and its application as a solar evaporator, the airgel is composed of a water supply layer and a light absorption layer, wherein the preparation process of the water supply layer mainly includes: configuring a solution, radially Freezing, cross-linking by low-temperature UV radiation, freeze-drying and pretreatment. The preparation process of the light-absorbing layer mainly includes: configuring a solution, random freezing, low-temperature ultraviolet radiation cross-linking, freeze-drying, completely immersing the airgel in the configured carbon nanotube dispersion, and freeze-drying. In addition, when using airgel as a solar evaporator, the water supply layer at the lower layer provides water for the light absorbing layer at the upper layer, and the light absorbing layer at the upper layer absorbs solar energy and converts it into heat energy to evaporate water. , allowing water to be transported from the water supply layer to the light absorbing layer.

Description

technical field [0001] The invention belongs to the fields of fluid control, solar seawater desalination and sewage treatment, and in particular relates to an airgel, a preparation method and its application as a solar evaporator. Background technique [0002] Water is not only the material basis of life but also an important strategic resource. Due to global warming, environmental pollution, population growth, accelerated industrialization and urbanization, water resource issues have become the focus of the international community. Conflicts and wars over water resources have intensified in water-scarce regions such as Asia, Africa and the Middle East. my country is a country short of water resources, and the per capita water resources are only 2,100 cubic meters, which is only 28% of the world's average level. According to United Nations estimates, about 1.5 billion people in 80 countries and regions accounting for 40% of the world's total population are short of fresh wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/38C08F2/48C08J9/28B01D1/00B01J13/00C02F1/14C02F103/08
CPCB01D1/0035B01J13/0091C02F1/14C02F2103/08C08F2/48C08F220/56C08J9/28C08J2201/0484C08J2333/26C08F222/385Y02A20/124Y02A20/142Y02A20/212
Inventor 刘爱萍许为中吴化平邢赟施文梁左嘉劲张铖文
Owner ZHEJIANG SCI-TECH UNIV
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