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
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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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