A polysulfone-based light-to-heat conversion composite film for solar water evaporation and its preparation method
A light-to-heat conversion and light-to-heat conversion layer technology, which is applied in the steam generation method using solar energy, solar thermal energy, solar thermal power generation, etc., can solve the problem of large footprint of heat insulation materials, limited equipment use range, lack of integrity, etc. problems, to achieve the effect of excellent mechanical properties, excellent oxidation resistance, and controllable structure
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Embodiment 1
[0037] Add 10 parts by mass of polysulfone particles and 90 parts by mass of dimethylacetamide into a round bottom flask, heat at 70°C and dissolve at 450 rpm for 18 hours until a homogeneous solution is formed, and then stand at constant temperature for defoaming. After defoaming, cast the casting solution on a rough glass plate, spread the casting solution with a scraper to form a primary film, place the primary film in the air for 10 hours to let the solvent evaporate naturally, and transfer it into deionized water to remove it after curing. Excess solvent remaining in the membrane matrix. The obtained polysulfone-based membrane has a cellular pore structure with a pore size of 18 μm, a membrane thickness of 150 μm, and a thermal conductivity of 0.055 W m -1 K -1 , has excellent thermal insulation properties.
[0038] Put 2.0g PS in 20mL of dichloromethane, and stir to make it completely dissolved into a homogeneous solution; put 2.0g of PVP in 50mL of deionized water, an...
Embodiment 2
[0041] Add 20 parts by mass of polysulfone particles and 80 parts by mass of dimethyl sulfoxide into a round bottom flask, heat at 80°C and dissolve at 450 rpm for 22 hours until a homogeneous solution is formed, and then stand at constant temperature for defoaming. After defoaming, cast the casting solution on a rough glass plate, spread the casting solution with a scraper to form a primary film, place the primary film in the air for 8 hours to volatilize naturally, and then move it into deionized water to remove the residue in the film matrix excess solvent. The obtained polysulfone-based membrane has a cellular pore structure with a pore size of 5 μm, a membrane thickness of 500 μm, and a thermal conductivity of 0.042 W m -1 K -1 , has excellent thermal insulation properties.
[0042] Put 1.0g PS in 20mL of dichloromethane, and stir to make it completely dissolved into a homogeneous solution; put 1.0g of PVP in 40mL of deionized water, and heat at 35°C until completely di...
Embodiment 3
[0045] Add 15 parts by mass of polysulfone particles and 85 parts by mass of dimethyl sulfoxide into a round bottom flask, heat at 75°C and dissolve at 400rpm for 10h until a homogeneous solution is formed, and then stand at constant temperature for defoaming. After degassing, cast the casting solution on a rough glass plate, spread the casting solution with a scraper to form a primary film, place the primary film in the air for 15 hours to volatilize naturally, and then move it into deionized water to remove the residue in the film matrix excess solvent. The obtained polysulfone-based membrane has a cellular pore structure with a pore size of 12 μm, a membrane thickness of 380 μm, and a thermal conductivity of 0.04 W m -1 K -1 , has excellent thermal insulation properties.
[0046] Put 4g of PS in 50mL of dichloromethane, and stir to make it completely dissolved into a homogeneous solution; put 4g of PVP in 100mL of deionized water, and heat at 50°C until completely dissolv...
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