Nanofiber thermal insulation material and preparation method thereof
A nanofiber and thermal insulation layer technology, applied in the field of nanocomposite fabrics and their preparation, can solve the problems of poor thermal insulation performance, lack of far-infrared self-heating function, complicated preparation process of aerogel, etc., and achieves high moisture permeability. Effect
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example 1
[0037] Polyurethane with a molecular weight of 200k was dissolved in DMF and HFIP was added, wherein the concentration of polyurethane was 25wt%, the concentration of DMF was 45wt%, and the concentration of additives was 20wt%. The solution was stirred evenly and divided into 2 equal parts.
[0038] A polyurethane solution is mixed with nano-zirconia particles to prepare a polyurethane-zirconia emulsion. The average diameter of the zirconia nanoparticles is 10 nm, and the solid content of the particles in the emulsion is 1 wt%.
[0039]The polyurethane-zirconia emulsion was spun with needle electrospinning equipment to prepare nanofiber waterproof and moisture-permeable porous membrane with far-infrared function. The film thickness is 15μm, the gram weight is 6gsm, and the moisture permeability is 20000g / m 2 / 24h or more, the hydrostatic pressure resistance performance is more than 10m.
[0040] Another part of the polyurethane solution was taken as the shell solution of coa...
example 2
[0047] A high molecular weight polyurethane with a molecular weight of 800k was dissolved in DMF and HFIP was added, wherein the concentration of polyurethane was 8wt%, the concentration of DMF was 88wt%, and the concentration of additives was 4wt%. The solution was stirred evenly and divided into 2 equal parts.
[0048] A polyurethane solution was mixed with nano-zirconia particles to prepare a polyurethane-zirconia emulsion. The average diameter of the zirconia nanoparticles was 300 nm, and the solid content of the particles in the emulsion was 10 wt%.
[0049] The polyurethane-zirconia emulsion was spun with needle electrospinning equipment to prepare nanofiber waterproof and moisture-permeable porous membrane with far-infrared function. The film thickness is 20μm, the gram weight is 15gsm, and the moisture permeability is 10000g / m 2 / 24h or more, the hydrostatic pressure resistance is more than 20m.
[0050] Another part of the polyurethane solution was taken as the shel...
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