Preparation method of waterproof moisture-permeable nanofiber composite membrane
A nanofiber, waterproof and moisture-permeable technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of poor moisture permeability of composite membranes, achieve excellent comprehensive performance, prevent liquid penetration, and prevent penetration.
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Embodiment 1
[0037] In parts by weight, weigh 30 parts of nano-silica, 12 parts of dimethyldichlorosilane, 6 parts of stearic acid, 60 parts of absolute ethanol, and 30 parts of deionized water, and add deionized water to anhydrous In ethanol, stir at a speed of 100r / min at room temperature for 6h to obtain an ethanol solution, add dimethyldichlorosilane and stearic acid to the ethanol solution, stir at a speed of 180r / min in a water bath at 30°C for 12min, keep warm, To obtain a modified solution, add nano silicon dioxide to the modified solution, stir at 800r / min for 30min in a water bath at 30°C to obtain a suspension, place the suspension in an ultrasonic disperser, and Power ultrasonic vibration for 20 minutes to obtain a dispersion, put the dispersion in a centrifuge, and centrifuge at a speed of 4000r / min for 15 minutes at room temperature, remove the lower layer of solid, wash with absolute ethanol three times, and then wash once with deionized water. Dry in an oven at 50°C for 1 h...
Embodiment 2
[0039] In parts by weight, weigh 35 parts of nano-silica, 14 parts of dimethyldichlorosilane, 7 parts of stearic acid, 70 parts of absolute ethanol, and 35 parts of deionized water, and add deionized water to anhydrous In ethanol, stir at a speed of 110r / min at room temperature for 7h to obtain an ethanol solution, add dimethyldichlorosilane and stearic acid to the ethanol solution, stir at a speed of 190r / min in a water bath at 35°C for 14min, keep warm, To obtain a modified solution, add nano-silica to the modified solution, stir at a speed of 900 r / min for 35 min in a water bath at 35°C to obtain a suspension, place the suspension in an ultrasonic disperser, and Power ultrasonic vibration for 25 minutes to obtain a dispersion, put the dispersion in a centrifuge, centrifuge at a speed of 4250r / min at room temperature for 18 minutes, remove the lower layer of solid, wash 4 times with absolute ethanol, and then wash 2 times with deionized water. Dry in an oven at 55°C for 1 ho...
Embodiment 3
[0041] In parts by weight, weigh 40 parts of nano-silica, 16 parts of dimethyldichlorosilane, 8 parts of stearic acid, 80 parts of absolute ethanol, and 40 parts of deionized water, and add deionized water to anhydrous In ethanol, stir at a speed of 120r / min at room temperature for 8h to obtain an ethanol solution, add dimethyldichlorosilane and stearic acid to the ethanol solution, stir at a speed of 200r / min in a water bath at 40°C for 16min, keep warm, To obtain a modified solution, add nano-silica to the modified solution, stir at a speed of 1000r / min for 40min in a water bath at 40°C to obtain a suspension, place the suspension in an ultrasonic disperser, and Power ultrasonic vibration for 30 minutes to obtain a dispersion, put the dispersion in a centrifuge, and centrifuge at a speed of 4500r / min at room temperature for 20 minutes, remove the lower layer of solid, wash 5 times with absolute ethanol, and then wash 3 times with deionized water. Dry in an oven at 60°C for 2...
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