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.

Inactive Publication Date: 2019-11-12
欧名龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention: Aiming at the problem of poor moisture permeability of existing composite membranes, a preparation method of waterproof and moisture-permeable nanofiber composite membranes is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a preparation method of a waterproof moisture-permeable nanofiber composite membrane, and belongs to the technical field of textile materials. According to the preparation method, polyacrylonitrile is taken as a main raw material, polyvinylidene fluoride and polyurethane are added, the waterproof and moisture-permeable nanofiber composite membrane is prepared, and the waterproof and moisture-permeable membrane prepared from polyacrylonitrile nanofibers has the characteristics of high porosity, fine fiber diameter and small pore diameter. The waterproof and moisture-permeable effect of the fiber membrane is effectively improved, the hydrophobic microporous membrane is preliminarily obtained by blending polyacrylonitrile, polyvinylidene fluoride and polyurethane through a solution, the waterproof moisture-permeable membrane with a certain welding structure is obtained in combination with heat treatment, penetration of liquid water is effectively prevented, polyurethane is a block polymer, polar groups such as hydrophilic groups which exist on a macromolecular chain segment provide a carrier for water vapor transfer, meanwhile, the polyurethane has a certain hydrophobic property by the hydrophobic group on the chain segment, and by addition of the polyurethane, the nanofiber composite membrane has excellent comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method of a waterproof and moisture-permeable nanofiber composite membrane, which belongs to the technical field of textile materials. Background technique [0002] Firefighting clothing is a special functional clothing that protects the personal safety of first-line rescuers. Its function is to prevent various forms of heat (convection heat, conduction heat, radiation heat and hot steam, etc.) Typical domestic fire-fighting thermal protective clothing has a multi-layer structure, which is a heat insulation layer, a vapor barrier layer, and a flame-retardant outer layer from the inside to the outside. Among them, the steam barrier layer is composed of waterproof and moisture-permeable membrane and the underlying fabric. Its function is to prevent the external high-temperature fire-fighting water from penetrating into the inner layer of the clothes and scald the human body, and it can also allow the sweat vapor of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D01D5/00D01F1/10D01F8/08D01F8/10D01F8/16C01B33/18
CPCC01B33/18D01D5/003D01D5/0092D01F1/10D01F8/08D01F8/10D01F8/16D04H1/4382D04H1/728
Inventor 欧名龙
Owner 欧名龙
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