Waterproof moisture-permeable film and preparation method and application thereof

A technology of waterproof and moisture-permeable membrane and water-repellent agent, applied in textiles and papermaking, non-woven fabrics, fiber types, etc., can solve the problems of poor bonding force and poor durability of hydrophobic coating, and achieve small pore size, high water pressure resistance and permeability. Wet flux, wide range of effects

Active Publication Date: 2021-07-16
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fiber membrane prepared by the current post-finishing coating method is due to the physical combination between the waterproof agent coating and the fiber membrane, the bonding force between the waterproof agent coating and the fiber membrane is poor, and the durability of the hydrophobic coating is poor. , it is difficult to meet the practical needs

Method used

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  • Waterproof moisture-permeable film and preparation method and application thereof
  • Waterproof moisture-permeable film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, a waterproof and moisture-permeable membrane is prepared, and the specific steps are as follows:

[0041] (1) Preparation of electrospun fiber membrane: Dissolve blocked solvent-based isocyanate (unblocking temperature: 80°C) and polyacrylonitrile (relative molecular mass: 90,000) in solvent N, N- Prepare a spinning solution with a mass fraction of 8wt% in dimethylformamide, mechanically stir to obtain a uniform and stable solution, and receive polyacrylonitrile composite fiber membranes on glossy paper by electrospinning technology. The spinning voltage is 30kV, and the receiving distance The temperature is 20cm, the perfusion rate is 3mL / h, the temperature is 25°C, and the relative humidity is 50%.

[0042] (2) Get 2g of stearic acid solution with a solid content of 25%, prepare a 2wt% stearic acid solution, fully immerse the polyacrylonitrile composite fiber membrane in the stearic acid solution at room temperature, and then After drying for 30 minu...

Embodiment 2

[0047] In this example, a waterproof and moisture-permeable membrane is prepared, and the specific steps are as follows:

[0048] (1) Preparation of electrospun fiber membrane: Dissolve blocked solvent-based isocyanate (unblocking temperature 100°C) and cellulose acetate (acetyl 39.8wt%, hydroxyl 3.5wt%) in a mass ratio of 2:1 Prepare a spinning solution with a mass fraction of 18wt% in solvent dimethyl sulfoxide and acetone, mechanically stir to obtain a uniform and stable solution, and receive a cellulose acetate composite fiber film on glossy paper by electrospinning technology, and the spinning voltage is 30kV, the receiving distance is 20cm, the perfusion rate is 3mL / h, the temperature is 23°C, and the relative humidity is 60%.

[0049] (2) Take 1 g of hydroxy-terminated polysiloxane solution with a solid content of 30%, prepare a 2wt% hydroxy-terminated polysiloxane solution, and fully impregnate the cellulose acetate composite fiber membrane in the hydroxy-terminated po...

Embodiment 3

[0052] In this example, a waterproof and moisture-permeable membrane is prepared, and the specific steps are as follows:

[0053] (1) Preparation of electrospun fiber membrane: Dissolve blocked solvent-based isocyanate (unblocking temperature at 90°C) and nylon 6 (weight-average molecular weight 50,000) in solvent formic acid to prepare a mass ratio of 3:4 The spinning solution with a fraction of 10wt% was mechanically stirred to obtain a uniform and stable solution. The nylon 6 composite fiber membrane was received on glossy paper by electrospinning technology. The spinning voltage was 40kV, the receiving distance was 20cm, and the perfusion speed was 2mL / h , the temperature is 20°C, and the relative humidity is 60%.

[0054] (2) Take 2g of amino-terminated silicone oil solution with a solid content of 25%, prepare a 2wt% amino-terminated silicone oil solution, fully immerse the nylon 6 composite fiber membrane in the amino-terminated silicone oil solution at room temperature...

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Abstract

The invention provides a waterproof moisture-permeable film and a preparation method and application thereof. The waterproof moisture-permeable film takes a fiber film as a base material, has the advantages of wide spinnable raw material range, small fiber membrane aperture, high porosity, strong structure adjustability and the like, and can obtain higher water pressure resistance and moisture-permeable flux compared with waterproof and moisture-permeable fabrics. A blocked solvent isocyanate cross-linking agent is utilized, after the cross-linking agent is deblocked, the cross-linking agent and active groups in a waterproof agent are subjected to a cross-linking reaction, hydrophobic chain segments are stably coated on the surface of the fiber, and the durability of a waterproof agent coating is improved. After 50 times of abrasion circulation, the contact angle is not obviously changed, the water pressure resistance and the moisture-permeable flux are basically kept unchanged after 30 times of washing, and the waterproof moisture-permeable film has a wide application prospect in the fields of outdoor jackets, field military garments and medical treatment and public health.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a waterproof and moisture-permeable membrane and a preparation method and application thereof. Background technique [0002] The waterproof and moisture-permeable membrane can not only prevent the penetration of rain and snow from the outside, but also effectively discharge the sweat vapor generated by the human body. It has broad application prospects in the field of outdoor sportswear and protective clothing. [0003] In related technologies, waterproof and moisture-permeable membranes mainly include two categories: hydrophobic microporous membranes and hydrophilic non-porous membranes. Hydrophobic microporous membranes have good moisture permeability and comfort due to their porous structure, and have received extensive attention. Electrospun fiber membrane has the advantages of small pore size and high porosity, and is one of the effective methods to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/188D06M15/643D04H1/4382D04H1/728D06M101/28D06M101/08D06M101/34
CPCD06M13/188D06M15/643D06M15/6436D04H1/728D04H1/4382D10B2501/04D10B2401/021D06M2101/28D06M2200/12D06M2101/08D06M2101/34
Inventor 赵景王先锋陈丽霞闫建华于晖
Owner WUYI UNIV
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