Waterproof and moisture permeable composite membrane and preparation method thereof

A waterproof and moisture-permeable, composite membrane technology, applied in the field of textiles, can solve the problems of uneven distribution of micropores and complex processes in composite membranes, and achieve the effects of good chemical gas particle performance, complex operation, and excellent high and low temperature resistance.

Active Publication Date: 2014-08-06
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a waterproof and moisture-permeable composite membrane for the complex process of preparing composite membrane by stretching method and uneven micropore distribution of the prepared composite membrane. The waterproof and moisture-permeable composite membrane is electrospun prepared by the silk method

Method used

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  • Waterproof and moisture permeable composite membrane and preparation method thereof
  • Waterproof and moisture permeable composite membrane and preparation method thereof
  • Waterproof and moisture permeable composite membrane and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0039] The waterproof and moisture-permeable composite membrane of this embodiment includes a hydrophobic membrane 2 and a hydrophilic membrane 1, the hydrophobic membrane 2 is made by electrospinning on the surface of the hydrophilic membrane 1, and the main component of the hydrophobic membrane 2 is polyvinylidene fluoride , the hydrophobic film 2 is doped with acrylate rubber accounting for 2.4% of the mass of polyvinylidene fluoride, the thickness of the hydrophobic film 2 is 50 μm; the hydrophilic film 1 is thermoplastic polyester, the thickness of the hydrophilic film 1 is 15 μm, electrospinning The nanofiber diameter is 1000nm.

[0040] The preparation method of the waterproof and moisture-permeable composite membrane of this embodiment, the steps are as follows:

[0041] (1) Dissolve polyvinylidene fluoride with an intrinsic viscosity of 33.0mpa·S in a mixture of N,N-dimethylacetamide and acetone with a volume ratio of 1:1 to make a solution with a concentration of 11w...

Embodiment 2

[0045] The waterproof and moisture-permeable composite membrane of this embodiment includes a hydrophobic membrane and a hydrophilic membrane. The hydrophobic membrane is made by electrostatic spinning on the surface of the hydrophilic membrane. The main component of the hydrophobic membrane is polytetrafluoroethylene, and the hydrophobic membrane is mixed with Mixed with acrylate rubber accounting for 9.6% of the mass of PTFE, the thickness of the hydrophobic film is 150 μm; the hydrophilic film is thermoplastic polyester, the thickness of the hydrophilic film is 20 μm, and the diameter of the electrospun nanofiber is 4000 nm.

[0046] The preparation method of the waterproof and moisture-permeable composite membrane of this embodiment, the steps are as follows:

[0047] (1) Dissolve polytetrafluoroethylene with an intrinsic viscosity of 41.0mpa·S in a mixture of N,N-dimethylacetamide and acetone with a volume ratio of 2:1 to make a solution with a concentration of 17wt%. Und...

Embodiment 3

[0051] The waterproof and moisture-permeable composite membrane of this embodiment includes a hydrophobic membrane and a hydrophilic membrane. The hydrophobic membrane is made by electrospinning on the surface of the hydrophilic membrane. The main component of the hydrophobic membrane is polyvinylidene fluoride, and the hydrophobic membrane is mixed with Mixed with acrylate rubber accounting for 7.8% of the mass of polyvinylidene fluoride, the thickness of the hydrophobic film is 100 μm; the hydrophilic film is thermoplastic polyester, the thickness of the hydrophilic film is 15 μm, and the diameter of the electrospun nanofiber is 2000 nm.

[0052] The preparation method of the waterproof and moisture-permeable composite membrane of this embodiment, the steps are as follows:

[0053] (1) Dissolve polyvinylidene fluoride with an intrinsic viscosity of 35.0mpa·S in a mixture of N,N-dimethylacetamide and acetone with a volume ratio of 4:1 to make a solution with a concentration of...

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Abstract

The invention discloses a waterproof and moisture permeable composite membrane and a preparation method thereof. The waterproof and moisture permeable composite membrane includes a hydrophobic film and a hydrophilic membrane; a thermoplastic polyester elastomer (TPEE) membrane is used as the receiving base, a hydrophobic polymer spinning solution is stretched into nanoscale / sub-micron fibers through the electrostatic spinning nanotechnology, and is deposited on a non-porous membrane to form the composite membrane (hydrophilic membrane and microporous membrane). With adoption of the electrostatic spinning one-step forming method, the preparation technology of the composite membranes is greatly shortened. The preparation technology is simple and practical, and the spinning process is stable and free from contamination. The prepared composite membrane has high adhesive fastness, is applicable to fire control chemical protective clothing fabric, and also can be widely used in individual protective equipment fabric in the industries and fields of metallurgy, petroleum, military, dangerous chemicals, decontamination and the like.

Description

technical field [0001] The invention belongs to the technical field of textiles, and in particular relates to a waterproof and moisture-permeable composite membrane and a preparation method thereof. Background technique [0002] The waterproof and moisture-permeable composite membrane refers to the microporous membrane as the supporting layer, and the surface is covered with a certain thickness of hydrophilic non-porous membrane as the selective separation layer. . The composite fabric laminated by this type of composite film has the function of preventing water droplets (or liquid droplets) from penetrating into the fabric, while the sweat emitted by the human body can be diffused to the outside through the fabric, and can block or isolate toxic biochemical substances. It cannot penetrate the human body. [0003] Waterproof and moisture-permeable membranes have been widely used in various fields since their inception. According to the moisture-permeable mechanism, moistur...

Claims

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Application Information

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IPC IPC(8): B32B25/04B32B25/08D04H1/4382D04H1/728
Inventor 朱方龙周宇李克兢刘让同
Owner ZHONGYUAN ENGINEERING COLLEGE
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