Waterproof breathable film and preparation method thereof

A waterproof and breathable film and base film technology, applied in the field of film, can solve the problem that the waterproof and breathable effect of the waterproof breathable film needs to be strengthened, and achieve the effect of enhancing the waterproof and breathable function, enhancing the adhesion of the base film, and improving the waterproof and breathable effect.

Active Publication Date: 2021-07-30
GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The waterproof and breathable effects of the above waterproof and breathable membranes need to be strengthened

Method used

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  • Waterproof breathable film and preparation method thereof
  • Waterproof breathable film and preparation method thereof
  • Waterproof breathable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of polysulfone membrane: Polysulfone was dissolved in N,N-dimethylformamide (DMF) solvent, the weight percent of polysulfone was 15%, and the polysulfone solution was evenly spread on a clean glass plate. An aqueous phase solution is prepared, wherein the weight percentage of DMF is 1%, the weight percentage of sodium lauryl sulfate is 0.5%, and the balance is water. Soak the glass plate coated with the polysulfone solution in the aqueous phase solution for 5 minutes, take it out, and wash it with deionized water to obtain the polysulfone membrane.

[0040] Soak the polysulfone membrane in a methanol solution of dopamine with a pH of about 8.5 for 6 hours to form a layer of light black dopamine coating on the surface of the polysulfone membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polysulfone membrane was rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the fir...

Embodiment 2

[0051] The polysulfone membrane was prepared by the same preparation method as in Example 1.

[0052] Soak the polysulfone membrane in a methanol solution of dopamine with a pH of about 8.5 for 7 hours to form a layer of light black dopamine coating on the surface of the polysulfone membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polysulfone membrane was rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the first base membrane.

[0053] Then the polysulfone membrane (the first basement membrane) with dopamine coating is soaked in polyamine solution, soaking time is 0.5 hour, and the concentration of polyamine is 8mM, and the molecular structure of polyamine is as follows:

[0054]

[0055]Place the fully soaked first basement membrane on filter paper to absorb excess solution to obtain the second basement membrane, and transfer the second basement membrane to a clean glass dish. ...

Embodiment 3

[0061] The polysulfone membrane was prepared by the same preparation method as in Example 1.

[0062] Soak the polysulfone membrane in a methanol solution of dopamine with a pH of about 8.5 for 8 hours to form a layer of light black dopamine coating on the surface of the polysulfone membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polysulfone membrane was rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the first base membrane.

[0063] Then the polysulfone membrane (the first basement membrane) with dopamine coating is soaked in polyamine solution, soaking time is 1.5 hours, and the concentration of polyamine is 12mM, and the molecular structure of polyamine is as follows:

[0064]

[0065] Place the fully soaked first basement membrane on filter paper to absorb excess solution to obtain the second basement membrane, and transfer the second basement membrane to a clean glass dis...

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Abstract

The invention relates to a preparation method of a waterproof breathable membrane, comprising the following steps: dissolving dopamine in methanol to obtain a dopamine solution; dissolving polyamines in water to obtain a polyamine solution; dissolving acid chlorides in an organic solvent to obtain an acid chloride solution ; soak the basement membrane in the dopamine solution and dry to obtain the first basement membrane; soak the first basement membrane in the polyamine solution and dry to obtain the second basement membrane; drench the acid chloride solution washing on the second base film and drying to obtain a waterproof and breathable film; the acid chloride has a structure shown in formula (I): wherein, 2≤m≤5. The waterproof and breathable membrane prepared by the above method has more excellent waterproof and breathable functions.

Description

technical field [0001] The invention relates to the field of films, in particular to a waterproof breathable film and a preparation method thereof. Background technique [0002] Waterproof and breathable membrane, some also called waterproof and moisture-permeable membrane, refers to a film that can allow air or water vapor to pass through while being waterproof, and play the role of both waterproof and breathable. It first appeared and was used in textiles. In terms of materials, it is used to make outdoor sportswear, which can prevent water from penetrating into the clothes and at the same time play a breathable role, so that the sweat vapor of the skin can be evaporated in time to avoid condensation between the sweat vapor skin and clothes Gather for added comfort in clothing. [0003] At present, the common waterproof and breathable membranes on the market are mainly divided into three types. One is the microporous membrane, which is made of polyvinyl chloride, polyethy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/16C08L81/06
CPCC08J7/16C08J2381/06C08J2477/00
Inventor 张培
Owner GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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