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PU graphene waterproof moisture-penetrable film and preparation method thereof

A waterproof and moisture-permeable membrane, graphene technology, applied in the manufacture of rayon, chemical characteristics of fibers, non-woven fabrics, etc., can solve problems such as damage, decreased use effect, surface cracks of PU membrane, etc., to achieve good waterproof and moisture permeability, good Thermal conductivity, good heat removal effect

Inactive Publication Date: 2020-11-20
安徽达钰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The waterproof and see-through effect of the existing waterproof and moisture-permeable membranes is average, and there will be a large amount of moisture remaining during use, which cannot be dispersed, so that the use effect will be reduced, and the traditional PU membrane has poor UV resistance, and it will be damaged after a long time. After exposure to light, cracks will appear on the surface of the PU membrane, and then damage will occur, making the waterproof and moisture-permeable membrane unable to work normally

Method used

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  • PU graphene waterproof moisture-penetrable film and preparation method thereof
  • PU graphene waterproof moisture-penetrable film and preparation method thereof
  • PU graphene waterproof moisture-penetrable film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A kind of PU graphene waterproof and moisture-permeable membrane is made by following steps:

[0042] Step S1: Electrospinning the spinning solution under the conditions of a spinning flow rate of 0.6mL / h, a spinning voltage of 12kV, a temperature of 22°C, and a humidity of 35%, to obtain a PU film;

[0043] Step S2: Add the anti-ultraviolet agent into chloroform, stir until the anti-ultraviolet agent is completely dissolved, add the PU film prepared in step S1 for soaking, and soak for 20 hours at 110°C, then filter and remove the filtrate to obtain PU graphene waterproof and moisture-permeable membrane.

[0044] Described spinning solution is made by following steps:

[0045] Step A1: Add nitric acid solution and sulfuric acid solution into the reaction kettle, stir at a speed of 100r / min and a temperature of 0°C, add graphite and potassium chlorate, and react for 50 hours at a temperature of 50°C , add deionized water to stand still until stratified, remove the sup...

Embodiment 2

[0056] A kind of PU graphene waterproof and moisture-permeable membrane is made by following steps:

[0057] Step S1: Electrospinning the spinning solution under the conditions of a spinning flow rate of 0.7mL / h, a spinning voltage of 13kV, a temperature of 25°C, and a humidity of 37%, to obtain a PU film;

[0058] Step S2: Add the anti-ultraviolet agent into chloroform, stir until the anti-ultraviolet agent is completely dissolved, add the PU film prepared in step S1 for soaking, and soak at 113°C for 22 hours, then filter and remove the filtrate to obtain PU graphene waterproof and moisture-permeable membrane.

[0059] Described spinning solution is made by following steps:

[0060] Step A1: Add nitric acid solution and sulfuric acid solution into the reaction kettle, stir at a speed of 120r / min and a temperature of 1°C, add graphite and potassium chlorate, and react for 60 hours at a temperature of 55°C , add deionized water to stand still until stratified, remove the sup...

Embodiment 3

[0071] A kind of PU graphene waterproof and moisture-permeable membrane is made by following steps:

[0072] Step S1: Electrospinning the spinning solution under the conditions of a spinning flow rate of 0.8mL / h, a spinning voltage of 15kV, a temperature of 28°C, and a humidity of 40%, to obtain a PU film;

[0073] Step S2: Add the anti-ultraviolet agent into chloroform, stir until the anti-ultraviolet agent is completely dissolved, add the PU film prepared in step S1 for soaking, and soak for 25 hours at 115°C, then filter and remove the filtrate to obtain PU graphene waterproof and moisture-permeable membrane.

[0074] Described spinning solution is made by following steps:

[0075] Step A1: Add nitric acid solution and sulfuric acid solution into the reaction kettle, stir at a speed of 150r / min and a temperature of 3°C, add graphite and potassium chlorate, and react for 80 hours at a temperature of 60°C , add deionized water to stand still until stratified, remove the sup...

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Abstract

The invention discloses a PU graphene waterproof moisture-penetrable film and a preparation method thereof. In a process of preparing the PU graphene waterproof moisture-penetrable film, an anti-ultraviolet agent is prepared, carbonyl and ortho-hydroxyl in anti-ultraviolet agent molecules define intramolecular hydrogen bonds, so that a stable conjugated structure is achieved, and therefore, ultraviolet rays can be absorbed; after the ultraviolet rays are absorbed, the intramolecular hydrogen bonds are damaged, and hydrogen bond rings are opened, so that the anti-ultraviolet agent defines an ionic type compound, and therefore, light energy is converted into heat energy to release, the hydrogen bonds are restored, ultraviolet resistance of waterproof moisture-penetrable film is guaranteed, and the waterproof moisture-penetrable film is free of cracks to cause damage after being illuminated for a long time; moreover, the anti-ultraviolet agent molecules contain as isocyanate group which is cross-linked with an imino group in the PUF film, so that the anti-ultraviolet agent molecules are attached onto the waterproof moisture-penetrable film very well.

Description

technical field [0001] The invention belongs to the technical field of PU film preparation, and in particular relates to a PU graphene waterproof and moisture-permeable film and a preparation method thereof. Background technique [0002] With the advancement of technology, the main waterproof and moisture-permeable film materials are: microporous film and hydrophilic film. Among them, the microporous film is a very thin polymer film with a large number of small and connected micropores. In the microporous film, water droplets are bound in the holes and fixed by surface tension; the smaller the holes, The more external force is needed to break the surface tension to make the water droplets overflow the hole; therefore, the waterproof ability of the microporous film is inversely proportional to the diameter of the hole, the moisture permeability is directly proportional to the diameter and porosity of the hole, and inversely proportional to the thickness of the film; therefore...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10D04H1/4358D04H1/728D06M13/395D06M101/38
CPCD01F6/94D01F1/10D04H1/728D04H1/4358D06M13/395D06M2101/38D06M2200/25
Inventor 林聪仁
Owner 安徽达钰新材料科技有限公司