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Waterproof breathable composite net, and preparation method and application thereof

A waterproof, breathable, mesh technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc. Simple, easy-to-use effects

Active Publication Date: 2021-11-19
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the object of the present invention is to provide a waterproof and breathable composite net and its preparation method and application, so as to solve the problem of poor waterproof and breathable performance of the existing waterproof net

Method used

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  • Waterproof breathable composite net, and preparation method and application thereof
  • Waterproof breathable composite net, and preparation method and application thereof
  • Waterproof breathable composite net, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for preparing a waterproof and breathable composite net, comprising the following steps:

[0040] (1) Select the two-layer mesh with 60 meshes to weave copper mesh, first use acetone to ultrasonically wash for 30 minutes, and then use deionized water to ultrasonically wash for 30 minutes to obtain a clean copper mesh;

[0041] (2) one layer of clean copper mesh of step (1) gained is etched 5min in the mixed solution of sodium hydroxide and ammonium persulfate, then dries, obtains the high superhydrophilic copper mesh of surface energy, wherein, The concentration of sodium hydroxide in the mixed solution is 5mol / L, and the concentration of ammonium persulfate is 0.2mol / L;

[0042] (3) Soak another layer of clean copper mesh obtained in step (1) in the ethanol solution of n-dodecylmercaptan for 1h, and then dry to obtain a hydrophobic copper mesh with low surface energy. Dialkyl mercaptan quality is 5% of ethanol quality;

[0043] (4) Use the superhydrophilic c...

Embodiment 2

[0046]A method for preparing a waterproof and breathable composite net, comprising the following steps:

[0047] (1) Select two layers of nylon nets with meshes of 120 mesh, first use acetone to ultrasonically wash for 30 minutes, and then use deionized water to ultrasonically wash for 30 minutes to obtain a clean nylon net;

[0048] (2) Utilize the spray gun to spray the hydrophilic solvent on the front and back sides of one layer of clean nylon net obtained in step (1), to obtain super-hydrophilic nylon net, wherein the hydrophilic solvent is obtained by adding 0.4g TiO 2 Add nanoparticles and 0.05g polyurethane to 20ml acetone solution, and magnetically stir for 1 hour to prepare;

[0049] (3) Use a spray gun to spray a hydrophobic solvent on the front and back sides of another layer of clean nylon net obtained in step (1) to obtain a superhydrophobic nylon net, wherein the hydrophobic solvent is obtained by mixing polyvinylidene fluoride, hydrophobic It is prepared by mix...

Embodiment 3

[0052] A method for preparing a waterproof and breathable composite net, comprising the following steps:

[0053] (1) Select two layers of perforated stainless steel mesh with a mesh size of 300 mesh, first use acetone to ultrasonically wash for 30 minutes, and then use deionized water to ultrasonically wash for 30 minutes to obtain a clean stainless steel mesh;

[0054] (2) Utilize the spray gun to spray the hydrophilic solvent on the front and back sides of one layer of clean stainless steel mesh obtained in step (1), to obtain the superhydrophilic stainless steel mesh, wherein the hydrophilic solvent is obtained by adding 0.4gTiO 2 Add nanoparticles and 0.05g polyurethane to 20ml acetone solution, and magnetically stir for 1 hour to prepare;

[0055] (3) cleaning another layer of clean stainless steel mesh oxygen plasma of step (1) gained for 20min, then grafting reaction in the grafting reaction solution for 30min, and then drying to obtain the hydrophobic stainless steel ...

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Abstract

The invention discloses a waterproof breathable composite net. The composite net is composed of an upper layer net and a bottom layer net, and the distance between the upper layer net and the bottom layer net is 0.5-1.5 mm. The mesh number of the upper layer net and the mesh number of the bottom layer net are both 40-300, the mesh number of the bottom layer net is larger than or equal to that of the upper layer net, the surface of the upper layer net is a hydrophilic surface or a super-hydrophilic surface, and the surface of the bottom layer net is a hydrophobic surface or a super-hydrophobic surface. A preparation method of the composite net comprises the following steps: taking two layers of nets with the same size and material, carrying out hydrophilic modification on the surface of one layer of net, then carrying out hydrophobic modification on the surface of the other layer of net, and finally fixing the four edges of the obtained net according to a certain interval to obtain the waterproof and breathable composite net. The waterproof breathable composite net has good waterproof and breathable effects, the applicable mesh number range is wide, and the waterproof effect is good even if the mesh number is low.

Description

technical field [0001] The invention relates to the technical field of preparation of waterproof and breathable materials, in particular to a waterproof and breathable composite net and its preparation method and application. Background technique [0002] At present, waterproof and breathable mesh has attracted attention in many fields due to its unique waterproof and breathable performance and wide application potential, such as applications in oil-water separation, waterproof textiles, greenhouse films, building waterproof mesh, waterproof screens and other fields. However, due to the pore structure characteristics of the mesh itself, as the number of meshes increases, its waterproof ability increases, but its air permeability and light transmission performance decrease, and the two cannot be balanced. [0003] Existing waterproof nets are mainly divided into single-layer nets and multi-layer nets. Single-layer waterproof nets are mainly sprayed with waterproof paint on th...

Claims

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Application Information

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IPC IPC(8): B32B15/01B32B15/02B32B15/18B32B15/20B32B27/02B32B27/06B32B27/34B32B33/00
CPCB32B15/01B32B15/02B32B15/011B32B15/20B32B5/02B32B5/26B32B33/00B32B2262/0261B32B2307/724B32B2307/728B32B2307/73B32B2307/7265
Inventor 邓旭罗瑶王德辉
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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