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Composite material imitating desert beetle structure and preparation method of composite material

A technology of composite materials and beetles, applied to special surfaces, devices for coating liquids on surfaces, coatings, etc., can solve problems such as weak adhesion and poor structural stability

Active Publication Date: 2021-09-14
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: for the weak adhesion of the hydrophilic part of the imitation desert beetle structure in the prior art on the hydrophobic surface, and poor structural stability Insufficient, provide a composite material with imitation desert beetle structure and its preparation method

Method used

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  • Composite material imitating desert beetle structure and preparation method of composite material
  • Composite material imitating desert beetle structure and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] step 1:

[0065] Prepare the substrate layer: pretreat the cleaned and dried polyethylene substrate with 50V air plasma for 60s, and set aside;

[0066] Prepare the first solution: 3-Aminopropyltriethoxysilane hydrophobizing agent and absolute ethanol were magnetically heated and stirred in a water bath with a temperature of 30°C and a stirring rate of 1000r / min for 30min to prepare a solution with a mass concentration of 0.1%. Solution, namely obtain the first solution, standby.

[0067] Prepare the second solution: add polyacrylamide with an average molecular weight of 8,000,000 g / mol and water-based polyurethane to the second solvent; control the mass concentration of polyacrylamide to 0.5%, and control the mass fraction of water-based polyurethane to 0.05%. The second solvent is a second solvent formed of acetone and deionized water with a mass concentration of 70.0%. In a water bath at a temperature of 90° C. and a stirring rate of 2000 r / min, the mixture was mag...

Embodiment 2

[0074] step 1:

[0075] Prepare the substrate layer: pretreat the cleaned and dried polyethylene terephthalate substrate with 100V air plasma for 30s, and set aside;

[0076] Prepare the first solution: γ-glycidyl etheroxypropyl trimethoxysilane hydrophobic agent and absolute ethanol were magnetically heated and stirred in a water bath with a temperature of 40°C and a stirring rate of 1500r / min for 10 minutes to prepare a mass concentration of 0.5% solution, to obtain the first solution, for subsequent use;

[0077] Prepare the second solution: add polyvinyl alcohol with an average molecular weight of 720000 g / mol and water-based epoxy resin into the second solvent. The mass concentration of polyvinyl alcohol is controlled to be 2.0%, and the mass fraction of water-based epoxy resin is controlled to be 0.2%. The second solvent is a second solvent formed of ethanol and deionized water with a mass concentration of 60.0%. Magnetically heated and stirred in a water bath with a ...

Embodiment 3

[0084] step 1:

[0085] Prepare the substrate layer: pretreat the cleaned and dried polychlorinated p-xylylene material with 150V air plasma for 15s, and set aside;

[0086]Prepare the first solution: magnetically heat and stir γ-methacryloxypropyltrimethoxysilane hydrophobic agent with a mass concentration of 1.0% and absolute ethanol in a water bath at a temperature of 30°C and a stirring rate of 1500r / min Disperse for 20 minutes to obtain the first solution and set aside;

[0087] Prepare the second solution: add polyethylene glycol and water-based polyurethane to the second solvent, heat in a water bath at 50°C, and disperse with magnetic stirring for 90 minutes at a stirring rate of 1200 r / min to obtain the second solution. The second solvent is a mixed solvent composed of N,N-dimethylformamide and deionized water with a mass concentration of 50.0%. Control the mass concentration of polyethylene glycol in the second solution to be 5.0%, and the mass fraction of water-ba...

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Abstract

The invention relates to a composite material imitating a desert beetle structure and a preparation method of the composite material. The composite material imitating the desert beetle structure comprises a base material layer, a modification layer and a hydrophilic structure layer; the modification layer is arranged on the surface of the base material layer, the hydrophilic structure layer is arranged on the surface of the modification layer, and the base material layer is a polymer material, a metal material, an inorganic non-metal material or a composite material thereof; and the modification layer is a hydrophobic modification layer formed by coating the base material layer subjected to air plasma pretreatment with a hydrophobic agent, and the hydrophilic structure layer is a functional layer with hydrophilic polymer particles. The novel composite material imitating the desert beetle structure is expected to be used in various fields such as material water vapor barrier capability improvement, desert water collection and seawater desalination, the novel structure is simple in preparation process, low in equipment requirement and low in cost, the hydrophilic part and the hydrophobic surface have the advantages of being high in adhesive force, stable in structure and the like, and the novel composite material has high market value and economic value.

Description

technical field [0001] The invention relates to the technical field of preparation of water vapor barrier functional composite materials, in particular to a composite material with a desert beetle imitation structure and a preparation method thereof, in particular to a water vapor barrier functional composite material with a desert beetle imitation structure and a preparation method thereof. Background technique [0002] The desert beetle collects a large number of water droplets by virtue of its rough surface composed of hydrophobic regions and hydrophilic regions. When the water vapor encounters the surface of the desert beetle structure, it will condense into fog droplets. When the force is applied, the droplets will leave the surface, so as to realize the collection of droplets or prevent the further penetration of water vapor on the surface. Because the desert beetle imitation structure has hydrophilic components on the surface of the hydrophobic region, the polarity di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/04B05D5/00B05D7/02B05D7/00B05D7/14B05D7/24B05D1/36C08J7/12C08J7/04C08L23/06C08L67/02C08L33/12C08L27/18C08L83/04C08L65/00
CPCB05D5/04B05D5/00B05D7/24B05D7/54B05D7/02B05D7/14B05D1/36C08J7/123C08J7/042B05D2203/30C08J2323/06C08J2433/26C08J2475/04C08J2367/02C08J2429/04C08J2463/00C08J2471/02C08J2333/12C08J2401/28C08J2327/18C08J2383/04C08J2365/00
Inventor 何周坤詹浩然梅军曾文文李红梅杨小琛潘锦源陈国梁卢苏阳商云帆
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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