Preparation method of photocuring type superhydrophobic composite film

A composite membrane and super-hydrophobic technology, applied in the coating and other directions, can solve the problems of unfavorable promotion and implementation, high cost of preparation process, and high requirements for process accuracy, and achieve good hydrophobic effect, simple operation process, and enhanced anti-detachment strength.

Active Publication Date: 2017-10-03
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation scheme is not only highly dependent on the existing hydrophobic structure of biological materials, but also needs to carry out multiple copies of the existing hydrophobic structure

Method used

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  • Preparation method of photocuring type superhydrophobic composite film
  • Preparation method of photocuring type superhydrophobic composite film
  • Preparation method of photocuring type superhydrophobic composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Urethane acrylate prepolymer and photoinitiator 1173 were weighed according to the mass ratio of 98:2, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating under ultraviolet light for 1 s. Weigh the silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, then add a certain amount of hydrophobic nano-silica, and ultrasonicate for 30 minutes after stirring. Prepare a suspension; the mass fractions of silicone rubber, mercapto silicone, photoinitiator, silicon dioxide and n-hexane in the suspension are: 5%, 0.6%, 0.05%, 4%, 90.35%, respectively. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 30 s to prepare a superhydrophobic elastic composite film.

Embodiment 2

[0044] Urethane acrylate prepolymer and photoinitiator 184 were weighed according to the mass ratio of 95:5, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating with ultraviolet light for 20s. Weigh the silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, then add a certain amount of hydrophobic nano-silica, and ultrasonicate for 30 minutes after stirring. Prepare a suspension; the mass fractions of silicone rubber, mercapto silicone, photoinitiator, silicon dioxide and n-hexane in the suspension are: 5%, 0.8%, 0.05%, 3.8%, and 90.35%, respectively. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 50 s to prepare a superhydrophobic elastic composite film.

Embodiment 3

[0046] Urethane acrylate prepolymer and photoinitiator TPO were weighed according to the mass ratio of 97:3, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating under ultraviolet light for 1 s. Weigh silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, and then add a certain amount of hydrophobic micron and nanometer silica (1:1 ), stirred and ultrasonicated for 30 minutes to make a suspension; the mass fractions of silicone rubber, mercaptoorganosilicon, photoinitiator, silicon dioxide and n-hexane in this suspension were: 7%, 1.1%, 0.2%, respectively. 5.5%, 86.2%. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 60 s to prepare a superhydrophobic elastic composite film.

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Abstract

The invention discloses a preparation method of a photocuring type superhydrophobic composite film. The composite film comprises an elastic substrate and a surface superhydrophobic layer. The preparation method comprises the following steps: firstly, preparing the elastic substrate: uniformly mixing a photoinitiator with a prepolymer, and carrying out ultraviolet irradiation on an obtained mixture to obtain a precured elastic substrate; secondly, preparing turbid liquid: uniformly dispersing a polymer with low surface energy, the photoinitiator, a cross-linking agent and micro and/or nano hydrophobic particles in a solvent to obtain the turbid liquid; thirdly, preparing the superhydrophobic composite film: coating the elastic substrate with the turbid liquid, and then carrying out ultraviolet irradiation curing treatment to obtain the composite film with superhydrophobicity. According to the superhydrophobic composite film prepared by the preparation method disclosed by the invention, the elastic substrate and the superhydrophobic layer are integrated by chemical crosslinking; the uperhydrophobic composite film has the advantages of simple preparation process, good friction resistance and tensile resistance, stable superhydrophobic effect and the like; the coating is not easy to fall off.

Description

technical field [0001] The invention relates to the field of preparation of a super-hydrophobic composite film, in particular to a preparation method of a photocurable super-hydrophobic elastic composite film. Background technique [0002] The biomimetic superhydrophobic coating has excellent self-cleaning, anti-wetting, waterproof and water-repellent properties, and can be used in the fields of self-cleaning of the surface of building materials, waterproofing of the surface of fabrics and circuit boards, and drag reduction of the hull surface. These superior properties of superhydrophobic coatings have prompted people to make efforts to construct various coatings with superhydrophobic functions. [0003] At present, the main methods for constructing super-hydrophobic coatings include vapor deposition (CN102953105A), template (CN103724639A), surface etching (CN103409754A), self-assembly (CN105039953A), and dip coating. texture surface, a small part on the elastic surface. ...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J5/18C08J3/28C08J3/24C09D183/04C09D123/20C09D7/12C08L75/14C08L63/10C08L71/00C08L83/07
CPCC08J3/244C08J3/28C08J5/18C08J7/0427C08J2363/10C08J2371/00C08J2375/14C08J2383/04C08J2423/22C08J2483/04C08K3/36C08K5/548C08K9/00C08K2003/265C08K2201/011C09D123/22C09D183/04
Inventor 唐昶宇李永升邵虹何周坤帅茂兵梅军
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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