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Preparation method and application of super-hydrophobic and adhesion-adjustable surface with micro-nano composite structure

A technology of micro-nano composite structure and composite microstructure, which is applied in the direction of coating, etc., can solve the problems of limited control of the surface adhesion characteristics of polymer products, and achieve the effects of excellent super-hydrophobic performance, expanded application range, and strong flexibility

Active Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively prepare polymer products with different wetting properties on the surface, but the degree of control of the adhesion properties of the polymer product surface is limited.

Method used

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  • Preparation method and application of super-hydrophobic and adhesion-adjustable surface with micro-nano composite structure
  • Preparation method and application of super-hydrophobic and adhesion-adjustable surface with micro-nano composite structure
  • Preparation method and application of super-hydrophobic and adhesion-adjustable surface with micro-nano composite structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 with Figure 2a-2c The specific implementation process for preparing a super-hydrophobic and high-adhesion surface using the present invention is shown. The equipment required for the implementation process of the present invention includes an injection molding machine (not shown in the figure), an injection mold A with a micro-nano composite structure template, an ultrasonic vibrator 6 and an oven 7. An injection mold A with a micro-nano composite structure template is connected to the injection molding machine. The injection mold A with a micro-nano composite structure template includes a fixed mold 8, a movable mold 9, and a hydrophilic nano-SiO 2 The solution-coated screen template B is provided with heating, cooling and demolding devices (not shown in the figure). Hydrophilic Nano SiO 2 The solution-coated screen template B includes screen template 1 with a mesh number of 1800 and hydrophilic nano-SiO attached to it. 2 Particle 2.

[0041] The implementation...

Embodiment 2

[0044] The implementation process of the PP product 11 with a super-hydrophobic and low-adhesion injection surface of the present invention is as follows. 0.6g of hydrophobic nano SiO 2 Particles 2 and 20ml of absolute ethanol 3 are formulated into a solution. After stirring evenly, immerse the sieve template 1 with a mesh number of 3000 into the solution. After 20 minutes of ultrasonic dispersion, the solution is slowly taken out and dried by dipping and pulling. Hydrophobic Nano SiO 2 Solution coated screen template. The obtained template is adhered to the cavity surface of the fixed mold 9 to form an injection mold A with a micro-nano composite structure template. Heat the injection mold A with the micro-nano composite structure template to 120°C, and inject the PP melt 10 into the closed cavity of the injection mold A with the micro-nano composite structure template through the injection molding machine to push the screw axis forward By means of shifting, apply a pressure ...

Embodiment 3

[0048] The implementation process of using the PP product 11 with a super-hydrophobic and medium-adherent injection surface of the present invention is as follows. 0.04g hydrophilic nano SiO 2 Particles 2 and 20ml of absolute ethanol 3 are prepared into a solution. After stirring, the two-stage composite microstructure template 13 is immersed in the solution. After 20 minutes of ultrasonic dispersion, it is slowly taken out and dried by dipping and pulling, so as to obtain the Water Nano SiO 2 Solution-coated two-stage composite microstructure template D. Hydrophilic Nano SiO 2 The solution-coated two-stage composite microstructure template D is adhered to the cavity surface of the fixed mold 9 to form an injection mold A with a micro-nano composite structure template. Heat the injection mold A with the micro-nano composite structure template to 120°C, and use the injection molding machine to inject the PP melt 10 into the closed injection mold A with the micro-nano composite s...

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Abstract

The invention relates to a preparation method for a super-hydrophobic and adhesion-adjustable surface with a micro-nano composite structure. The preparation method comprises the following steps: a, preparing a dual-level composite microstructure template according to wetting characteristics needed by a product surface; b, preparing a solution from a hydrophilic / hydrophobic nanoparticle and absolute ethyl alcohol according to adhesion characteristics needed by the product surface, immersing the dual-level composite microstructure template into the solution, carrying out ultrasonic dispersion, then taking the treated microstructure template out and drying the treated microstructure template so as to obtain a three-level micro-nano composite structure template; c, fixing the obtained template on the surface of a die cavity, injecting high-molecular melt into the cavity by using an injection machine, carrying out pressure maintaining and then carrying out cooling and molding; and d, separating a molded high-molecular product from an injection die by using a demolding apparatus. The hydrophilic / hydrophobic nanoparticle is adhered on the surface or embedded into the surface layer of the dual-level composite microstructure on the surface of the molded high-molecular product, and the molded high-molecular product surface has the characteristics of super-hydrophobicity and adjustable adhesion and can realize flexible switching between a lotus leaf effect and a petal effect.

Description

Technical field [0001] The invention relates to a technique for preparing a superhydrophobic surface, in particular to an injection molding technique that uses a tertiary micro-nano composite structure formed by hydrophilic / hydrophobic nanoparticles attached to the surface of a two-level composite microstructure template as a template to prepare a superhydrophobic surface And the method and application of adhesive adjustable polymer products. Background technique [0002] In nature, the surface of lotus leaf and rice leaf have super hydrophobic properties. The two key factors leading to this property are the surface geometric micro-nano structure and low surface free energy. The dynamic contact characteristics (characterized by the rolling angle) of superhydrophobic solid surfaces with different microstructures are different. If the surface of the lotus leaf with super-hydrophobic and low-adhesion properties has a static contact angle greater than 150° and a rolling angle less t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/00B29C45/00B29B13/00B29B13/06
Inventor 黄汉雄陈安伏关伟盛
Owner SOUTH CHINA UNIV OF TECH
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