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

A technology of micro-nano composite structure and composite micro-structure, which can be applied to coatings and other directions, can solve the problems of limited regulation of surface adhesion characteristics of polymer products, and achieve the effects of excellent super-hydrophobic performance, simple process and broad application prospects.

Active Publication Date: 2016-04-13
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 superhydrophobic and adjustable adhesion surface with micro-nano composite structure
  • Preparation method and application of superhydrophobic and adjustable adhesion surface with micro-nano composite structure
  • Preparation method and application of superhydrophobic and adjustable adhesion 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 of preparing super-hydrophobic high-adhesion surface by using the present invention is shown. The equipment required for the implementation 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 oscillator 6 and an oven 7 . The injection mold A with the micro-nano composite structure template is connected with the injection molding machine. The injection mold A with the micro-nano composite structure template includes a fixed mold 8, a movable mold 9 and a hydrophilic nano-SiO 2 Solution-coated screen formwork B, provided with heating, cooling and demolding devices (not shown in the figure). The hydrophilic nano-SiO 2 The solution-coated screen template B includes a screen template 1 with a mesh number of 1800 and hydrophilic nano-SiO attached thereto 2 particle 2.

[0041] The implemen...

Embodiment 2

[0044] The implementation process of using the PP product 11 with super-hydrophobic and low-adhesion injection molding surface of the present invention is as follows. 0.6g of hydrophobic nano-SiO 2 Particles 2 and 20ml of absolute ethanol 3 were prepared into a solution, and after stirring evenly, the sieve template 1 with a mesh number of 3000 was immersed in the solution, and after being ultrasonically dispersed for 20 minutes, it was slowly taken out by dipping and pulling method and dried to obtain Hydrophobic nano-SiO 2 Solution coated screen formwork. The obtained template is bonded 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, inject PP melt 10 into the closed cavity of the injection mold A with the micro-nano composite structure template through the injection molding machine, so as to push the screw shaft forward...

Embodiment 3

[0048] The implementation process of using the superhydrophobic and medium-adhesive PP article 11 of the present invention is as follows. 0.04g of hydrophilic nano-SiO 2 Particles 2 and 20ml of absolute ethanol 3 were prepared into a solution, and after stirring evenly, the two-stage composite microstructure template 13 was immersed in the solution, and after being ultrasonically dispersed for 20 minutes, it was slowly taken out by dipping and pulling method, and then dried to obtain the Water nano-SiO 2 Solution-coated dual-stage composite microstructure template D. Hydrophilic nano-SiO 2 The solution-coated two-stage composite microstructure template D is bonded to the cavity surface of the fixed mold 9 to form an injection mold A with a micro-nano composite structure template. The injection mold A with the micro-nano composite structure template is heated to 120°C, and the PP melt 10 is injected into the closed injection mold A with the micro-nano composite structure tem...

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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 technology for preparing a superhydrophobic surface, in particular to a method of preparing a superhydrophobic surface using injection molding technology, using a three-stage micro-nano composite structure formed by attaching hydrophilic / hydrophobic nanoparticles to the surface of a two-stage composite microstructure template as a template. A method and application of a polymer article with adjustable adhesion. Background technique [0002] In nature, surfaces such as lotus leaves and rice leaves have super-hydrophobic properties, and the two key factors leading to this property are the surface geometric micro-nano structure and low surface free energy. There are differences in the dynamic contact characteristics (characterized by rolling angle) between superhydrophobic solid surfaces with different microstructures and water. If the static contact angle of the lotus leaf surface with superhydrophobic and low adhesion propert...

Claims

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Application Information

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Patent Type & Authority Patents(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