Wet gradient surface preparation method integrating waviness with chemical gradient

A chemical gradient and gradient surface technology, applied in the field of material surface modification, can solve the problems of inability to achieve precise directional wetting, performance needs to be improved, etc., and achieve the effect of economical, reliable and simple preparation method

Inactive Publication Date: 2017-08-22
ZHEJIANG UNIV OF TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of wetting gradient surfaces can be mainly divided into two types, that is, controlling the chemical composition of the surface and changing the microscopic morphology of the surface. There are many problems in the single-gradient wettability surface prepared by these two methods, and the performance...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wet gradient surface preparation method integrating waviness with chemical gradient
  • Wet gradient surface preparation method integrating waviness with chemical gradient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Refer to attached picture. Embodiment 1 This embodiment comprises the following steps:

[0020] Step (1) Preparation of coating liquid: Mix and stir the prepolymer of polydimethylsiloxane and crosslinking agent at a mass ratio of 10:1, then place it in a vacuum drying oven and use a vacuum pump for 20 minutes to remove bubbles in the solution to prepare a polydimethylsiloxane coating solution;

[0021] Step (2) Spin coating PDMS coating solution: the selected substrate is glass substrate 3, and it is pre-cleaned, that is, the glass substrate is ultrasonicated in acetone, absolute alcohol, and deionized water for 10-20 minutes, and the ultrasonic frequency is 50~ 100Hz, and then washed with water and dried; the coating solution prepared in step (1) was evenly coated on the surface of the glass substrate by spin coating. The rotation speed is 8000 rad / min, the spin coating time is 20s, and then the glass substrate spin-coated with the coating solution is dried at a temp...

Embodiment 2

[0025] Example 2 The difference from Example 1 is that a flexible corrugated structure is prepared on the basis of VHB double-sided adhesive tape, a wedge-shaped shielding plate is placed on the surface of the flexible corrugated structure, and the flexible corrugated structure is treated with plasma, so that A wetting gradient is formed and a wavy wetting gradient surface is prepared.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a wet gradient surface preparation method integrating waviness with chemical gradient. The wet gradient surface preparation method comprises the following steps: step (1) preparing a coating solution of polydimethyl siloxane; step (2) performing coating solution spin-coating; step (3) preparing a flexible wavy structure; step (4) preparing shielding plate; and step (5) preparing a surface integrating chemical gradient with the flexible wavy structure. According to the preparation method disclosed by the invention, the flexible material is adopted, and the flexible material is utilized to generate the wavy structure in the stress directions at the two sides, so that motion barriers at the two sides of liquid drop are improved; and plasma treatment is utilized to obtain a chemical gradient micro structure surface, so that liquid drop spreads in single direction; and the side surfaces of the wavy structure are of trigonometric function types.

Description

technical field [0001] The invention belongs to the field of material surface modification, and in particular relates to a wettability gradient surface preparation method combining wave shape and chemical gradient. Background technique [0002] The wettability gradient surface is a high-performance surface whose composition, structure, and wettability change continuously or stepwise with space. The surface tension is not equal, which leads to the tendency and ability of the liquid to flow automatically from the place of low surface energy to the place of high surface energy. Therefore, wettability gradient surfaces have been widely used in biocompatibility, diagnostics, nanotribology, microfluidics, liquid self-transportation, etc., especially in liquid droplet and microfluidic migration (flow) and enhanced gas phase droplet condensation. There are important applications in the heat transfer process and the heat dissipation performance of micro heat pipes. [0003] At pres...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08J7/12C08J7/00C08L83/04C03C17/30
CPCC08J7/123C03C17/30C08J7/00C08J2383/04
Inventor 吴化平杨哲王有岩梁利华刘爱萍鲁聪达丁浩张征李吉泉曹彬彬
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap