Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Method for Obtaining Droplet Contact Angle on Regular Second-Order Structured Surface

A technology of structured surface and acquisition method, applied in instrumentation, design optimization/simulation, calculation, etc., can solve the problems of large result error and complicated process of measuring contact angle of solid surface.

Active Publication Date: 2019-09-20
CENT SOUTH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to achieve the above purpose, the embodiment of the present invention provides a method for obtaining the contact angle of a droplet on a surface with a regular second-order structure, which solves the defects of the experimental measurement process of the solid surface contact angle and the large error in the actual application.

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
  • A Method for Obtaining Droplet Contact Angle on Regular Second-Order Structured Surface
  • A Method for Obtaining Droplet Contact Angle on Regular Second-Order Structured Surface
  • A Method for Obtaining Droplet Contact Angle on Regular Second-Order Structured Surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0157] (1) In order to ignore the influence of gravity on the contact angle of the droplet on the solid surface, the volume of the droplet is taken as V=5μl, and the intrinsic contact angle of the material forming the second-order structure, that is, Young’s contact angle, is taken as θ Y =105° (different materials correspond to different intrinsic contact angles).

[0158] The geometric structure size parameters of the second-order structure are: the side length, spacing, and height of the top nanopillars are respectively a 1 =100nm,b 1 =90nm, h 1 = 200nm, the side length, pitch and height of the microcolumn are respectively a 2 =10μm,b 2 =9μm,h 2 =20μm, the side length, spacing and height of the bottom nanopillars are respectively a 3 =100nm,b 3 =90nm, h 3 = 200nm.

[0159] (2) For two different droplet infiltration modes in the second-order structure, the increment of the infiltration depth z is five percent of the length of each infiltration interval; for formula (...

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 an acquiring method for a regular second-order structure surface liquid drop contact angle. The method comprises steps of deduction of a fundamental assumption of any three-dimensional structural model thermodynamic analysis and a system relative free energy function, sweeping from the top to the bottom end of a second-order structure to elicit relative free energy function of a system under different segments according to differences of an infiltration model and infiltration depth of a liquid drop along a depth direction of the second-order structure, programming a second-order structure volume geometric constraint condition and the relative free energy function via Matlab software, seeking relative free energy of the system under different infiltration models and infiltration depths in a segmental way, and determining a system minimum free energy and a stable wetting state to achieve a relative balance contact angle. The acquiring method solves deficiencies of redundant test measuring process of solid surface contact angle and great result error in the practical application.

Description

technical field [0001] The invention belongs to the technical field of micro-nano composite structures, and relates to a method for obtaining the contact angle of liquid droplets on the surface of a regular second-order structure, in particular to a method for obtaining a regular second-order structure by calculating the relative free energy of a solid-liquid-gas three-phase contact system The droplet contact angle on the surface. Background technique [0002] Wettability is one of the important properties of solid surfaces and a common interfacial phenomenon. Due to the difference in wettability of solid surfaces, many functional surfaces will be produced, such as waterproof textiles, microfluidic devices, and dust-proof self-cleaning surfaces, etc., which play an important role in human daily life and industrial production. In general, the wettability of a solid surface is characterized by the contact angle of a liquid drop on it. The contact angle refers to the angle be...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 翁灿王飞杨冬娇蒋炳炎
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com