-
Compressive Behaviors of Micropillar Patterns Made of PDMS Material using the Finite Element Method
- Back
Document Title
Compressive Behaviors of Micropillar Patterns Made of PDMS Material using the Finite Element Method
Author
Pakawan T, Puttapitukporn T, Atthi N, Sripumkhai W, Pattamang P, Klunngien N, Jeamsaksiri W
Name from Authors Collection
Scopus Author ID
35488706300
Affiliations
Kasetsart University; National Science & Technology Development Agency - Thailand; National Electronics & Computer Technology Center (NECTEC)
Type
Article
Source Title
ENGINEERING JOURNAL-THAILAND
ISSN
0125-8281
Year
2021
Volume
25
Issue
2
Open Access
gold, Green Published
Publisher
CHULALONGKORN UNIV, FAC ENGINEERING
DOI
10.4186/ej.2021.25.1.69
Format
Abstract
Hydrophobic surface is a surface having the ability of water repellent which is frequently coated on medical devices and marine structures. This hydrophobic surface can fabricate from micro-pattern sheets consisting of groups of micropillars arranged into unique micro-patterns which are normally made of low surface energy materials. Thai Microelectronics Center (TMEC) has fabricated micropillar sheets from PDMS for various micropillar array patterns from soft lithography techniques. However, these micropillar sheets were relatively weak under pushing forces. This research aimed to understand compressive behaviors of rectangular prism micropillars having different aspect ratios (ratio of width to length of a rectangular cross-section) and micro-patterns consisting of micropillars having rectangular cross-section and square cross-section by using ANSYS Mechanical APDL program. We found that the aspect ratio of prism micropillars had not influents on both elastic stiffness and compressive strength under compressive loading. The lateral collapse of micropillars were observed on all micro-patterns during compressive loading. Furthermore, the sharklet micro-pattern had the highest compressive strength with maximum compressive pressure of 9.87 kPa. Finally, as loading contact area of micro-patterns increases, the compressive strength increases while the water contact angle decreases.
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Thailand Graduate Institute of Science and Technology, National Science and Technology Development Agency [SCA-CO-2561-7124TH]; National Electronics and Computer Technology Center (NECTEC), Thailand [P1951452]
License
Copyright
Rights
Publisher
Publication Source
WOS