Wettability of porous polydimethylsiloxane surface: morphology study

Two methods used for producing porous polydimethylsiloxane (PDMS) surfaces. In the first method, PDMS films without photosensitizer was exposed to CO 2-pulsed laser at room temperature, as the excitation source. In the second method applying NaCl solid particles to the external surface layer before...

Full description

Saved in:
Bibliographic Details
Published in:Applied surface science 2005-04, Vol.242 (3), p.339-345
Main Authors: Khorasani, M.T., Mirzadeh, H., Kermani, Z.
Format: Article
Language:English
Subjects:
Chain ordering
Hydrophobic
Laser treatment
PDMS
Porosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two methods used for producing porous polydimethylsiloxane (PDMS) surfaces. In the first method, PDMS films without photosensitizer was exposed to CO 2-pulsed laser at room temperature, as the excitation source. In the second method applying NaCl solid particles to the external surface layer before it is cured. In this study the morphology, wettability and surface chemical characteristics have been investigated. These surfaces have been studied by performing scanning electron microscopy (SEM) and attenuated total reflectance infrared (ATR-FTIR) spectroscopy. To evaluate the surface wettability, the water drop contact angle was measured. SEM photomicrographs and ATR-FTIR spectra and water drop contact angle measurement show that the morphology of these surfaces change to a uniform porous surface and wettability decreased. Results indicated that the porosity and morphology are important factor in wettability of PDMS surface and laser irradiation cause ordering in molecular chains onto the PDMS surface and this surface is a superhydrophobic compared to the virgin PDMS surface.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2004.08.035