Optical and wettability properties of polymers with varying surface energies

Published DateApplied Surface Science

30 September 2015, Vol.350:115–120, doi:10.1016/j.apsusc.2015.02.150

SATF2014 : Science and Applications of Thin Films, Conference & Exhibition

Author 

• Elbruz Murat Baba ^a
• C. Elif Cansoy ^b,,,
• Esra Ozkan Zayim ^a,c

• aIstanbul Technical University, Nanoscience & Nanotechnology Programme, Istanbul, Turkey
• bPiri Reis University, Faculty of Science and Letters, Istanbul 34940, Turkey
• cIstanbul Technical University, Faculty of Science and Letters, Physics Department, Istanbul 34469, Turkey

Received 31 October 2014. Revised 6 February 2015. Accepted 24 February 2015. Available online 28 February 2015. 

Highlights

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  Wettabilities of polymers with various surface free energies were examined.
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  Optical properties of polymers with varying surface free energies were investigated.
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  Polymer thin films have relatively large optical transmittance values for all spectra.

Abstract

In this study, flat and transparent thin films of polymers with varying surface free energies were prepared from their solutions to investigate their wettabilities and optical properties. Surface free energies of polymers were calculated by using van Oss, Good, and Chaudhury method. The increase in surface free energy values of polymers caused a decrease in water CA's of polymers due to high adhesion interactions between the solid surface and the water droplet. In addition, lower CAH values were calculated for each polymer film due to the flat morphologies of surfaces. Herein, the absorption of the films occurred in the wavelengths below ∼300 nm, beyond which these films demonstrated excellent transparency, characteristic for wide direct band gap materials for the optical application.

Keywords

• Surface free energy
• Contact angle
• Polymers
• Optical constants

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  Corresponding author. Tel.: +90 216 581 0050x1390; fax: +90 216 581 0051.

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