Surface Modification of Asymmetric Polysulfone Membrane by UV Irradiation

Authors

  • Sutthisa Konruang Department of Physics, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
  • Thawat Chittrakarn Membrane Science and Technology Research Center, Prince of Songkla University, Songkhla 90112, Thailand
  • Suksawat Sirijarukul Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok 10400, Thailand

DOI:

https://doi.org/10.11113/jt.v70.3435

Keywords:

Surface modification, asymmetric polysulfone membrane, UV irradiation, water flux, hydrophilicity

Abstract

The effects of ultraviolet (UV) irradiation for surface modification of hydrophobic asymmetric polysulfone membranes have been investigated. The asymmetric polysulfone (PSF) membranes were prepared by phase inversion method using 19%-25% of PSF in two solvents, viz. dimethylacetamide (DMF) and Acetone (Ac) collectively. The surface of asymmetric polysulfone membranes were modified by UV ray with 254 and 312 nm wavelength. Chemical and physical properties of the untreated and the treated membranes were characterized. Scanning electron microscope (SEM) was used to determine asymmetric structure of polysulfone membranes. Contact angle device was used to analyzed the effected of UV ray treatment on hydrophilicity of membranes surface. Polar functional groups introduced by UV irradiation were examined using FTIR. The water flux was measured under a pressure of 500 kPa to 2,500 kPa with a feed temperature of 25°C. It was shown that asymmetric polysulfone membranes were produced and the UV ray treatment significantly alters the hydrophilicity of membranes surface indicated by the reduction of water contact angle with increasing treatment time. The FTIR analysis showed the formations of polar functional groups such as hydroxyl and carbonyl groups. Consequently, the surface of asymmetric polysulfone membranes was changed from hydrophobic to hydrophilic by UV irradiation leading to the enhancement of the water flux.

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Published

2014-09-02

How to Cite

Surface Modification of Asymmetric Polysulfone Membrane by UV Irradiation. (2014). Jurnal Teknologi, 70(2). https://doi.org/10.11113/jt.v70.3435