Siam Physics Congress 2017

Enhance of hydrophilicity property for gas separation membrane by DC plasma

24 May 2017, 15:10

50m

Rayong Marriott Resort & Spa

Poster Plasma and Ion Physics, Nuclear and Radiation Physics Poster Presentation I

Speaker

Mrs Soraya Ruangdit (-)

Description

Preparation and surface modification of Polysulfone (PSF) membranes by DC plasma were conducted in order to improve membrane hydrophilicity and gas permeation efficiency. Different type of oxygen (O${}_2$), Argon (Ar), Argon (Ar)/oxygen (O${}_2$) mixture plasma and plasma sequence of O${}_2$ and Ar gasses were employed to modify the membrane surfaces. Characteristics of membrane samples were evaluated through various analytical techniques. Membrane hydrophilicity was determined by water contact angle (WCA) measurement while Fourier transform infra-red (FTIR) spectroscopy was used to analyze the functional groups on the modified surface membrane. We studied the aging condition by measuring the WCA of the plasma-treated surface membrane that recovering to the original condition. For gas separation, the result shows that the permeability of CO${}_2$ is higher than of CH${}_4$ that were explained by electronic properties, polarizability and quadrupole moment. Result also indicated that while the gas permeability of the treated membrane by DC plasma was enhanced but the selectivity of CO${}_2$/CH${}_4$ show a lower performance.