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Study on the Gas Permeation Behaviors of Surface Fluorinated Polysulfone Membranes  

Kim, Dae-Hoon (Department of Chemical Engineering, Hannam University)
Im, Hyeon-Soo (Department of Chemical Engineering, Hannam University)
Kim, Min-Sung (Department of Chemical Engineering, Hannam University)
Lee, Byung-Seong (Department of Chemical Engineering, Hannam University)
Lee, Bo-Sung (Department of Chemical Engineering, Hannam University)
Yoon, Seok-Won (Department of Chemical Engineering, Hannam University)
Kim, Beom-Sik (Green Chemistry Division, Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Park, You-In (Green Chemistry Division, Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Cheong, Seong-Ihl (Department of Chemical Engineering, Hannam University)
Rhim, Ji-Won (Department of Chemical Engineering, Hannam University)
Publication Information
Polymer(Korea) / v.33, no.6, 2009 , pp. 537-543 More about this Journal
Abstract
The direct fluorination of polymers is a heterogeneous reaction using the mixture of $F_2$ and inert gas. In general, the resulting fluorinated polymers have good barrier property chemical stability similar to those of the fluoro-polymers, and could be prepared from the simple process. In this study, the polysulfone dense films were surface fluorinated using the direct fluorination technique and gas permeability and selectivity of the prepared membranes were measured with varying both $F_2$ concentration and reaction time. The introduction of $F_2$ was confirmed by X-ray photoelectron spectroscopy (XPS), water contact angles, and atomic force microscopy (AFM). As the $F_2$ increased, the permeability decreased while the selectivities for $O_2$, $CO_2$, and He gases relative to $N_2$ increased.
Keywords
gas separation; direct fluorination; polysulfone; surface modification;
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