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Critical Breakthrough Pressure through Porous Polymer Membrane  

Lee, Yong-Taek (Department of Chemical Engineering, Chungnam National University)
Jeon, Hyun-Soo (Department of Chemical Engineering, Chungnam National University)
Ahn, Hyo-Seong (Department of Chemical Engineering, Chungnam National University)
Lee, Young-Jin (Department of Chemical Engineering, Chungnam National University)
Song, In-Ho (Department of Chemical Engineering, Chungnam National University)
Lee, Hyung-Keun (Korea Institute of Energy Research)
Publication Information
Membrane Journal / v.16, no.4, 2006 , pp. 259-267 More about this Journal
Abstract
The critical breakthrough pressure through both porous PVDF (polyvinylidenefluoride) and PTFE (poly-tetrafluoroethylene) was measured using pure water, $0.1M{\sim}4.0M$ NaOH aqueous solutions and $0.1M{\sim}3.0M\;NaHSO_3$ aqueous solutions. The critical breakthrough pressure through PTFE was observed to be higher than that through PVDF membrane at the same pore size. The critical breakthrough pressure decreased as the molar concentration of NaOH increased up to 1.0 M reaching the minimum and then increased further after 1.0 M NaOH up to 4.0 M NaOH. On the other hand, the critical breakthrough pressure measured using $NaHSO_3$ aqueous solutions was decreased with increasing the concentration of $NaHSO_3$. The critical breakthrough pressure could be well interpreted with Cantor's equation.
Keywords
critical breakthrough pressure; contact angle; surface tension; porous polymer membrane;
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