有機溶劑對氟素微過濾膜溶液透過行為之影響

Effect of Aqueous Organic Solvents on the Solution Permeation through Fluoropolymer Microfiltration Membranes

巫聖炫(Hsuan-Sheng Wu)

指導教授 ： 童國倫

中原大學/工學院/化學工程學系/碩士(2008年)

https://doi.org/10.6840/cycu200900137

摘要

本研究主在探討有機溶劑於純化或回收之過濾程序時，濾膜受溶劑影響的形態變化，期能在提供相關產業在濾材選用上有所依循。首先，本實驗所使用的膜材以選擇耐溶劑與抗化性較佳的PTFE及PVDF兩種膜為主，依序針對有機溶劑在不同濃度時其黏度與粒子特性做探討，進而模擬在各種條件下，溶劑對過濾模組的影響，包含濾速、阻擋率、膜材孔洞變化等。研究發現，當溶劑中水分含量高低，會使膜材孔洞產生縮小或變寬現象，進而影響其濾速上的差異。且在不同濃度及pH值的影響下，會促使PTFE及PVDF膜孔產生形態上的變化，這些都會對粒子過濾的效能產生影響。

關鍵字

IPA ； PTFE ； PVDF ； 廢液 ； 有機溶劑

並列摘要

This study examines the effect of aqueous organic solvents on the changes of membrane morphology and membrane permeability during the pretreatment process of waste solvent filtration in order to provide the criteria of membrane selection for end user. Two types of fluoropolymer microfiltration membranes expended poly(tetraflouroethylene) (ePTFE) and poly(vinylidene fluoride) (PVDF) with good chemical resistance were adopted for this study. Dead-end filtration experiments were conducted with aqueous organic solvents containing SiO2 particles. Density and viscosity of various concentrations of aqueous organic solvents were measured before each filtration tests. The membrane properties of pore size and pore size distribution, surface contact angle, surface charge were measure for each membrane under various solution conditions. Results showed that the increase of water contain will cause swelling of membrane materials and resulted in a decrease of pore size. This change of membrane morphology caused by aqueous organic solvent resulted in a drastic change of filtration behavior to each membranes under various operation conditions.

並列關鍵字

IPA ； PTFE ； PVDF ； Organic solvent ； Waste liquid

參考文獻

[21] 童國倫，「奈米過濾的發展及其應用」，化工技術：51(3)，26-36，(2004a)。

[23] 童國倫，「膜過濾模組之簡介及其設計」，化工技術：52(1)，31-46，(2005)。

[1] David R. Lide., “CRC Handbook of Chemistry and Physics, 74th ed., “London, (1993).

[2] Derjaguin, B. V, and Landua, L., “Theory of the stability of strongly charged lyophobic sols and of the adhesion of strongly charged particles in solution of electrolytes, “Acta. Physiochim. ,14,633 (1941).

[3] Eiji Iritani, Yasuhito Mukai, Munetaka Kamiya* and Nobuyuki Katagiri; ” Properties of a filter cake formed in dead-end microfiltration of colloidal particles suspended in aqueous organic solvents”, J. Chem. Eng. Japan., 38, 271-277 (2005).