Ang Micah Belle Marie Yap, Devanadera Kiara Pauline O, Duena Alyssa Nicole R, Luo Zheng-Yen, Chiao Yu-Hsuan, Millare Jeremiah C, Aquino Ruth R, Huang Shu-Hsien, Lee Kueir-Rarn
R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan.
School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila 1002, Philippines.
Membranes (Basel). 2021 Jan 22;11(2):80. doi: 10.3390/membranes11020080.
In this study, cellulose acetate (CA) mixed-matrix membranes were fabricated through the wet-phase inversion method. Two types of montmorillonite (MMT) nanoclay were embedded separately: sodium montmorillonite (Na-MMT) and organo-montmorillonite (O-MMT). Na-MMT was converted to O-MMT through ion exchange reaction using cationic surfactant (dialkyldimethyl ammonium chloride, DDAC). Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) compared the chemical structure and composition of the membranes. Embedding either Na-MMT and O-MMT did not change the crystallinity of the CA membrane, indicating that the nanoclays were dispersed in the CA matrix. Furthermore, nanoclays improved the membrane hydrophilicity. Compared with CA membrane, CA membrane had a higher separation efficiency and antifouling property. At the optimum concentration of O-MMT in the CA matrix, the pure water flux reaches up to 524.63 ± 48.96 L∙m∙h∙bar with over 95% rejection for different oil-in-water emulsion (diesel, hexane, dodecane, and food-oil). Furthermore, the modified membrane delivered an excellent antifouling property.
在本研究中，通过湿相转化法制备了醋酸纤维素（CA）混合基质膜。分别嵌入了两种类型的蒙脱石（MMT）纳米粘土：钠蒙脱石（Na-MMT）和有机蒙脱石（O-MMT）。通过使用阳离子表面活性剂（二烷基二甲基氯化铵，DDAC）的离子交换反应将Na-MMT转化为O-MMT。衰减全反射傅里叶变换红外光谱（ATR-FTIR）和X射线光电子能谱（XPS）比较了膜的化学结构和组成。嵌入Na-MMT和O-MMT均未改变CA膜的结晶度，这表明纳米粘土分散在CA基质中。此外，纳米粘土改善了膜的亲水性。与CA膜相比，CA膜具有更高的分离效率和抗污染性能。在CA基质中O-MMT的最佳浓度下，纯水通量达到524.63±48.96 L∙m∙h∙bar，对不同的水包油乳液（柴油、己烷、十二烷和食用油）的截留率超过95%。此外，改性膜具有优异的抗污染性能。
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