Fabrication of cellulose acetate-zirconia hybrid membranes for ultrafiltration applications: Performance, structure and fouling analysis
Fabrication of cellulose acetate-zirconia hybrid membranes for ultrafiltration applications: Performance, structure and fouling analysis
复制标题
DOI：
10.1016/j.seppur.2010.06.010
复制
发表时间：
2010-08-17
影响因子：
8.6
通讯作者：
Thanikaivelan, P.
中科院分区：
文献类型：
--
作者：
Arthanareeswaran, G.;Thanikaivelan, P.
使用不同比例的醋酸纤维素（CA）和氧化锆（ZrO2）在N,N'-二甲基甲酰胺（DMF）中溶液浇铸制备有机-无机杂化膜。 CA 基质中 ZrO2 微粒的添加量为 0 至 7 wt.%。对所开发的膜进行了超滤（UF）性能、机械稳定性、形态和抗污染能力的表征。结果发现，纯CA中添加0%～7%的氧化锆后，纯水通量从15.6 lm(-2) h(-1)增加到46.7 lm(-2) h(-1)，而拉伸强度从2降低到1.4 N/mm(2)。形态学研究表明CA:ZrO2杂化膜具有超尺度孔的不对称结构。从孔径统计分析可以看出，CA:ZrO2（6:4比例）杂化膜的平均孔径为47.52埃，而纯CA膜的平均孔径为26.88埃。研究发现，与纯 CA 膜相比，混合 CA:ZrO2 膜在分离不同分子量蛋白质时表现出更高的渗透通量。事实证明，由于在铸膜溶液中添加ZrO2而具有高通量恢复率，因此CA:ZrO2杂化膜的抗污染能力和回收性能得到增强。 (C) 2010 Elsevier B.V. 保留所有权利。
Organic-inorganic hybrid membranes were fabricated by solution casting using different ratios of cellulose acetate (CA) and zirconia (ZrO2) in N,N'-dimethylformamide (DMF). The addition of ZrO2 microparticles in the CA matrix was varied from 0 to 7 wt.%. The developed membranes were characterized for ultrafiltration (UF) performance, mechanical stability, morphology and fouling-resistant ability. It is found that the pure water flux increases from 15.6 to 46.7 lm(-2) h(-1) while the tensile strength decreases from 2 to 1.4 N/mm(2) with addition of zirconia from 0 to 7 wt.% to pure CA, respectively. Morphological studies indicate that the CA:ZrO2 hybrid membranes possess asymmetric structure with ultra scale pores. From the pore statistics analysis, it was seen that the CA:ZrO2 (6:4 ratio) hybrid membranes have an average pore radius of 47.52 angstrom compared to 26.88 angstrom of pure CA membrane. It was found that the hybrid CA:ZrO2 membranes exhibit higher permeate flux for the separation of different molecular weight proteins compared to pure CA membrane. It has been demonstrated that the fouling-resistant ability and the recycling property of CA:ZrO2 hybrid membranes are enhanced due to the high flux recovery ratio with the addition of ZrO2 in the casting solution. (C) 2010 Elsevier B.V. All rights reserved.