One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect
One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect
复制标题
分级结构超亲水NF膜一步转变为超疏水OSN膜并提高防污效果
DOI：
10.1021/acsami.6b07106
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发表时间：
2016-09-07
影响因子：
9.5
通讯作者：
Zhang, Guojun
中科院分区：
文献类型：
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作者：
Guo, Hongxia;Ma, Yiwen;Zhang, Guojun
制备了聚乙烯亚胺/聚丙烯酸（PEI/PAA）水化硅酸钙（CSH）分级结构超亲水性多层膜（PEI/PAA-CSH）（n）作为水相纳滤膜，并通过三甲基全氟硅烷（PFTS）一步改性将其转化为超疏水性有机溶剂纳滤膜。对这些多层膜（PEI/PAA-CSH）（n）的表面结构和性能的研究表明，通过原位掺入CSH聚集体到PEI/PAA多层膜中制备的分级结构（PEI/PAA-CSH）（n）多层膜有利于其从超亲水性一步转变为超疏水性。两种超湿膜分别对染料水溶液和乙醇溶液表现出较好的纳滤膜截留性能。通过对甲基蓝（MB）、牛血清白蛋白（BSA）、腐殖酸（HA）水溶液和非水乙醇溶液的长期性能和截留行为的研究表明，超亲水膜和超疏水膜均具有较高的稳定性和优异的截留性能。
The hierarchical-structured superhydrophilic poly(ethylenimine)/poly(acrylic acid) (PEI/PAA)calcium silicate hydrate (CSH) Multilayered membranes (PEI/PAA-CSH)(n) were prepared as aqueous nanofiltration (NF) membrane, and then they were transformed into super hydrophobic organic solvent nanofiltration (OSN) membranes by one-step modification of trimethylperfluorinatedsilane (PFTS). Investigation on surface structures and properties of these multilayered membranes (PEI/PAA-CSH)(n) indicated that the hierarchical-structured (PEI/PAA-CSH)(n) multilayered membrane produced by in situ incorporation of CSH aggregates into PEI/PAA multilayers facilitated its one-step transformation from superhydrophilicity into superhydrophobicity. Both of the superwetting membranes showed better nanofiltration performances for retention of dyes of water and ethanol solution, respectively. Moreover, the long-term performance and antifouling behaviors, investigated by retention of methyl blue (MB), bovine serum albumin (BSA), and humic acid (HA) aqueous water solution and nonaqueous ethanol solution indicated that both of the superhydrophilic and superhydrophobic membrane showed higher stability and excellent antifouling property.