Ultrafiltration membranes with tunable morphology and performance prepared by blending quaternized cardo poly(arylene ether sulfone)s ionomers with polysulfone
Ultrafiltration membranes with tunable morphology and performance prepared by blending quaternized cardo poly(arylene ether sulfone)s ionomers with polysulfone
复制标题
季铵化cardo聚芳醚砜离聚物与聚砜共混制备形貌和性能可调的超滤膜
DOI：
10.1016/j.seppur.2017.01.066
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发表时间：
2017
影响因子：
8.6
通讯作者：
Zhang Suobo
中科院分区：
文献类型：
--
作者：
Liu Chunli;Mao Hongchao;Zhu Jianhua;Zhang Suobo
以原季铵化cardo聚芳醚砜（QPES-I）离子为原生聚电解质，将其反离子（I−）与F−和PF6−交换，制备不同阴离子（QPES-X, X = F, PF6）的QPES，然后采用非溶剂诱导相转化法制备QPES-X/PSF混合超滤膜。利用扫描电子显微镜（SEM）对共混膜的截面形貌和表面形貌进行表征，利用原子力显微镜（AFM）分别获得QPES-X/PSF共混膜的三维图像。用x射线光电子能谱（XPS）研究了不对称膜的表面化学成分。在相同的制备条件下，膜表面的水接触角大小依次为QPES-F < QPES-I < PSF < QPES-PF6，而膜的纯水通量大小依次为减小。结果表明，共混膜的表面和截面形貌、表面粗糙度、QPES-X在膜表面的含量、亲水性和性能与QPES-X的反离子密切相关。用QPES-F制备的膜具有亲水性，在所有材料中具有优异的性能，在聚合物浓度为18%，QPES-F含量为15%时，水通量为2163 L m−2h−1，BSA去除率为93%。抗菌活性研究表明，含有15% QPES-F的混合膜对大肠杆菌的灭菌率为73%。
The original quaternized cardo poly(arylene ether sulfone)s (QPES-I) ionomers was employed as the virgin polyelectrolyte and its counterions (I−) were exchanged with F−and PF6−to prepare QPES with different anions(QPES-X, X = F, PF6), then QPES-X/PSF blended ultrafiltration membranes was prepared by the nonsolvent induced phase inversion process. Scanning electron microscopy (SEM) was used to characterize the cross section morphology and surface morphology of blended membranes, and atom force microscopy (AFM) was employed for obtaining the three-dimensional images of QPES-X/PSF blended membranes, respectively. The surface chemical composition of the asymmetric membrane was investigated by X-ray photoelectron spectroscopy (XPS). Under similar preparation conditions, the water contact angle on membrane surface increased in the order of QPES-F < QPES-I < PSF < QPES-PF6, while the pure water flux of the membranes decreased with that order. The results revealed that the surface and cross section morphology, surface roughness, QPES-X content on membrane surface, as well as the hydrophilicity and performance of blended membranes were closely related to the counterions of QPES-X. Membrane prepared with QPES-F is hydrophilic and possesses outstanding performance among all the investigated materials, demonstrating a water flux of 2163 L m−2h−1and BSA rejection of 93% at an 18 wt% polymer concentration and 15% QPES-F content. Antimicrobial activity studies demonstrate that the blended membrane having 15% QPES-F possess a sterilization rate of 73% towardsE.coli.