Preparation of poly(phthalazinone-ether-sulfone) sponge-like ultrafiltration membrane.
Preparation of poly(phthalazinone-ether-sulfone) sponge-like ultrafiltration membrane.
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DOI：
10.1021/la400324b
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
Peiyong Qin;Xinjun Hong;M. Nazmul Karim;T. Shintani;Ji-ding Li;Cuixian Chen
中科院分区：
文献类型：
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作者：
Peiyong Qin;Xinjun Hong;M. Nazmul Karim;T. Shintani;Ji-ding Li;Cuixian Chen
二氮杂萘酮聚醚砜（PPES）是一种新型的含双（4-氟二苯基）砜基团的聚合物。通过湿相转化形成PPES膜可以根据缓慢或快速凝胶化方法进行。这些形成机制进行了实验研究。使用光学显微镜和扫描电子显微镜对所得膜的形态进行了研究。研究了PPES浓度、聚乙烯吡咯烷酮（PVP）和草酸（OA）对PPESK/NMP溶液表观粘度、凝胶速率及膜性能的影响。发现凝胶化速率对于获得海绵状膜结构是重要的，然而快速凝胶化速率有利于获得海绵状膜结构。通过快速凝胶化速率得到的膜显示出高纯水通量和牛血清白蛋白（BSA）的排斥，与以前的研究结果相反。根据实验结果，关联了实际膜结构和纯水通量，并分别与光学显微镜和凝胶速率相一致。目前的结果为这种新型共聚物提供了基本的见解，可用于未来的应用，特别是在成膜过程中。
Poly(phthalazinone-ether-sulfone) (PPES) polymer is a relatively newly developed material with a bis(4-fluorodiphenyl) sulfone group. The formation of the PPES membrane by wet-phase inversion can proceed according to a slow or fast gelation method. These formation mechanisms were studied experimentally. The resulting membrane morphology was investigated using both optical and scanning electron micrography. The effects of PPES concentration and two additives, polyvinylpyrrolidone (PVP) and oxalic acid (OA), on the apparent viscosity and gelation rate of PPESK/NMP solutions and membrane performance have also been investigated. It was found that the gelation rate is important to obtain a sponge-like membrane structure, however favored by a fast gelation rate. The membrane obtained by a fast gelation rate showed a high pure water flux and rejection of bovine serum albumin (BSA), contrary to previous findings. On the basis of the experimental results, the actual membrane structure and pure water flux were related, and in agreement with the optical micrograph and gelation rate, respectively. The current results provide a fundamental insight in this novel copolymer, useful in future applications, especially in the membrane formation process.