Global Desalination Research Center (GDRC), School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea.
K-water Institute, 200 Sintanjin-ro, Daedeok-Gu, Daejeon, 34350, Republic of Korea.
Chemosphere. 2019 Jul;227:662-669. doi: 10.1016/j.chemosphere.2019.04.081. Epub 2019 Apr 12.
This work investigated the synergistic effect of polyvinylpyrrolidone (PVP) and hydroxypropyl-beta-cyclodextrin (HP-β-CD) as dual pore forming agents on the properties and performance of polysulfone (PSf) ultrafiltration membranes. A fixed concentration of PVP and varying concentrations of HP-β-CD were used to prepare the membranes using the phase inversion technique. The results showed that the inclusion of these additives in the dope solution increased its thermodynamic instability and promoted instantaneous demixing. Overall, an increase was observed in the hydrophilicity, open porous structure and mechanical strength of the membranes. Cross-flow filtration tests demonstrated that the pure water permeability of the fabricated membrane was 891 LMH bar, about 4.37 times higher than the pristine membrane, while bovine serum albumin (BSA) rejection was relatively constant (about 93%) for all the fabricated membranes. This work proposed that the addition of HP-β-CD and PVP as dual pore formers can produce a viable ultrafiltration membrane with improved water permeability without a middle ground on rejection potential.
这项工作研究了聚乙烯吡咯烷酮（PVP）和羟丙基-β-环糊精（HP-β-CD）作为双重致孔剂对聚砜（PSf）超滤膜性能的协同效应。采用相转化技术，使用固定浓度的 PVP 和不同浓度的 HP-β-CD 来制备膜。结果表明，这些添加剂在铸膜液中的加入增加了其热力学不稳定性，促进了瞬时相分离。总的来说，膜的亲水性、开放多孔结构和机械强度都有所提高。错流过滤测试表明，所制备膜的纯水透过率为 891LMHbar，比原始膜高约 4.37 倍，而所有制备膜的牛血清白蛋白（BSA）截留率相对恒定（约 93%）。这项工作提出，添加 HP-β-CD 和 PVP 作为双重致孔剂可以在不影响截留潜力的情况下，生产出具有改善水渗透性的可行超滤膜。
