期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 325, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2023.124686
关键词
Antifouling zwitterionic copolymer; Steam sterilization; PVDF membrane; VIPS
Scientists synthesized a copolymer that can maintain its antifouling properties after steam sterilization, effectively mitigating biofouling in various situations. Moreover, the copolymer shows stable properties even at high temperatures.
Most antifouling membranes lose their bioinert properties after steam sterilization because common antifouling materials are sensitive to hydrolysis. Here, we synthesized a random zwitterionic copolymer containing poly (styrene), poly(ethylene glycol) methyl ether methacrylate and zwitterionic poly(4-vinylpyridine propylsulfobetaine). The resulting copolymer, poly(styrene-r-EGMA-r-4VPPS), was blended with poly(vinylidene difluoride) to form bi-continuous and bioinert PVDF membranes by vapor-induced phase inversion. The copolymer drastically enhanced the hydrophilicity of the membranes, as water could wet the porous substrate entirely (WCA 0 for the zwitterionic membrane vs. about 144 degrees for the virgin membrane). When exposed to Escherichia coli, Stenotrophomonas maltophilia, whole blood or HT1080 cells, fouling on the non-sterilized modified membranes was reduced by 95 %, 98 %, 99 % and 99 %, respectively. After sterilization, the antifouling properties were maintained. Results of cyclic water/Escherichia coli filtrations indicated that the non-sterilized modified membrane showed a flux recovery ratio of 57 %, against 21 % for a commercial membrane. Importantly, these performances were maintained after sterilization. The copolymer is not only efficient at mitigating biofouling in various situations, but also shows stable properties after autoclaving, which is paramount for membranes to be applied in the biomedical field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据