Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xian 710127, Shaanxi, PR China.
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xian 710127, Shaanxi, PR China; Institute of Materials Science and New Technology, Northwest University, Xian 710127, Shaanxi, PR China.
Water Res. 2022 Oct 1;224:119052. doi: 10.1016/j.watres.2022.119052. Epub 2022 Sep 3.
The development of high-flux, durable and completely self-cleaning membranes is highly desired for separation of massive oil/water mixtures. Herein, differently crosslinked poly(2-methacryloyloxylethyl phosphorylcholine) (PMPC) brush grafted stainless steel mesh (SSM) membranes (SSM/PMPCs) were fabricated by integrating of mussel inspired universal adhesion and crosslinking chemistry with surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET-ATRP). The durability and self-cleaning performance of the prepared SSM membranes were evaluated by separating sticky crude oil/water mixtures in a continuous recycling dead-end filtration device. The water filtration flux driven by gravity reached 60,000 L⋅m⋅h with a separation efficiency of over 99.98%. Furthermore, zero-flux-decline was observed during a 5 h continuous filtration when assisted by mechanical stirring. More significantly, such a completely self-cleaning separation of the well crosslinked SSM/PMPC2 membrane under optimized flux and stirring conditions had been operated cumulatively for 190 h in 30 days without any additional cleaning. These significant advances are more promising for practical applications in crude oil-contaminated water treatments and massive oil/water mixture separation.
对于大规模油水混合物的分离，人们非常希望开发高通量、耐用且完全自清洁的膜。在此，通过将贻贝启发的通用粘附和交联化学与表面引发的活性自由基聚合（SI-ARGET-ATRP）再生引发剂相结合，制备了不同交联的聚（2-甲基丙烯酰氧乙基磷酸胆碱）（PMPC）刷接枝不锈钢网（SSM）膜（SSM/PMPCs）。通过在连续循环死端过滤装置中分离粘性原油/水混合物来评估所制备的 SSM 膜的耐用性和自清洁性能。重力驱动的水过滤通量达到 60000 L⋅m⋅h，分离效率超过 99.98%。此外，在机械搅拌的辅助下，连续过滤 5 h 时，通量几乎没有下降。更重要的是，在优化通量和搅拌条件下，交联良好的 SSM/PMPC2 膜完全自清洁分离，在 30 天内累计运行 190 h 而无需额外清洗。这些显著的进展更有希望应用于处理受原油污染的水和大规模油水混合物的分离。
