水凝胶涂层改性NF油水分离膜研究
Study on Hydrogel Coating Modified NF Membrane for Oil-Water Separation
DOI: 10.12677/ms.2026.167154, PDF,   
作者: 张 伟, 杜国勇：克拉玛依职业技术学院石油化学工程分院，新疆 克拉玛依
关键词: PVA；TA；超亲水/水下超疏油；油水分离；复合膜；PVA； TA； Superhydrophilic/Underwater Superoleophobic； Oil-Water Separation； Composite Membrane
摘要: 研究开发了一种利用乙醇/水混合溶剂体系制备的稳定水凝胶涂层，用于改性泡沫镍(NF)膜。该溶剂体系通过暂时抑制PVA与TA的氢键交联，延缓凝胶化，形成均匀前驱体涂层。同时，引入纳米SiO2提升表面粗糙度和凝胶稳定性。NF/PVA-TA-SiO2膜具有超亲水性(水接触角0˚)及水下超疏油性(油接触角152.4˚)，对多种油水混合物的分离效率 > 99%，对水包油乳液的分离效率为98.16%、通量达1534.2 L·m−2·h−1。在pH = 2~12和3.5 wt% NaCl中浸泡12 h及30次磨损循环后，仍保持优异润湿性及高分离效率，表现出良好的耐酸碱盐性和机械稳定性。
Abstract: This study developed a stable hydrogel coating prepared in an ethanol/water mixed solvent system to modify nickel foam (NF) membranes. The solvent system temporarily inhibits hydrogen bond crosslinking between PVA and TA, delaying gelation to form a uniform precursor coating. Nano-SiO2 was introduced to enhance surface roughness and gel stability. The NF/PVA-TA-SiO2 membrane exhibits superhydrophilicity (water contact angle: 0˚) and underwater superoleophobicity (oil contact angle: 152.4˚). It achieves > 99% separation efficiency for various oil-water mixtures and 98.16% efficiency for oil-in-water emulsions, with a flux of 1534.2 L·m−2·h−1. After immersion in pH 2~12 solutions and 3.5 wt% NaCl for 12 hours, as well as 30 abrasion cycles, the membrane maintains excellent wettability and high separation efficiency, demonstrating robust acid/alkali/salt resistance and mechanical stability.
文章引用：张伟, 杜国勇. 水凝胶涂层改性NF油水分离膜研究[J]. 材料科学, 2026, 16(7): 44-51. https://doi.org/10.12677/ms.2026.167154

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