超声雾化喷涂法制备超薄桥联有机硅纳滤膜
邹佳成 , 何远恒 , 钟璟 , 潘阳 , 任秀秀 , 郭猛 , 徐荣
现代化工 ›› 2026, Vol. 46 ›› Issue (11) : 157 -163.
超声雾化喷涂法制备超薄桥联有机硅纳滤膜
Fabrication of ultrathin bridged organosilica nanofiltration membranes by adopting ultrasonic atomization spraying method
针对桥联有机硅纳滤膜传统制膜难以构筑超薄无缺陷层的挑战,提出利用超声雾化喷涂技术制备此类复合膜。为了克服硅溶胶孔渗效应,在聚偏二氟乙烯(PVDF)支撑体上沉积氧化石墨烯(GO)构建中间层,通过超声雾化喷涂将有机硅溶胶涂覆在表面,成功制备出连续完整且厚度可控(30~200 nm)的有机硅分离层。在纳滤过程中复合膜对刚果红的截留率高达99.46%,水渗透率为3.67 L/(m2·h·bar),表明超声雾化喷涂技术在制备高性能纳滤膜方面具有较好的应用潜力。
To address the challenge that traditional membrane fabrication makes it difficult to construct ultrathin defect-free layers for bridged organosilica nanofiltration membranes,the use of ultrasonic atomization spraying technology to prepare such composite membranes was proposed.To mitigate the pore penetration of silica sols,a graphene oxide (GO) interlayer was initially deposited onto a polyvinylidene fluoride (PVDF) support.Subsequently,the organosilica sol was coated onto this GO interlayer ultrasonic atomization spraying,resulting in a continuous,defect-free organosilica separation layer with tunable thickness (30-200 nm).The resulting composite membranes exhibited a high Congo Red rejection of 99.46% and a water permeance of 3.67 L/(m2·h·bar).This study demonstrates the great potential of ultrasonic atomization spraying method for fabricating high-performance nanofiltration membranes.
超声雾化喷涂 / 超薄膜 / 氧化石墨烯 / 桥联有机硅 / 纳滤
ultrasonic atomization spraying / ultrathin membranes / graphene oxide / bridged organosilicas / nanofiltration
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江苏省高等学校自然科学研究重大项目(22KJA530001)
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