Nanoprecipitation for ultrafiltration membranes
Nanoprecipitation for ultrafiltration membranes
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DOI：
10.1002/polb.23688
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Qifeng Wang;Sadaki Samitsu;Y. Fujii;C. Yoshikawa;T. Miyazaki;Hidekuni Banno;Izumi Ichinose
中科院分区：
文献类型：
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作者：
Qifeng Wang;Sadaki Samitsu;Y. Fujii;C. Yoshikawa;T. Miyazaki;Hidekuni Banno;Izumi Ichinose
通过将稀释的聚合物溶液和不良溶剂快速混合，可以容易地获得聚合物纳米颗粒。通过纳米沉淀法制备的聚(乙烯基苯酚)、聚(偏二氟乙烯)和翠绿亚胺基聚苯胺纳米颗粒当它们的直径减小到几十纳米时变得粘稠，并且这种聚合物纳米颗粒自发地组装成纳米颗粒的刚性分形网络。通过在微滤膜上过滤这些纤维纳米颗粒网络，可以获得具有由纳米颗粒制成的薄独立滤饼层的超滤膜。纳米颗粒膜至少在 2 MPa 的外加压力下仍然坚固，即使在 0.08 MPa 的极低压差下，也能在超过 1835 L m-2h-1 的通量下从水分散体中分离 99% 的 10 nm Au 纳米颗粒。 © 2015 Wiley periodicals, Inc. J. Polym。科学，B 部分：聚合物。物理。 2015, 53, 615–620
Polymer nanoparticles are readily obtainable by rapidly mixing a dilute polymer solution and a poor solvent. The nanoparticles of poly(vinylphenol), poly(vinylidene fluoride), and emeraldine base polyaniline prepared by nanoprecipitation become sticky when their diameters decrease down to a few tens of nanometers, and such polymer nanoparticles spontaneously assemble into rigid fractal networks of the nanoparticles. By filtering these fibrous nanoparticle networks on a microfiltration membrane, ultrafiltration membranes with a thin free‐standing filter cake layer made of nanoparticles are obtainable. The nanoparticle membranes are robust at least up to the applied pressure of 2 MPa and can separate 99% of 10 nm Au nanoparticles from the aqueous dispersion at the flux of more than 1835 L m⁻²h⁻¹even at very low pressure difference of 0.08 MPa. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 615–620