HIGH FLUX MICROFILTRATION MEMBRANES WITH VIRUS AND METAL ION ADSORPTION CAPABILITY FOR LIQUID PURIFICATION
    8.
    发明申请
    HIGH FLUX MICROFILTRATION MEMBRANES WITH VIRUS AND METAL ION ADSORPTION CAPABILITY FOR LIQUID PURIFICATION 审中-公开
    具有病毒和金属离子吸附能力的高通量微滤膜,用于液体净化

    公开(公告)号:US20130180917A1

    公开(公告)日:2013-07-18

    申请号:US13817224

    申请日:2011-08-22

    IPC分类号: B01D61/18 B01D37/00

    摘要: Microfiltration membranes achieve high retention of bacteria and viruses by pore-size exclusion by the diameters of the fibers in the scaffold layer. The membranes have a high permeation flux as compared with conventional commercial micro filtration membranes under the same applied pressure. Ultra-fine nanofibers (fiber diameters from 3 nanometers to 50 nanometers and lengths from about 100 nanometers to about 5000 nanometers) are infused into, or deposited onto the surface of fibrous filtration media. Negatively charged ultra-fine nanofibers can include polysaccharide nanofibers prepared by a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)INaBrINaCIO oxidation system in aqueous solution. Ultra-fine polysaccharide nanofibers having a large number of carboxylate groups are produced. (0.7-1.0 mmol/g cellulose) The carboxylate groups are negatively charged, and can interact with positively charged polymers/molecules by forming a complex. Such ultra-fine polysaccharide nanofibers have positive charges, that are effective for the removal of bacteria and viruses through adsorption.

    摘要翻译: 微滤膜通过孔尺寸排除通过支架层中纤维的直径实现细菌和病毒的高保留。 在相同的施加压力下,膜与常规商业微过滤膜相比具有高渗透通量。 将超细纳米纤维(纤维直径从3纳米到50纳米,长度从约100纳米到约5000纳米)注入或沉积在纤维过滤介质的表面上。 负电荷的超细纳米纤维可以包括通过2,2,6,6-四甲基哌啶-1-氧基(TEMPO)INaBrinaCIO氧化体系在水溶液中制备的多糖纳米纤维。 制备具有大量羧酸盐基团的超细多糖纳米纤维。 (0.7-1.0mmol / g纤维素)羧酸酯基团带负电荷,并且可以通过形成络合物与带正电荷的聚合物/分子相互作用。 这种超细多糖纳米纤维具有正电荷,对于通过吸附去除细菌和病毒是有效的。