公开(公告)号：US20190168172A1

公开(公告)日：2019-06-06

申请号：US16323022

申请日：2016-08-08

申请人： THE UNIVERSITY OF HONG KONG

发明人： Jianqiang WANG ,  Xiaonan SHI ,  Zhe YANG ,  Chuyang TANG

IPC分类号： B01D69/12 ,  B01D67/00 ,  B01D69/14 ,  B01D71/42 ,  B01D69/10 ,  B01D69/02 ,  C02F1/44 ,  C02F1/50 ,  B01D63/08

摘要： A hand-carry gravity-driven water filter with high throughput and water disinfection performance is formed. Membranes used for this water filter can be fabricated using electrospun method and non-solvent induced phase inversion method. A novel composite membrane structure (interwoven composite structure) was designed for further enhances water permeability and mechanical strength. The composite membrane can be composed of nanofibers with different diameter from the same polymer or different polymers. Membrane porosity and surface pore size can be controlled. Silver nanoparticles can be in-situ loaded on the surface of the membranes. The developed filter is effective for removal of a wide range of contaminants (e.g., pathogens, suspended solids and heavy metals). The purification process can be carried out under the drive of gravity (with an option for mechanically-enhanced filtration) without electricity.

公开(公告)号：US20240286087A1

公开(公告)日：2024-08-29

申请号：US18428803

申请日：2024-01-31

申请人： The University of Hong Kong

发明人： Li WANG ,  Chuyang TANG

IPC分类号： B01D69/12 ,  B01D61/02 ,  B01D71/56 ,  C02F1/44 ,  C08J7/04

CPC分类号： B01D69/1251 ,  B01D61/027 ,  B01D71/56 ,  C02F1/442 ,  C08J7/0427 ,  C08J2377/06 ,  C08J2477/06

摘要： A thin film composite nanofiltration (TFC-NF) membrane is produced by forming a dispersion of aramid nanofibers (ANFs) in a water miscible polar organic solvent that is formed into a thin film that is contacted with an aqueous solution of a di- and/or poly-amine. This amine absorbed film has a solution of one or more di-, tri, and/or poly acid chlorides in a water immiscible polar organic solvent poured onto the supported film. Upon removal of residual solutions, optionally the film can be activated, and upon drying the TFC-NF membrane is isolated. The TFC-NF membrane produced by this process is superior in permeability and selectivity for use in water purification by nanofiltration.