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1. 发明公开

US20240139687A1 SCALING-RESISTANT AND YELLOWING-RESISTANT REVERSE OSMOSIS COMPOSITE MEMBRANE AND PREPARATION METHOD THEREOF 审中-公开
公开(公告)号：US20240139687A1
公开(公告)日：2024-05-02
申请号：US17771022
申请日：2021-12-28
申请人： Jiangsu Longmem Environmental Technology Co., Ltd.
发明人： Juan Shen , Yuchen Zhao , Wei wang , Peng Zhang , Xiaodong Nan
IPC分类号： B01D69/02 , B01D67/00 , B01D69/12 , B01D71/56
CPC分类号： B01D69/02 , B01D67/0006 , B01D69/1214 , B01D69/125 , B01D71/56 , B01D2323/081 , B01D2323/12 , B01D2323/21839 , B01D2323/219 , B01D2323/38 , B01D2325/28 , B01D2325/36
摘要： The present disclosure relates to a scaling-resistant and yellowing-resistant composite reverse osmosis membrane and a preparation method thereof. By modifying the stability and yellowing of a coating of the reverse osmosis membrane, and grafting 2-(methacryloyloxy)ethyl)dimethyl-3-sulphoproyl) ammonium hydroxide (MEDSAH) and ethylene glycol methacrylate (EGMA) as amphoteric monomers and N-(isobutoxymethyl)acrylamide (IBMA) as yellowing-resistant particles on a surface of the reverse osmosis membrane using active polymerization, the present disclosure forms a three-network high-performance PMEDSAH/PEGMA/PIBMA composite coating. By active regulation of a polyamide (PA) layer through the three systems, the reverse osmosis membrane has high compatibility due to PMEDSAH, and stability, high hydrophilicity and anti-protein fouling property due to PEGMA, as well as yellowing-resistant property by coating PIBMA on the surface. The test results show that the reverse osmosis membrane prepared by the present disclosure has excellent stability and yellowing-resistant property. And the flux and salt rejection are also higher than those of the existing reverse osmosis membranes.

2. 发明申请

US20220387937A1 SPACER TUBE REVERSE OSMOSIS MEMBRANE AND PREPARATION METHOD THEREOF 有权
公开(公告)号：US20220387937A1
公开(公告)日：2022-12-08
申请号：US17771822
申请日：2021-12-28
申请人： Jiangsu Longmem Environmental Technology Co., Ltd.
发明人： Juan Shen , Wei Wang , Yuchen Zhao , Xiaodong Nan
IPC分类号： B01D67/00 , B01D61/02 , B01D71/02 , B01D71/68 , B01D61/14 , B01D69/14
摘要： The present disclosure discloses a spacer tube reverse osmosis (STRO) membrane and a preparation method thereof, which relates to the technical field of reverse osmosis membranes. The preparation method of the STRO membrane specifically comprises the following steps: S101: preparation of a zirconia sol; S102: preparation of a casting solution; S103: preparation of a polysulfone ultrafiltration membrane; S104: immersion; and S105: coating. In the preparation method of the present disclosure, an ionic liquid and high-pressure-resistant particles are introduced into an ultrafiltration layer, the ionic liquid is cross-linked with the ultrafiltration layer in the process of interfacial polymerization, and a layer of the ionic liquid is coated on a surface, so that a three-layer high-performance three-dimensional crosslinking system is formed via the ionic liquid. The ionic liquid is prevented from falling off and dispersing in an oil phase solution, and the pressure resistance and hydrophilic performance of the STRO membrane is greatly improved. The STRO membrane is more suitable for using in high-pressure and high-concentration environments. By combining the ionic liquid with the zirconia sol, the STRO membrane of the present disclosure has higher tensile strength and pressure resistance compared with the reverse osmosis membrane prepared by other modified additives. In addition, the flux and desalination rate of the STRO membrane are also improved compared with the conventional reverse osmosis membranes.

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