公开(公告)号：US11969697B2

公开(公告)日：2024-04-30

申请号：US17970595

申请日：2022-10-21

Applicant: NANJING TECH UNIVERSITY

Inventor： Gongping Liu ,  Yang Pan ,  Wanqin Jin ,  Haipeng Zhu

IPC: B01D71/82 ,  B01D61/36 ,  B01D67/00 ,  B01D69/10 ,  B01D71/70 ,  C02F1/44 ,  C02F101/32 ,  C02F101/34

CPC classification number: B01D71/82 ,  B01D61/362 ,  B01D67/0006 ,  B01D67/0011 ,  B01D67/0013 ,  B01D69/107 ,  B01D71/701 ,  C02F1/448 ,  C02F2101/32 ,  C02F2101/34

Abstract: The present disclosure relates to a phenyl-modified polydimethylsiloxane (PDMS) separation membrane, a fabrication method thereof, and a use thereof in the separation of an aromatic compound, and belongs to the technical field of separation membrane materials. A phenyl-modified PDMS separation membrane comprising a substrate layer and a selective layer is provided.

公开(公告)号：US11944942B1

公开(公告)日：2024-04-02

申请号：US18337452

申请日：2023-06-20

Applicant: NANJING TECH UNIVERSITY

Inventor： Gongping Liu ,  Jiangying Liu ,  Wanqin Jin ,  Yang Pan

IPC: B01D53/22 ,  B01D67/00 ,  B01D69/12 ,  B01D71/52 ,  B01D71/56 ,  B01D71/70 ,  B01D71/80 ,  B01J20/26 ,  B01J20/28 ,  B01J20/30 ,  C08G77/46

CPC classification number: B01D71/80 ,  B01D53/228 ,  B01D67/0006 ,  B01D67/0011 ,  B01D67/0013 ,  B01D67/009 ,  B01D69/1214 ,  B01D71/5211 ,  B01D71/56 ,  B01D71/701 ,  B01J20/267 ,  B01J20/28035 ,  B01J20/3085 ,  C08G77/46 ,  B01D2323/219 ,  B01D2323/30

Abstract: The present disclosure relates to a polyether block polyamide/polydimethylsiloxane (PDMS) composite membrane for gas separation, and a preparation method and use thereof, and belongs to the technical field of membrane separation. In the present disclosure, an amphoteric copolymer PDMS-polyethylene oxide (PEO) (PDMS-b-PEO) is introduced into an intermediate layer to adjust the interfacial binding performance, thereby promoting preparation of an ultra-thin polyether block polyamide composite membrane. Studies have shown that the surface enrichment of PEO segments not only inhibits a dense SiOx layer formed due to a plasma treatment of a PDMS intermediate layer, but also provides additional hydrophilic sites and interfacial compatibility for the subsequent selective layer. The use of PDMS-b-PEO in an intermediate layer allows the successful preparation of a selective layer with a thickness of about 50 nm.

公开(公告)号：US11951446B2

公开(公告)日：2024-04-09

申请号：US18333528

申请日：2023-06-12

Applicant: NANJING TECH UNIVERSITY

Inventor： Gongping Liu ,  Yang Pan ,  Wanqin Jin

IPC: B01D53/22 ,  B01D67/00 ,  B01D69/02 ,  B01D69/10 ,  B01D69/12 ,  B01D71/70

CPC classification number: B01D71/701 ,  B01D53/228 ,  B01D67/00113 ,  B01D67/0013 ,  B01D67/0018 ,  B01D69/02 ,  B01D69/105 ,  B01D69/107 ,  B01D69/12 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/504 ,  B01D2323/12 ,  B01D2323/345 ,  B01D2325/04

Abstract: The present disclosure provides an acryloyloxy-terminated polydimethylsiloxane (AC-PDMS)-based thin-film composite (TFC) membrane, and a preparation method and use thereof. In the preparation method, a simple ultraviolet (UV)-induced monomer polymerization strategy based on high UV reactivity among acryloyloxy groups is adopted to prepare the AC-PDMS-based TFC membrane. The high UV reactivity among AC-PDMS monomers can induce the rapid curing of a casting solution to enable the formation of an ultra-thin selective layer and the inhibition of pore penetration for a substrate. By optimizing a UV wavelength, an irradiation time, and a polymer concentration, the prepared AC-PDMS-based TFC membrane has a CO2 penetration rate of 9,635 GPU and a CO2/N2 selectivity of 11.5. The UV-induced monomer polymerization strategy based on material properties provides a novel efficient strategy for preparing an ultra-thin PDMS-based membrane, which can be used for molecular separation.