公开(公告)号：US20190176094A1

公开(公告)日：2019-06-13

申请号：US16325168

申请日：2017-06-02

申请人： DALIAN UNIVERSITY OF TECHNOLOGY

发明人： Xie QUAN ,  Gaoliang WEI ,  Shuo CHEN ,  Hongtao YU

IPC分类号： B01D67/00 ,  B01D71/02 ,  C01B32/184 ,  B01D69/12

摘要： The invention, belonging to the field of membrane technology, presents a method for the direct growth of ultrathin porous graphene separation membranes. Etching agent, organic solvent and polymer are coated on metal foil, and then they are calcined at high temperature in absence of oxygen; after removal of metal substrate and reaction products, single-layered or multi-layered porous graphene membranes are obtained. Alternatively, the dispersion or solution of etching agent is coated on metal foil, on which a polymer film is then overlaid. The obtained sample is subsequently calcined at high temperature in absence of oxygen; after removal of metal substrate and reaction products, single-layered or multi-layered porous graphene membranes are obtained. The method involved in this invention is simple and highly efficient, and allows direct growth of ultrathin porous graphene separation membranes, without needing expensive apparatuses, chemicals and graphene raw material. Additionally, the graphene membranes prepared with this method have controlled pore size, ultrahigh water flux and strong resistance to irreversible fouling.

公开(公告)号：US20230191338A1

公开(公告)日：2023-06-22

申请号：US18083155

申请日：2022-12-16

申请人： Dalian University of Technology

发明人： Shuo CHEN ,  Chengyu YUAN ,  Qi ZHANG ,  Gaoliang WEI ,  Xie QUAN

IPC分类号： B01D71/02 ,  B01D69/02 ,  B01D67/00 ,  C01B32/907 ,  C01B32/921

CPC分类号： B01D71/0221 ,  B01D69/02 ,  B01D67/00416 ,  B01D67/006 ,  B01D67/0058 ,  B01D67/0076 ,  C01B32/907 ,  B01D71/021 ,  C01B32/921 ,  B01D2325/36 ,  B01D2325/26 ,  B01D2325/28 ,  B01D2323/08 ,  B01D2323/12 ,  B01D2323/10 ,  B01D2323/21817 ,  B01D2323/21815 ,  B01D2323/28 ,  B01D2323/36 ,  B01D2323/56

摘要： The present disclosure provides a rigid self-supporting MXene separation membrane and a preparation method and use thereof, belonging to the technical field of membranes. In the present disclosure, a MXene material is mixed with an aluminum salt powder to conduct one-step membrane formation by hot-pressing. The pressure forms the powder into a membrane and imparts rigidity, enabling a self-supporting structure; the heating breaks an ionic bond of an inorganic metal salt to reach a molten ionic state, and free metal cations react with active oxygen-containing functional groups on the surface of the MXene to form new chemical bonds (such as an Al—O bond); such a chemical bond has higher energy, achieving a desirable anti-swelling effect to improve the membrane stability. The separation membrane further has excellent conductivity and hydrophilicity.

公开(公告)号：US20170014777A1

公开(公告)日：2017-01-19

申请号：US15120637

申请日：2014-04-28

申请人： DALIAN UNIVERSITY OF TECHNOLOGY

发明人： Xie QUAN ,  Gaoliang WEI ,  Shuo CHEN ,  Hongtao YU

IPC分类号： B01D67/00 ,  B01D69/14 ,  B01D71/66 ,  B01D71/44 ,  B01D71/42 ,  B01D71/32 ,  B01D69/08 ,  B01D71/02

CPC分类号： B01D67/0079 ,  B01D67/0011 ,  B01D67/0067 ,  B01D69/02 ,  B01D69/08 ,  B01D69/085 ,  B01D69/148 ,  B01D71/021 ,  B01D71/32 ,  B01D71/38 ,  B01D71/42 ,  B01D71/44 ,  B01D71/66 ,  B01D2325/26 ,  B82B3/0009

摘要： The invention, belonging to the field of membrane technology, presents a method for the high-throughput preparation of carbon nanotube hollow fiber membranes. This method contains three major steps. Firstly, the pristine carbon nanotubes (CNTs) are added into a mixture of concentrated nitric acid and sulfuric acid, which is then heated at 40˜80° C. for 0.5˜6 hours. Secondly, the surface-functionalized CNTs and polyvinyl butyral (PVB) are dispersed and dissolved, respectively, in organic solvents at a mass ratio of 1:0.2˜1:4˜8 to form homogeneous spinning solution, which is squeezed into water as shell liquid with water as core liquid at a flow rate ratios of 0.5˜5:1 through a spinneret to form CNT/PVB hollow fibers. Finally, the dry fibers are calcinated at 600˜1000 ° C. for 1˜4 hours in absence of oxygen to produce free-standing CNT hollow fiber membranes. The method involved in this invention is simple and highly efficient without needing any templates, expensive apparatuses and chemicals. Additionally, the obtained electrically conductive CNT hollow fiber membranes feature a high porosity, high water flux and strong acid/alkali resistance.

摘要翻译： 属于膜技术领域的本发明提出了一种高通量制备碳纳米管中空纤维膜的方法。 此方法包含三个主要步骤。 首先，将原始碳纳米管（CNT）加入到浓硝酸和硫酸的混合物中，然后在40〜80℃下加热0.5〜6小时。 其次，将表面官能化的CNT和聚乙烯醇缩丁醛（PVB）分别溶解在有机溶剂中，质量比为1:0.2〜1:4〜8，形成均匀的纺丝溶液，将其挤入水中作为壳 液体以水为核心液体，流速比为0.5〜5:1，通过喷丝头形成CNT / PVB中空纤维。 最后，将干纤维在600〜1000℃下煅烧1〜4小时而不存在氧气，制成独立的CNT中空纤维膜。 本发明涉及的方法简单而高效，而不需要任何模板，昂贵的设备和化学品。 另外，得到的导电性CNT中空纤维膜的孔隙率高，水通量高，耐酸碱性强。