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    Surface-modified separation membrane and method for modifying surface of separation membrane
    2.
    发明授权
    Surface-modified separation membrane and method for modifying surface of separation membrane 有权

    公开(公告)号：US10207228B2

    公开(公告)日：2019-02-19

    申请号：US14911415

    申请日：2014-10-01

    申请人： LG ELECTRONICS INC. ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY

    发明人： Changho Lee ,  Hyowon Kim ,  Jeongil Kye ,  Hobum Park

    IPC分类号： B01D65/08 ,  B01D67/00

    摘要： A surface-modified separation membrane of the present invention comprises a separation membrane, and a coating layer formed on the surface of the separation membrane for improving the contamination resistance and chemical resistance of the separation membrane, wherein the coating layer is implemented with a nanoscale thickness of the coating layer in order to inhibit a decrease in permeation flux of the separation membrane before and after coating the coating layer, and comprises: dopamine for providing, to the coating layer, an adsorption force to be bound stably with the separation membrane; and a hydrophilic material which is bound to the dopamine through secondary bonding or cross-linking containing a hydrogen bond in order to inhibit the deterioration of the durability of the coating layer, and provides hydrophilicity to the surface of the separation membrane in order to protect the separation membrane from hydrophobic contaminants. A method for modifying the surface of a separation membrane of the present invention comprises the steps of: injecting a separation membrane to be surface-modified into a reactor; adding a mixture solution, which is formed by adding a hydrophilic material to a Tris-buffer solution having an adjusted pH range at which dopamine reacts and stirring the same, to the reactor; adding dopamine and an initiator, which induces the cross-linking of the hydrophilic material and dopamine, to the reactor at a predetermined temperature range; and forming a coating layer comprising dopamine and the hydrophilic material on the separation membrane through thermal cross-linking at the predetermined temperature range while injecting oxygen into the reactor.

    HOLLOW-FIBRE MEMBRANE HAVING NOVEL STRUCTURE, AND PRODUCTION METHOD THEREFOR
    3.
    发明申请
    HOLLOW-FIBRE MEMBRANE HAVING NOVEL STRUCTURE, AND PRODUCTION METHOD THEREFOR 有权
    具有新结构的中空纤维膜及其生产方法

    公开(公告)号：US20150202576A1

    公开(公告)日：2015-07-23

    申请号：US14418708

    申请日：2013-03-29

    申请人： LG ELECTRONICS INC.

    发明人： Junseok Lee ,  Sumin Lee ,  Hyunhwan Oh ,  Changho Lee ,  Minjoung Kim

    IPC分类号： B01D69/08 ,  B01D69/02 ,  B01D71/34

    CPC分类号： B01D69/08 ,  B01D69/02 ,  B01D69/087 ,  B01D71/34 ,  B01D2323/08 ,  B01D2325/02 ,  B01D2325/026 ,  B01D2325/30 ,  D01D5/247 ,  D01F6/12

    摘要： The present invention relates to a hollow-fibre membrane having a novel structure and to a production method therefor. The hollow-fibre separation membrane of the present invention has an outermost shell surface pore size of between 0.001 and 0.05 μm and a mean pore size of between 0.01 and 0.1 μm while having, in sequence from the outermost shell surface, a dense sponge structure, a finger-like sponge structure and a mixed sponge-bead structure; and, because of this specific triple structure, the invention has outstanding mechanical strength, porosity and water permeability alike while also having a high performance whereby it is possible to eliminate even viruses.

    摘要翻译： 本发明涉及具有新颖结构的中空纤维膜及其制造方法。 本发明的中空纤维分离膜的最外壳表面孔径为0.001〜0.05μm，平均孔径为0.01〜0.1μm，同时从最外层的表面依次具有致密的海绵结构， 指状海绵结构和混合海绵珠结构; 并且由于这种特定的三重结构，本发明具有优异的机械强度，孔隙率和水渗透性，同时也具有高性能，从而可以消除甚至病毒。