Patent application number | Description | Published |
20090282982 | HOLLOW FIBER, DOPE COMPOSITION FOR FORMING HOLLOW FIBER, AND METHOD OF PREPARING HOLLOW FIBER USING THE SAME - Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyamic acid, and the polyamic acid includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride. | 11-19-2009 |
20090297850 | HOLLOW FIBER, DOPE COMPOSITION FOR FORMING HOLLOW FIBER, AND METHOD OF MAKING HOLLOW FIBER USING THE SAME - Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyimide, and the polyimide includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride. | 12-03-2009 |
20100099804 | POLYMER COMPOUNDS AND A PREPARATION METHOD THEREOF - Disclosed herein are polymer compounds, a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 04-22-2010 |
20110009506 | PREPARATION METHOD OF POLYBENZOXAZOLES BY THERMAL REARRANGEMENT, POLYBENZOXAZOLES PREPARED THEREBY, AND GAS SEPARATION MEMBRANE COMPRISING THE SAME - Disclosed herein are a method for preparing a benzoxazole-based polymer by thermal rearrangement, the benzoxazole-based polymer prepared by the method and a gas separation membrane comprising the polymer. More specifically, provided are a method for preparing a benzoxazole-based polymer by subjecting poly(hydroxyamide) as an intermediate to thermal treatment involving dehydration, the benzoxazole-based polymer obtained thereby and gas separation membrane comprising the polymer. The benzoxazole-based polymer of the present invention can be simply prepared by thermally rearrangement via thermal treatment at low temperatures, and thus exhibits superior mechanical and morphological properties and has well-connected microcavities. Due to showing excellent permeability and selectivity for various gases, the benzoxazole-based polymer is suited for application to gas separation membranes, in particular, gas separation membranes for small gases. | 01-13-2011 |
20110065823 | POLYIMIDE-CO-POLYBENZOXAZOLE COPOLYMER, PREPARATION METHOD THEREOF, AND GAS SEPARATION MEMBRANE COMPRISING THE SAME - Disclosed herein are a polyimide-polybenzoxazole copolymer, a method for preparing thereof and a gas separation membrane comprising the same. More specifically, provided are a polyimide-polybenzoxazole copolymer simply prepared through thermal-rearrangement performed by thermally treating a polyimide-poly (hydroxyimide) copolymer as a precursor, a method for preparing the same, and a gas separation membrane comprising the same. The copolymer shows superior gas permeability and gas selectivity, thus being suitable for use in gas separation membranes in various forms such as films, fibers or hollow fibers. The gas separation membrane thus prepared can advantageously endure even harsh conditions such as long operation time acidic conditions and high humidity due to the rigid polymer backbone present in the copolymer. | 03-17-2011 |
20110230605 | Polymer compounds and a preparation method thereof - Disclosed herein are polymer compounds and a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 09-22-2011 |
20110269857 | POLYMER AND METHOD OF PREPARING THE SAME - Disclosed is a polymer derived from polyamic acid or a polyimide. The polymer derived from polyamic acid or a polyimide includes picopores, and the polyamic acid and the polyimide include a repeating unit obtained from an aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and a dianhydride. | 11-03-2011 |
20110306687 | Polymer compounds and a preparation method thereof - Disclosed herein are polymer compounds and a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state. | 12-15-2011 |
20120042777 | GAS SEPARATION USING MEMBRANES COMPRISING POLYBENZOXAZOLES PREPARED BY THERMAL REARRANGEMENT - A method of separating components of a gas mixture, the method comprising: passing the gas mixture through a benzoxazole-based polymer membrane at a temperature of from about 30° C. to about 400° C., wherein the benzoxazole-based polymer membrane is represented by the formula: | 02-23-2012 |
20120255899 | SEPARATION MEMBRANE INCLUDING GRAPHENE - According to example embodiments, a separation membrane includes a graphene on at least one surface of a polymer support. The graphene may include a plurality of grains defined by grain boundaries. | 10-11-2012 |
20130059155 | GAS BARRIER THIN FILM, ELECTRONIC DEVICE INCLUDING THE SAME, AND METHOD OF PREPARING GAS BARRIER THIN FILM - A gas barrier thin film may include a substrate, an inorganic oxide layer, and a graphene layer between the substrate and the inorganic oxide layer. An encapsulation thin film and electronic device may include the gas barrier thin film. A method of preparing a gas barrier thin film may include forming a graphene layer by transferring graphene on a surface of a substrate, and forming an inorganic oxide layer by depositing an inorganic oxide on the graphene layer. | 03-07-2013 |
20130233791 | SEPARATION MEMBRANE FOR WATER TREATMENT AND MANUFACTURING METHOD THEREOF - The present invention relates to a separation membrane for water treatment having high water flux and membrane contamination preventing characteristics, and a manufacturing method thereof. The separation membrane for water treatment according to the present invention includes a nanofiber wherein the separation membrane has a surface electric charge. According to the present invention, a separation membrane for water treatment having high water flux and membrane contamination preventing characteristics, and a manufacturing method thereof may be implemented. | 09-12-2013 |
20130305927 | GAS SEPARATION MEMBRANE AND METHOD OF PREPARING THE SAME - A gas separation membrane including a porous layered support; and a gas separating active layer which is disposed on the porous layered support and includes a functionalized graphene. | 11-21-2013 |
20130309571 | NEGATIVE ELECTRODE FOR LITHIUM BATTERY, LITHIUM BATTERY INCLUDING THE SAME, AND METHODS OF MANUFACTURE THEREOF - A negative electrode including: a metal layer including lithium; and a platy carbonaceous material layer including a carbonaceous material having a plate structure and disposed on the metal layer. | 11-21-2013 |
20130313182 | SEPARATION MEMBRANE AND WATER TREATMENT DEVICE INCLUDING THE SAME - A forward osmosis water treatment device may use a separation membrane including a polymer layer introduced with a functional group having an affinity for an osmosis draw solute present in an osmosis draw solution. | 11-28-2013 |
20130327701 | SEPARATION MEMBRANE AND WATER TREATMENT DEVICE INCLUDING A SEPARATION MEMBRANE - A separation membrane including a polymer having a structural unit represented by the following Chemical Formula 1, and a water treatment device including a separation membrane, are useful for desalination. | 12-12-2013 |
20140069277 | GAS SEPARATION MEMBRANE AND METHOD OF PREPARING THE SAME - A gas separation membrane including a porous support; and a gas separating active layer which is disposed on the porous support and includes a functionalized graphene. | 03-13-2014 |
Patent application number | Description | Published |
20090286078 | POLYIMIDES DOPE COMPOSITION, PREPARATION METHOD OF HOLLOW FIBER USING THE SAME AND HOLLOW FIBER PREPARED THEREFROM - Disclosed herein are a polyimide dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyimide dope solution composition comprising polyhydroxyimide, polythiolimide or polyaminoimide, spinning the composition to prepare a hollow fiber, and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. | 11-19-2009 |
20090286904 | POLYAMIC ACIDS DOPE COMPOSITION, PREPARATION METHOD OF HOLLOW FIBER USING THE SAME AND HOLLOW FIBER PREPARED THEREFROM - Disclosed herein are a polyamic acid dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyamic acid dope solution composition comprising polyhydroxyamic acid, polythiolamic acid or polyaminoamic acid, spinning the composition to prepare a hollow fiber, and imidizing and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. | 11-19-2009 |
20100292356 | PREPARATION METHOD OF POLYBENZIMIDAZOLE - Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups and acid dianhydride, obtaining polypyrrolone from the polyaminoimide, subjecting the polypyrrolone to alkaline treatment, and subjecting the alkaline-treated polypyrrolone to heat treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores. | 11-18-2010 |