Ultrathin membranes for separating substances are obtained by exposing shaped articles comprising a water-soluble polymer or a mixture of a water-soluble polymer and water-insoluble polymer to a plasma of a gas selected from helium, argon, nitrogen, hydrogen, oxygen, carbon monoxide, carbon dioxide,
Ultrathin membranes for separating substances are obtained by exposing shaped articles comprising a water-soluble polymer or a mixture of a water-soluble polymer and water-insoluble polymer to a plasma of a gas selected from helium, argon, nitrogen, hydrogen, oxygen, carbon monoxide, carbon dioxide, ammonia, a hydrocarbon having 1 to 10 carbon atoms, an epoxide having 2 to 10 carbon atoms, or an alkylamine, or a mixture of these substances to crosslink the surface layer, and then washing the exposed articles with water to remove the unreacted portions. The membrane exhibits outstanding performance characteristics when used in the processes for separating or concentrating substances, such as reverse osmosis, ultrafiltration, and the like.
대표청구항▼
A method for maufacturing a semipermeable membrane for separating substances, which comprises exposing a shaped article of a water-soluble polymer or of a mixture of a water-soluble polymer and a water-insoluble polymer wherein the ratio of the water-soluble polymer to the water-insoluble polymer is
A method for maufacturing a semipermeable membrane for separating substances, which comprises exposing a shaped article of a water-soluble polymer or of a mixture of a water-soluble polymer and a water-insoluble polymer wherein the ratio of the water-soluble polymer to the water-insoluble polymer is 1 to 0.1-0.3 by weight to a plasma of a gas selected from the group consisting of helium, argon, nitrogen, hydrogen, oxygen, carbon monoxide, carbon dioxide, ammonia, a hydrocarbon having 1 to 10 carbon atoms, an epoxide having 2 to 10 carbon atoms, an alkylamine, or a mixture thereof to crosslink the surface layer of the shaped article, and then removing the uncrosslinked portions by washing with water to form said semipermeable membrane.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허를 인용한 특허 (32)
Ueno, Susumu; Nomura, Hirokazu; Imada, Kiyoshi, Fluorine-containing synthetic resin shaped articles having improved surface properties and a method for the preparation thereof.
Chau C. C. (Midland MI) Im Jang-hi (Midland MI) Raspor Otto C. (Midland MI) Tung Lu H. (Midland MI), Method for preparing an asymmetric semi-permeable membrane.
Wydeven Theodore J. (Sunnyvale CA) Katz Moshe G. (Givataim ILX), Method for the preparation of thin-skinned asymmetric reverse osmosis membranes and products thereof.
Ehrfeld Wolfgang (Karlsruhe DEX) Hagmann Peter (Eggenstein-Leopoldshagen DEX) Mohr Jrgen (Sulzfeld DEX) Mnchmeyer Dietrich (Stutensee DEX), Microporous membrane filter and method of producing same.
Chau Chieh-Chun (Midland MI) Wessling Ritchie A. (Midland MI), Preparation of asymmetric membranes by the solvent extraction of polymer components from polymer blends.
Busch Walter (Wiesbaden DEX) Holst Arno (Wiesbaden DEX) Fischer Wilhelm (Pirmasens DEX), Sheet-like structure of polyurethane, which is capable of absorbing water vapor and transmitting water vapor.
Busch Walter (Wiesbaden DEX) Holst Arno (Wiesbaden DEX) Fischer Wilhelm (Pirmasens DEX), Sheet-like structure of polyvinyl chloride, which is capable of absorbing water vapor and transmitting water vapor.
Legeay,Gilbert; Bertrand,Patrick; Belcourt,Alain; Kessler,Laurence, membrane for encapsulation chamber of cells producing at least a biologically active substance and bioartificial organ comprising same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.