Plasma-annealed porous polymers
AssigneeNeoMecs Incorporated
InventorHiroshi Nomura
Life of this patent
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Abstract
Porous polymeric materials are hardened by a process of plasma-annealing, involving treatment of at least one surface with a gas plasma formed by glow discharge through a gas containing a saturated alkane or an acetylene. Plasma-annealed porous polymers with reduced adsorption toward proteins were obtained by exposure to a glow discharge through a gas mixture containing an alkane such as methane in combination with oxygen, air, or a hydrophilic unsaturated organic monomer. For example, porous polysulfone sheet and hollow fiber were plasma-annealed by treatment with a gas plasma containing methane and air or acrylic acid with simultaneous deposition of a hydrophilic polymerizate thereon.
Claims18
A method of treating a porous article comprising a process of plasma-annealing at least one exposed surface of the porous article by exposure to a glow discharge gas plasma formed in a gas consisting of a saturated hydrocarbon or an acetylene, wherein the exposed surface is simultaneously hardened by interaction with the gas plasma and altered by a deposit of a plasma polymerizate.
A method of treating a porous article comprising a process of plasma-annealing at least one exposed surface of the porous article by exposure to a glow discharge gas plasma formed in a gas mixture consisting of a saturated hydrocarbon or an acetylene in a blend with oxygen, air or a hydrophilic unsaturated organic monomer, wherein the exposed surface is simultaneously coated with a deposit of a plasma polymerizate and hardened by interaction with the gas plasma.
A porous article comprising a porous polymeric material having at least one surface plasma-annealed by exposure to a glow discharge gas plasma, wherein said surface is treated with a gas plasma formed in a gas mixture consisting of a saturated hydrocarbon or an acetylene in a blend with oxygen or air, wherein said surface is simultaneously coated with a deposit of a plasma polymerizate and hardened by interaction with the gas plasma.
A porous article comprising a porous polymeric material having at least one surface plasma-annealed by exposure of said surface to a gas plasma formed by glow discharge through a gas comprising a saturated hydrocarbon or an acetylene, wherein the exposed surface is simultaneously hardened by interaction with the gas plasma and altered by a deposit of a plasma polymerizate.
A porous article comprising a porous polymeric material having at least one surface plasma-annealed by exposure to a glow discharge gas plasma, wherein said surface is treated with a gas plasma formed in a gas mixture consisting of a saturated hydrocarbon or an acetylene in a blend with an unsaturated hydrophilic monomer, wherein said surface is simultaneously coated with a deposit of a plasma polymerizate and hardened by interaction with the gas plasma.
An article comprising a porous polymeric membrane having at least one surface plasma-annealed by exposure of said surface to a gas plasma formed by glow discharge through a gas comprising a saturated hydrocarbon or an acetylene, wherein the exposed surface is simultaneously hardened by interaction with the gas plasma and altered by a deposit of a plasma polymerizate.
Dependencies are inferred from the claim text.