Abstract:
PHOTOCOPOLYMERIZATION OF ACRYLONITRILE AND VINYLIDENE CHLORIDE, COMPRISING PROJECTING LIGHT ONTO THESE REACTANTS IN AN ORGANIC SOLVENT IN THE PRESENCE OF HYDROGEN PEROXIDE.
Abstract:
PURPOSE:An improvement in the material quality of a tube plate for supporting hollow fibre bundles in a casing and for separation of treating and treated liquids.
Abstract:
PURPOSE:To obtain a fluid separator with ease of defoaming and satisfactory adhesive strength by treating the inner surface of a semipermeable membrane housing vessel with plasma. CONSTITUTION:A liquid separator is constituted by housing a bundle of hollow fibers 3 in housing vessels 1 equipped with fluid inlets 5 and 6 and a housing vessel 2 provided with outlets 7 and 8. The material of the vessels 1 and 2 is selected from polystyrene, polyethylene, etc. in consideration of pressure, toxicity, etc. The defoaming property and adhesive strength are improved by treating the vessels 1 and 2 with plasma. The plasma treatment, in this case, is carried out by applying low-temp. plasma, wherein the electrons are properly excited like an ionized gas formed by supplying an electric field under low atmospheric pressure, to the material. And the surface is treated without changing the property of the bulk of the material. The high-frequency power is selected from 1- 5W, and the treating time is preferably regulated from several seconds to several minutes.