Abstract: Disclosed are an adsorptive permeation hollow fiber membrane formed by uniformly dispersing an adsorbent capable of selectively adsorbing only a specific gas in mixed gas components inside a porous hollow fiber membrane having a sponge structure capable of non-selectively permeating a mixed gas in a powder or crystalline powder form, a method of manufacturing the same, and a gas adsorptive/desorptive separation system utilizing the same.

Abstract: Disclosed are an adsorptive permeation hollow fiber membrane formed by uniformly dispersing an adsorbent capable of selectively adsorbing only a specific gas in mixed gas components inside a porous hollow fiber membrane having a sponge structure capable of non-selectively permeating a mixed gas in a powder or crystalline powder form, a method of manufacturing the same, and a gas adsorptive/desorptive separation system utilizing the same.

Abstract: Disclosed herein is a braid-reinforced hollow fiber membrane, comprising an active layer formed on the surface of a tubular braid, wherein the braid is made of a mixture of metal wire with polymer fiber. The hollow fiber membrane can be used in separation processes at high pressure due to the pressure resistance thereof, can be used in the separation of organic solvents at high temperature due to the dimensional stability thereof, and in addition, can be used in various applications due to the electrical conductivity thereof.

Abstract: Disclosed herein is a hollow fiber membrane for feeding a mixture into the hollow space thereof, in which the mixture to be separated is fed into the hollow space of the hollow fiber membrane and allowed to permeate through a porous membrane comprising an active layer. The hollow fiber membrane is manufactured by forming a tubular active layer having a hollow space and making a polymer fiber braid, a metal wire braid or a braid consisting of a mixture of polymer fiber with metal wire, directly on the outer surface of the tubular layer, such that the active layer can be prevented from being expanded if a high-temperature, high-pressure mixture is fed into the hollow space.

Abstract: This invention relates to a method and apparatus for on-line measurement of permeation characteristics (transmitting chemicals) through dense nonporous membrane. This invention is intended to facilitate various research activities, such as simultaneous analyses of diffusion coefficient, solubility coefficient, permeation rate and permeant composition, and presentation of new analysis about the permeation behavior, kinetics and so on. The object of this invention is to provide the method and apparatus for measurement of permeation characteristics of permeants in liquid, vapor or gas phase through dense nonporous membrane and more practicuraly, to provide permeation apparatus for measurement of permeation characteristics by analyzing permeation rate and permeation concentration of permeants through an on-line type dense porous membrane with time, not only for a steady state but also for an unsteady state in an accurate and reliable manner.

Abstract: This invention relates to a polyion complex separation membrane with a double structure, which is applicable in the separation process of a water-soluble mixture having ionic molecules or particles by means of reverse osmotic pressure for the purposes of recovering expensive ionic organic materials such as anionic emulsifiers from the waste water. More particularly, this invention relates to said membrane having anionic polymers, as substrate, which is immersed into a cationic polymer solution containing a multivalent ion cross-linking agent, by which a cross-linkage within the internal of the separation membrane is achieved, thereby forming an ion complex between ionic polymers of opposite ion at the surface of the separation membrane to yield a stable separation membrane of a double structure.

Abstract: The present invention relates to a process for preparing the controlled-release chitosan microcapsule, more specifically to a process for preparing the sustained-release chitosan microcapsule capable of releasing at an appropriate rate for a long time, which is characterized by: a) Biodegradable chitosan polymer is used for the capsule material; b) The capsule is kept stable during the release time by the rapid and effective crosslinking reaction between the chitosan polymer and the double crosslinking agent on the surface of tiny particles formed by a new emulsion interface reaction method using a double crosslinking agent of sulfuric acid and glutaraldehyde; and c) The microcapsule which is smaller than several &mgr;m s can be easily formed and the capsule is kept stable for a long release time because an insoluble polymer film whose source material is biodegradable is formed after the release.