The present disclosure herein relates to a terminally-crosslinked methyl morpholinium-functionalized block copolymer, and an anion exchange membrane using the same, and more particularly, to a terminally-crosslinked block copolymer which has a novel structure, and in which, in a poly(arylene ether sulfone) multiblock copolymer (MM-PES) having methyl morpholinium as a conducting group, an azide compound may be used as a crosslinking agent so that crosslinking only occurs at ends of the polymer chains (xMM-PES), thereby minimizing conductivity loss, significantly increasing mechanical and chemical stability, attaining additional conductivity resulting from the three-dimensional structure of morpholinium, and reducing water uptake while enhancing water retention capacity, uses thereof as an alkaline fuel cell anion exchange membrane (AEM), and a method for conveniently preparing the same through simple heat-treatment.

Provided is a novel continuous single-step method of manufacturing a multilayer sorbent polymeric membrane having superior productivity, properties and performance. At least one layer of the polymeric membrane comprises sorbent materials and a plurality of interconnecting pores. The method includes: (a) coextruding layer-forming compositions to form a multilayer coextrudate; (b) casting the coextrudate into a film; (c) extracting the film with an extractant; and (d) removing the extractant from the extracted film to form the multilayer sorbent polymeric membrane. The sorbent membrane of this disclosure can find a wide range of applications for use in filtration, separation and purification of gases and fluids, CO.sub.2 and volatile capture, structural support, vehicle emission control, energy harvesting and storage, electrolyte batteries. device, protection, permeation, packaging, printing, and etc.

The present invention provides a separation membrane suitable for separating water from a liquid mixture containing an alcohol and water, the separation membrane being capable of reducing a decrease in separation performance regardless of long-term use. A separation membrane 10 of the present invention includes a polyimide having a structural unit X represented by the following formula (1) and a structural unit Y represented by following formula (2). ##STR00001## A.sup.1 is a linking group including no arylene group in a main chain and having a solubility parameter, in accordance with a Fedors method, of more than 5.0 (cal/cm.sup.3).sup.1/2. A.sup.2 is a tetravalent organic group including an arylene group.

A hollow fiber membrane for separating blood plasma from blood, comprising a blood contact layer and a support layer each comprising a hydrophobic polymer, a hydrophilic polymer and vitamin E, and a method for producing said hollow fiber membrane to provide a hollow fiber membrane is described. The hollow fiber membrane is characterized by a reduced hemolysis activity so that the hollow fiber membrane can be advantageously used in plasmapheresis methods.

Systems and methods for separating a gas mixture of organic gaseous compounds and inorganic gaseous compounds are disclosed. The systems include a membrane unit with a membrane element that is at least partially coated with an organic liquid. The methods include using a membrane unit with the membrane element at least partially coated with an organic liquid to separate a gas mixture of organic gaseous compounds and inorganic gaseous compounds.