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    • 8. 发明授权
    • Integral multi-layered ion-exchange composite membranes
    • 整体多层离子交换复合膜
    • US6130175A
    • 2000-10-10
    • US315997
    • 1999-05-21
    • Greg RuschJeffrey A. Kolde
    • Greg RuschJeffrey A. Kolde
    • B01D69/10B01D69/12B01D71/32B32B27/12C08J5/22B32B5/32
    • C08J5/2275B01D69/10B01D69/12B01D71/32B32B27/12C08J2327/18
    • The present invention provides a distinct advancement over presently known ion-exchange composite membranes, and the techniques for making such membranes. In one embodiment of the present invention, this is accomplished by a thin integral composite membrane comprised of a microporous polymer film, such as expanded polytetrafluoroethylene having a porous microstructure defined by polymeric fibrils, which provides a reinforcing support that supports an ion-exchange polymer resin or material on one side of the porous polymeric film and supports another different ion-exchange polymer resin on the other side. Thus, the invention uses two different ion-exchange resins on each side of a porous polymeric support film. By employing ionic exchange resins which differ in structure, functional groups or equivalent weight, or a combination of such, a wide variety of composites can be made and tailored to specific end uses.
    • 本发明提供了对目前已知的离子交换复合膜的显着进步以及制造这种膜的技术。 在本发明的一个实施方案中,这是通过由微孔聚合物膜构成的薄整体复合膜来实现的,所述微孔聚合物膜例如具有由聚合物原纤维限定的多孔微结构的膨胀聚四氟乙烯,其提供支撑离子交换聚合物树脂 或在多孔聚合物膜的一侧上的材料,并且在另一侧上支撑另一种不同的离子交换聚合物树脂。 因此,本发明在多孔聚合物支撑膜的每一侧上使用两种不同的离子交换树脂。 通过使用不同结构,官能团或当量重量的离子交换树脂,或其组合,可以制造和定制各种复合材料以适应特定的最终用途。