摘要:
The present invention deals with a process for treating a polyimide comprising exposing said polyimide to a compound selected from the group consisting of dendrimers, hyperbranched polymers and mixtures thereof. The polyimide may be in the form of a membrane and the membrane, after treatment according to the process of the invention, may be suitable for use in a membrane-based separation technique, for example gas separation, filtration, microfiltration, ultrafiltration, reverse osmosis or pervaporation. The membrane may for example be suitable for separation of gas and hydrocarbon mixtures including mixtures of H2/N2, H2/CO2, He/N2, CO2/CH4, and C2–C4 hydrocarbon mixtures.
摘要翻译:本发明涉及一种处理聚酰亚胺的方法,包括将所述聚酰亚胺暴露于选自树枝状聚合物,超支化聚合物及其混合物的化合物中。 聚酰亚胺可以是膜的形式,并且在根据本发明的方法处理之后,膜可以适用于基于膜的分离技术,例如气体分离,过滤,微滤,超滤,反渗透 或渗透蒸发。 膜可以例如适合于气体和烃混合物的分离,包括H 2/2 N 2 / H 2 H 2 N 2 CO 2的混合物 > 2,He / N 2,CO 2 / CH 4,和C 2 -C 4烃混合物。
摘要:
The present invention discloses a series of cardo-polybenzoxazole copolymer membranes, methods for preparing the cardo-polybenzoxazole copolymer membrane from thermal rearrangement of cardo-copolyimide membranes, and methods of methods for the separation of a fluid from a mixture of fluids by utilizing the cardo-polybenzoxazole copolymer membrane.
摘要:
There is disclosed a method of making a high performance carbon membranes from polymer membranes. The method comprising the steps of exposing polymer precursor compounds to a polar organic liquid before pyrolysis of the exposed polymer precursor compounds.