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    • 86. 发明授权
    • High plasticization-resistant cross-linked polymeric membranes for separations
    • 用于分离的高增塑抗性交联聚合物膜
    • US08816003B2
    • 2014-08-26
    • US12145153
    • 2008-06-24
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • C08F12/22
    • C08B15/10B01D53/228B01D67/0093B01D71/16B01D2323/30B01D2325/30C08G18/6484C08L71/02C08L81/06Y02P20/152
    • This invention involves a composition, a method of making, and an application of high plasticization-resistant chemically cross-linked polymeric membranes such as cross-linked cellulose acetate (CA) membrane. These cross-linked polymeric membranes with covalently interpolymer-chain-connected rigid networks showed no decrease in CO2/CH4 ideal selectivity under 690 kPa (100 psig) pure CO2 pressure and also no CO2 plasticization up to 3447 kPa (500 psig) pure CO2 pressure. By using the method of chemical cross-linking as described in this invention, the separation characteristics of the polymeric membranes can be decisively improved. These new cross-linked polymeric membranes can be used not only for gas separations such as CO2/CH4 and CO2/N2 separations, O2/N2 separation, olefin/paraffin separations (e.g. propylene/propane separation), iso/normal paraffins separations, but also for liquid separations such as pervaporation and desalination.
    • 本发明涉及一种组合物,制备方法,以及应用高耐增塑作用的化学交联聚合物膜,例如交联乙酸纤维素(CA)膜。 这些具有共价互聚链连接的刚性网络的交联聚合物膜在690kPa(100psig)纯二氧化碳压力下没有显示CO 2 / CH 4理想选择性的降低,并且也没有CO2增塑达3447kPa(500psig)纯二氧化碳压力 。 通过使用如本发明所述的化学交联方法,可以确定地提高聚合物膜的分离特性。 这些新的交联聚合物膜不仅可用于气体分离,如CO2 / CH4和CO2 / N2分离,O2 / N2分离,烯烃/石蜡分离(如丙烯/丙烷分离),异/正链烷烃分离,但 还用于液体分离,例如渗透蒸发和脱盐。
    • 89. 发明授权
    • Flexible template-directed microporous partially pyrolyzed polymeric membranes
    • 灵活的模板定向微孔部分热解聚合物膜
    • US08083833B2
    • 2011-12-27
    • US11679160
    • 2007-02-26
    • Chunqing LiuDavid A. LeschStephen T. Wilson
    • Chunqing LiuDavid A. LeschStephen T. Wilson
    • B01D53/22
    • B01D53/228B01D67/003B01D71/64B01D2323/08B01D2323/24Y02C10/10
    • This invention describes a new concept of flexible template-directed microporous partially pyrolyzed polymeric membranes which have greatly improved performance in separation of gas pairs compared to their precursor polymeric membranes. Organic hosts, such as crown ethers, cyclodextrins (CDs), calixarenes (CXs), and spherands, or polymeric additives, such as poly(ethylene glycol) (PEG) and polyvinylpyrrolidone (PVP) were used as the micropore-forming templates. Micropore-forming template/polymer blend membranes comprising organic micropore-forming templates embedded in a polymer matrix were prepared by dissolving the organic micropore-forming templates in the polymer solution followed by solution-casting and solvent evaporation or solvent exchange. Low-temperature selectively pyrolyzing micropore-forming templates in the micropore-forming template/polymer blend membranes at a nitrogen flow resulted in the formation of flexible microporous partially pyrolyzed polymeric membranes.
    • 本发明描述了柔性模板定向的微孔部分热解的聚合物膜的新概念,其与其前体聚合物膜相比具有大大改进气体对分离的性能。 使用有机主体,例如冠醚,环糊精(CDs),杯芳烃(CXs)和花粉,或聚合物添加剂如聚(乙二醇)(PEG)和聚乙烯吡咯烷酮(PVP))作为微孔形成模板。 通过将有机微孔形成模板溶解在聚合物溶液中,然后进行溶液流延和溶剂蒸发或溶剂交换来制备包含嵌入聚合物基质中的有机微孔形成模板的微孔形成模板/聚合物共混膜。 在微孔形成模板/聚合物共混膜中的氮气流下的低温选择性热解微孔形成模板导致柔性微孔部分热解聚合物膜的形成。
    • 90. 发明授权
    • Cross-linkable and cross-linked mixed matrix membranes and methods of making the same
    • 可交联和交联的混合基质膜及其制备方法
    • US07806962B2
    • 2010-10-05
    • US12193897
    • 2008-08-19
    • Chunqing LiuJeffrey J. ChiouStephen T. Wilson
    • Chunqing LiuJeffrey J. ChiouStephen T. Wilson
    • B01D53/22
    • B01D53/228B01D67/0004B01D67/009B01D69/02B01D69/141B01D71/64B01D2323/30B01D2323/345Y02C10/10Y02C20/20Y10S55/05
    • The present invention is for novel high performance cross-linkable and cross-linked mixed matrix membranes and the use of such membranes for separations such as for CO2/CH4, H2/CH4 and propylene/propane separations. More specifically, the invention involves the preparation of cross-linkable and cross-linked mixed matrix membranes (MMMs). The cross-linkable MMMs were prepared by incorporating microporous molecular sieves or soluble high surface area microporous polymers (PIMs) as dispersed microporous fillers into a continuous cross-linkable polymer matrix. The cross-linked MMMs were prepared by UV-cross-linking the cross-linkable MMMs containing cross-linkable polymer matrix such as BP-55 polyimide. Pure gas permeation test results demonstrated that both types of MMMs exhibited higher performance for CO2/CH4 and H2/CH4 separations than those of the corresponding cross-linkable and cross-linked pure polymer matrices.
    • 本发明是用于新型高性能可交联和交联的混合基质膜,以及这种膜用于分离的用途,例如用于CO 2 / CH 4,H 2 / CH 4和丙烯/丙烷分离。 更具体地,本发明涉及可交联和交联的混合基质膜(MMM)的制备。 通过将微孔分子筛或可溶性高表面积微孔聚合物(PIM)作为分散的微孔填料掺入连续可交联的聚合物基质中来制备可交联的MMM。 交联的MMM通过UV-交联含有可交联聚合物基质如BP-55聚酰亚胺的可交联MMM制备。 纯气体渗透测试结果表明,两种类型的MMM对于CO 2 / CH 4和H 2 / CH 4分离显示出比相应的可交联和交联纯聚合物基质更高的性能。