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    • 62. 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。
    • 63. 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。
    • 67. 发明授权
    • Mixed matrix membranes incorporating microporous polymers as fillers
    • 混合基质膜结合微孔聚合物作为填料
    • US07410525B1
    • 2008-08-12
    • US11224181
    • 2005-09-12
    • Chunqing LiuStephen T. Wilson
    • Chunqing LiuStephen T. Wilson
    • B01D53/22B01D39/00B01D39/14C02F1/50B32B3/26
    • B01D53/228B01D67/0079B01D69/147B01D69/148B01D71/028B01D2257/504B01D2323/21B01D2323/26B01D2325/02Y02C10/10Y10T428/249977
    • The present invention is for a polymer/polymer mixed matrix membrane and the use of such membranes in gas separation applications. More specifically, the invention involves the preparation of polymer/polymer mixed matrix membranes incorporating soluble polymers of intrinsic microporosity as microporous fillers. These polymeric fillers of intrinsic microporosity exhibit behavior analogous to that of conventional microporous materials including large and accessible surface areas, interconnected micropores of less than 2 nm in size, as well as high chemical and thermal stability, but, in addition, possess properties of conventional polymers including good solubility and easy processability. Gas separation experiments on these mixed matrix membranes show dramatically enhanced gas separation performance for CO2 removal from natural gas. Mixed matrix membranes prepared in accordance with the present invention can also be used in the separation of the following pairs of gases: hydrogen/methane, carbon dioxide/nitrogen, methane/nitrogen and olefin/paraffin such as propylene/propane.
    • 本发明用于聚合物/聚合物混合基质膜以及在气体分离应用中使用这种膜。 更具体地,本发明涉及制备聚合物/聚合物混合基质膜,其中掺入作为微孔填料的本征微孔的可溶性聚合物。 这些具有本征微孔性的聚合物填料表现出类似于常规微孔材料的行为,其包括大的和可接近的表面积,尺寸小于2nm的相互连接的微孔以及高的化学和热稳定性,而且还具有常规的性质 聚合物包括良好的溶解性和易加工性。 这些混合基质膜上的气体分离实验显示从天然气中去除CO 2的气体分离性能显着提高。 根据本发明制备的混合基质膜也可用于分离下列气体:氢气/甲烷,二氧化碳/氮气,甲烷/氮气和烯烃/石蜡如丙烯/丙烷。