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    • 95. 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。
    • 97. 发明授权
    • Polymer membranes derived from aromatic polyimide membranes
    • 衍生自芳族聚酰亚胺膜的聚合物膜
    • US08613362B2
    • 2013-12-24
    • US12412653
    • 2009-03-27
    • Chunqing LiuRaisa SerbayevaMan-Wing TangLubo ZhouPeter K. Coughlin
    • Chunqing LiuRaisa SerbayevaMan-Wing TangLubo ZhouPeter K. Coughlin
    • B01D71/64B01D71/28B01D69/00
    • B01D71/64B01D67/0088B01D2323/08B01D2323/30
    • The present invention discloses a new type of high performance polymer membranes derived from aromatic polyimide membranes and methods for making and using these membranes. The polymer membranes described in the present invention were derived from aromatic polyimide membranes by crosslinking followed by thermal treating. The aromatic polyimide membranes were made from aromatic polyimide polymers comprising both pendent hydroxy functional groups ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone. The high performance polymer membranes showed significantly improved permeability for gas separations compared to the aromatic polyimide membranes without any treatment. The high performance polymer membranes also showed significantly improved selectivity for gas separations compared to the thermal-treated but non-UV-crosslinked aromatic polyimide membranes. The high performance polymer membranes of the present invention are suitable for liquid, gas, and vapor separations, as well as for catalysis and fuel cell applications.
    • 本发明公开了一种衍生自芳族聚酰亚胺膜的新型高性能聚合物膜以及制造和使用这些膜的方法。 本发明中描述的聚合物膜通过交联然后进行热处理从芳族聚酰亚胺膜得到。 芳族聚酰亚胺膜由芳族聚酰亚胺聚合物制成,其中包含杂环酰亚胺氮原子的邻接羟基官能团和聚合物主链中的可交联官能团。 与没有任何处理的芳族聚酰亚胺膜相比,高性能聚合物膜显示出显着改善气体分离的渗透性。 与热处理但非UV交联的芳族聚酰亚胺膜相比,高性能聚合物膜还显示出对气体分离的选择性显着提高。 本发明的高性能聚合物膜适用于液体,气体和蒸汽分离,以及催化和燃料电池应用。