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    • 10. 发明申请
    • NANOSTRUCTURED POLYMER MEMBRANES FOR SELECTIVE ALCOHOL TRANSPORT
    • 用于选择性酒精运输的纳米结构聚合物膜
    • WO2011112796A3
    • 2012-04-05
    • PCT/US2011027871
    • 2011-03-10
    • UNIV CALIFORNIABALSARA NITASH PJHA ASHISH KCHEN LIANG
    • BALSARA NITASH PJHA ASHISH KCHEN LIANG
    • C08G61/08B01D71/40B01D71/44B01D71/52B01D71/70B01D71/72B01D71/80C08F283/14C08G61/12C08G77/42C08J5/22C08L65/00
    • C08L65/00B01D61/362B01D71/40B01D71/44B01D71/52B01D71/70B01D71/72B01D71/80C08F293/005C08G61/08C08G61/12C08G77/20C08G77/442C08L53/02
    • The present invention relates to copolymer compositions for alcohol-selective membranes and methods of selectively separating an alcohol such as ethanol from an aqueous solution using such membranes. The copolymer compositions may be block copolymers of polystyrene-polybutadiene-polystyrene (hereafter "SBS") having cylindrical morphologies; graft diblock copolymers synthesized by ring-opening metathesis polymerization of two cycloalkene monomers, wherein at least one of the cycloalkene monomers is substituted with one or more polydialkylsiloxane groups; or triblock copolymers comprising a middle block comprising a polymerized cycloalkene monomer and two end groups. The synthesized graft and triblock copolymer compositions may have a spherical, lamellar, cylindrical, double diamond, or gyroid morphologies. The copolymer compositions may contain a structural block that imparts essential mechanical properties to the membrane (e.g., polystyrene) and may also contain an alcohol transporting block (e.g., polydimethylsiloxane or polybutadiene). The copolymer compositions may have a domain spacing and a flux, where the flux increases as the domain spacing increases. The copolymer compositions may also have an alcohol separation factor that increases as the domain spacing increases. The separation method may be carried out using pervaporation or vapor permeation techniques.
    • 本发明涉及醇选择性膜的共聚物组合物和使用这种膜从水溶液中选择性地分离醇如乙醇的方法。 共聚物组合物可以是具有圆柱形状的聚苯乙烯 - 聚丁二烯 - 聚苯乙烯(以下称为“SBS”)的嵌段共聚物; 通过两个环烯烃单体的开环易位聚合合成的接枝二嵌段共聚物,其中至少一种环烯烃单体被一个或多个聚二烷基硅氧烷基团取代; 或包含包含聚合的环烯烃单体和两个端基的中间嵌段的三嵌段共聚物。 合成的接枝和三嵌段共聚物组合物可以具有球形,层状,圆柱形,双金刚石或旋转形态。 共聚物组合物可以含有向膜(例如聚苯乙烯)赋予必要的机械性能并且也可以含有醇输送嵌段(例如聚二甲基硅氧烷或聚丁二烯)的结构嵌段。 共聚物组合物可以具有畴间隔和通量,其中通量随着畴间距的增加而增加。 共聚物组合物还可以具有随着畴间距增加而增加的醇分离因子。 分离方法可以使用全蒸发或蒸气渗透技术进行。