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公开(公告)号：US20130153490A1
公开(公告)日：2013-06-20
申请号：US13328761
申请日：2011-12-16
CPC分类号： B01D69/08 , B01D69/085 , B01D71/34 , B01D2323/42 , B01D2325/40 , B29C47/0014 , B29C47/0021 , B29C47/0028 , B29C47/8895
摘要： A process of making a reinforced hollow fiber membrane comprises flowing a membrane dope through a casting head while drawing one or more yarns or tows of filaments through the casting head. The filaments are spread apart in the casting head, for example by forcing the yarns or tows around a bend or through a narrow gap in the casting head. The filaments are adapted to bond to the membrane dope or the membrane wall. A reinforced hollow fiber membrane comprises a plurality of filaments individually surrounded by, and bonded to, the membrane wall.
摘要翻译： 制造增强的中空纤维膜的方法包括在将一根或多根丝束或丝束通过铸造头拉出的同时使膜片通过铸造头流动。 长丝在铸造头中分散开，例如通过迫使纱线或丝束绕弯曲或通过铸造头中的窄间隙。 长丝适合于粘合到膜涂料或膜壁上。 增强中空纤维膜包括单独被膜壁包围并结合到膜壁上的多根细丝。
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公开(公告)号：US5914039A
公开(公告)日：1999-06-22
申请号：US886652
申请日：1997-07-01
CPC分类号： B01D69/02 , B01D67/0011 , B01D69/04 , B01D69/08 , B01D69/10 , B01D69/141 , B01D71/34 , C08K9/02 , B01D2325/022 , B01D2325/36 , Y10T428/249979
摘要： A filtration membrane for micro- or ultra-filtration is formed from a complex of PVDF and calcined .alpha.-alumina (".alpha.-Al") particles, in which complex the particles are reacted and dispersed. The suspended complex is then mixed with a hydrophilic polymer such as polyvinyl alcohol (40%-90% hydrolyzed) referred to herein as HPVA, which reacts with the complex imparting hydrophilicity to the polymer. The novel membrane provides about 50% higher specific flux than a membrane made with the same polymer but without the .alpha.-Al particles. Unexpectedly, the net flux is improved by treating the membrane with a solution of sodium hypochlorite which fails to remove the HPVA from the novel membrane but does remove it from the prior art membrane which does not contain the .alpha.-Al. The preferred membrane comprises a macroporous support coated on its outer surface with a thin tubular asymmetric semipermeable film of polymer containing less than about 50% by is weight of .alpha.-A1 particles.
摘要翻译： 用于微量或超滤的过滤膜由PVDF和煅烧的α-氧化铝（“α-Al”）颗粒的复合物形成，其中颗粒反应和分散。 然后将悬浮的复合物与亲水性聚合物如本文称为HPVA的聚乙烯醇（40％-90％水解）混合，其与赋予聚合物赋予亲水性的络合物反应。 新型膜比使用相同聚合物但不含α-Al颗粒的膜提供约50％的比流量。 出乎意料的是，通过用次氯酸钠溶液处理膜不能从新膜除去HPVA，但是将其从不含有α-Al的现有技术的膜中除去，从而提高了净通量。 优选的膜包括在其外表面上涂覆有包含小于约50重量％的α-A 1颗粒的聚合物的薄管状不对称半透膜的大孔载体。
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3.发明授权Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 失效制备包含亲水化的PVDF和α-氧化铝的涂料的方法和由其制成的膜
公开(公告)号：US6024872A
公开(公告)日：2000-02-15
申请号：US312149
申请日：1999-05-14
CPC分类号： B01D69/02 , B01D67/0011 , B01D69/04 , B01D69/08 , B01D69/10 , B01D69/141 , B01D71/34 , C08K9/02 , B01D2325/022 , B01D2325/36 , Y10T428/249979
摘要： A filtration membrane for micro- or ultra-filtration is formed from a complex of PVDF and calcined .alpha.-alumina (".alpha.-Al") particles, in which complex the particles are reacted and dispersed. The suspended complex is then mixed with a hydrophilic polymer such as polyvinyl alcohol (40%-90% hydrolyzed) referred to herein as HPVA, which reacts with the complex imparting hydrophilicity to the polymer. The novel membrane provides about 50% higher specific flux than a membrane made with the same polymer but without the .alpha.-Al particles. Unexpectedly, the net flux is improved by treating the membrane with a solution of sodium hypochlorite which fails to remove the HPVA from the novel membrane but does remove it from the prior art membrane which does not contain the .alpha.-Al. The preferred membrane comprises a macroporous support coated on its outer surface with a thin tubular asymmetric semipermeable film of polymer containing less than about 50% by weight of .alpha.-Al particles.
摘要翻译： 用于微量或超滤的过滤膜由PVDF和煅烧的α-氧化铝（“α-Al”）颗粒的复合物形成，其中颗粒反应和分散。 然后将悬浮的复合物与亲水性聚合物如本文称为HPVA的聚乙烯醇（40％-90％水解）混合，其与赋予聚合物赋予亲水性的络合物反应。 新型膜比使用相同聚合物但不含α-Al颗粒的膜提供约50％的比流量。 出乎意料的是，通过用次氯酸钠溶液处理膜不能从新膜除去HPVA，但是将其从不含有α-Al的现有技术的膜中除去，从而提高了净通量。 优选的膜包括在其外表面上涂覆有包含小于约50重量％的α-Al颗粒的聚合物的薄管状不对称半透膜的大孔载体。
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公开(公告)号：US09321014B2
公开(公告)日：2016-04-26
申请号：US13328761
申请日：2011-12-16
IPC分类号： B01D39/00 , B01D39/14 , B29C67/00 , B29C47/12 , B29C47/00 , B29C47/88 , B01D69/08 , B01D71/34
CPC分类号： B01D69/08 , B01D69/085 , B01D71/34 , B01D2323/42 , B01D2325/40 , B29C47/0014 , B29C47/0021 , B29C47/0028 , B29C47/8895
摘要： A process of making a reinforced hollow fiber membrane comprises flowing a membrane dope through a casting head while drawing one or more yarns or tows of filaments through the casting head. The filaments are spread apart in the casting head, for example by forcing the yarns or tows around a bend or through a narrow gap in the casting head. The filaments are adapted to bond to the membrane dope or the membrane wall. A reinforced hollow fiber membrane comprises a plurality of filaments individually surrounded by, and bonded to, the membrane wall.
摘要翻译： 制造增强的中空纤维膜的方法包括在将一根或多根丝束或丝束通过铸造头拉出的同时使膜片通过铸造头流动。 长丝在铸造头中分散开，例如通过迫使纱线或丝束绕弯曲或通过铸造头中的窄间隙。 长丝适合于粘合到膜涂料或膜壁上。 增强的中空纤维膜包括单独被膜壁包围并结合到膜壁上的多根细丝。
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