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    Preparation method of homogeneous-reinforced PVDF hollow fiber membrane
    11.
    发明申请
    Preparation method of homogeneous-reinforced PVDF hollow fiber membrane 审中-公开
    均质增强PVDF中空纤维膜的制备方法

    公开(公告)号：US20150096934A1

    公开(公告)日：2015-04-09

    申请号：US14381213

    申请日：2013-01-24

    Applicant: TIANJIN POLYTECHNIC UNIVERSITY

    Inventor： Changfa Xiao ,  Xuliang Zhang ,  Xiaoyu Hu ,  Shulin An ,  Qinglin Huang ,  Guolan Huan

    IPC: B01D71/34 ,  B01D63/02 ,  B01D67/00 ,  B01D69/08 ,  B01D69/12

    CPC classification number: B01D71/34 ,  B01D63/02 ,  B01D63/021 ,  B01D67/0013 ,  B01D67/0016 ,  B01D67/002 ,  B01D69/02 ,  B01D69/08 ,  B01D69/088 ,  B01D69/10 ,  B01D69/12 ,  B01D2323/00 ,  B01D2325/40

    Abstract: A preparation method of a homogeneous-reinforced PVDF hollow fiber membrane includes steps of: a) preparing a reinforced matrix membrane, wherein a PVDF hollow fiber membrane is utilized as the reinforced matrix membrane; b) preparing a PVDF casting solution, wherein mass fractions of the PVDF casting solution are: PVDF 6˜20 wt %; hydrophilic polymers or hydrophilic inorganic particles 0.6˜2 wt %; pore-forming agent 6˜10 wt %; and solvent 68˜87.4 wt %; mixing the above solutes in a water bath with a temperature of 70˜90° C., dissolving for 3˜4 h with stirring, then deaerating under vacuum for obtaining the uniform PVDF casting solution; and c) preparing the homogeneous-reinforced membrane; wherein the PVDF casting solution is uniformly coated on an outer surface of the reinforced matrix membrane through a spinning spinneret, then the reinforced matrix membrane is towed by a filament guide roller in such a manner that the hollow fiber forms a membrane, then the membrane passes through an air gap with a length of 5˜20 cm and is immersed in ultrafiltered water for coagulation, in such a manner that the homogeneous-reinforced membrane is obtained; wherein a traction speed is 5˜25 cm/(r·min).

    Abstract translation: 均质增强PVDF中空纤维膜的制备方法包括以下步骤：a）制备增强基质膜，其中使用PVDF中空纤维膜作为增强基质膜; b）制备PVDF浇注溶液，其中PVDF浇铸溶液的质量分数为：PVDF 6〜20wt％; 亲水性聚合物或亲水性无机颗粒0.6〜2重量％ 成孔剂6〜10重量％ 和溶剂68〜87.4wt％; 将上述溶质混合在温度为70〜90℃的水浴中，搅拌溶解3〜4h，然后真空脱气，得到均匀的PVDF浇铸溶液; 和c）制备均质增强膜; 其中通过纺丝喷丝头将PVDF铸塑溶液均匀地涂覆在增强基体膜的外表面上，然后用丝导引辊牵引加强基体膜，使得中空纤维形成膜，然后膜通过 通过长度为5〜20cm的气隙，浸渍在超滤水中进行凝固，得到均质增强膜; 牵引速度为5〜25cm /（r·min）。

    Method for preparing homogeneous braid-reinforced PPTA hollow fiber membrane
    15.
    发明申请
    Method for preparing homogeneous braid-reinforced PPTA hollow fiber membrane 审中-公开
    均匀编织增强PPTA中空纤维膜的制备方法

    公开(公告)号：US20160001233A1

    公开(公告)日：2016-01-07

    申请号：US14857874

    申请日：2015-09-18

    Applicant: TIANJIN POLYTECHNIC UNIVERSITY

    Inventor： Changfa Xiao ,  Chun Wang ,  Mingxing Chen ,  Qinglin Huang ,  Hailiang Liu

    IPC: B01D69/08 ,  B01D71/56

    CPC classification number: B01D71/56 ,  B01D63/027 ,  B01D67/0093 ,  B01D69/08 ,  B01D69/12 ,  B01D69/148 ,  B01D2325/40

    Abstract: A method for preparing a homogeneous braid-reinforced (HMR) PPTA hollow fiber membrane combines PPTA hollow tubular braids with PPTA surface separation layer. The method includes following steps of: (1) preparing the PPTA hollow tubular braids, wherein the PPTA hollow tubular braids which are made from PPTA filament yarns are woven by a two-dimensional braided method, the outer diameter of the PPTA tubular braids is 1-2 mm; (2) preparing the PPTA casting solution as the surface separation layer, wherein the 1-3 wt % PPTA resin, 0-2 wt % inorganic particles and 10-20 wt % pore-forming agents are mixed into 75-89% inorganic acid solvent, stirred for 1-3 hours at 70° C.-90° C. to form homogeneous and transparent casting solution; and (3) preparing reinforced PPTA hollow fiber membrane, wherein the casting solution as the surface separation layer is evenly coated on the surfaces of the PPTA hollow tubular braids through spinneret, and they are immersed in a coagulation bath for solidified formation.

    Abstract translation: 制备均匀编织增强（HMR）PPTA中空纤维膜的方法将PPTA中空管状编织物与PPTA表面分离层结合。 该方法包括以下步骤：（1）制备PPTA中空管状编织物，其中由PPTA长丝纱制成的PPTA中空管状编织物通过二维编织方法编织，PPTA管状编织物的外径为1 -2毫米; （2）制备作为表面分离层的PPTA浇铸溶液，其中将1-3重量％PPTA树脂，0-2重量％无机颗粒和10-20重量％成孔剂混合到75-89％无机酸 溶剂，在70℃-90℃下搅拌1-3小时以形成均匀且透明的浇铸溶液; 和（3）制备增强PPTA中空纤维膜，其中作为表面分离层的浇铸溶液通过喷丝头均匀地涂覆在PPTA中空管状编织物的表面上，并将它们浸入凝固浴中以固化形成。

    Preparation method of perfluorinated polymer hollow fiber membrane
    16.
    发明授权
    Preparation method of perfluorinated polymer hollow fiber membrane 有权
    全氟聚合物中空纤维膜的制备方法

    公开(公告)号：US09211503B2

    公开(公告)日：2015-12-15

    申请号：US14358597

    申请日：2013-01-24

    Applicant: TIANJIN POLYTECHNIC UNIVERSITY

    Inventor： Changfa Xiao ,  Zhongqing Miao ,  Qinglin Huang ,  Shulin An

    IPC: B01D67/00 ,  B01D71/32 ,  B01D69/08 ,  B01D63/02 ,  B01D71/06 ,  B01D71/82 ,  C02F1/44

    CPC classification number: B01D67/003 ,  B01D63/02 ,  B01D67/0093 ,  B01D69/087 ,  B01D71/32 ,  B01D2323/18 ,  B01D2325/14 ,  C02F1/44

    Abstract: A preparation method of a perfluorinated polymer hollow fiber membrane comprises: evenly mixing a first mixture that is mixed by a perfluorinated polymer, PS, a polymer additive, and a composite pore-forming agent; evenly mixing a second mixture that is mixed by the first mixture and an organic liquid; under 300° C.-350° C., processing the second mixture with a melt to spin by a twin-screw extruder; extruding a hollow fiber by a hollow fiber spinneret; dipping the hollow fiber membrane into deionized water for 48 hours; putting the hollow fiber membrane aired into a concentrated sulfuric acid to process with a sulfonation; washing the hollow fiber membrane by deionized water; and drying the hollow fiber membrane; in such a manner that the hydrophilic perfluorinated polymer hollow fiber membrane is obtained.

    Abstract translation: 全氟化聚合物中空纤维膜的制备方法包括：将由全氟化聚合物PS，聚合物添加剂和复合成孔剂混合的第一混合物均匀混合; 均匀混合由第一混合物和有机液体混合的第二混合物; 在300℃-350℃下，用熔融物处理第二混合物通过双螺杆挤出机旋转; 通过中空纤维喷丝头挤出中空纤维; 将中空纤维膜浸入去离子水中48小时; 将中空纤维膜放入浓硫酸中进行磺化处理; 用去离子水清洗中空纤维膜; 并干燥中空纤维膜; 以这样的方式获得亲水性全氟化聚合物中空纤维膜。

    Preparation method of perfluorinated polymer hollow fiber membrane
    17.
    发明申请
    Preparation method of perfluorinated polymer hollow fiber membrane 审中-公开
    全氟聚合物中空纤维膜的制备方法

    公开(公告)号：US20140311968A1

    公开(公告)日：2014-10-23

    申请号：US14358597

    申请日：2013-01-24

    Applicant: TIANJIN POLYTECHNIC UNIVERSITY

    Inventor： Changfa Xiao ,  Zhongqing Miao ,  Qinglin Huang ,  Shulin An

    IPC: B01D67/00 ,  B01D63/02 ,  B01D71/32

    CPC classification number: B01D67/003 ,  B01D63/02 ,  B01D67/0093 ,  B01D69/087 ,  B01D71/32 ,  B01D2323/18 ,  B01D2325/14 ,  C02F1/44

    Abstract: A preparation method of a perfluorinated polymer hollow fiber membrane comprises: evenly mixing a first mixture that is mixed by a perfluorinated polymer, PS, a polymer additive, and a composite pore-forming agent; evenly mixing a second mixture that is mixed by the first mixture and an organic liquid; under 300° C.-350° C., processing the second mixture with a melt to spin by a twin-screw extruder; extruding a hollow fiber by a hollow fiber spinneret; dipping the hollow fiber membrane into deionized water for 48 hours; putting the hollow fiber membrane aired into a concentrated sulfuric acid to process with a sulfonation; washing the hollow fiber membrane by deionized water; and drying the hollow fiber membrane; in such a manner that the hydrophilic perfluorinated polymer hollow fiber membrane is obtained.

    Abstract translation: 全氟化聚合物中空纤维膜的制备方法包括：将由全氟化聚合物PS，聚合物添加剂和复合成孔剂混合的第一混合物均匀混合; 均匀混合由第一混合物和有机液体混合的第二混合物; 在300℃-350℃下，用熔融物处理第二混合物通过双螺杆挤出机旋转; 通过中空纤维喷丝头挤出中空纤维; 将中空纤维膜浸入去离子水中48小时; 将中空纤维膜放入浓硫酸中进行磺化处理; 用去离子水清洗中空纤维膜; 并干燥中空纤维膜; 以这样的方式获得亲水性全氟化聚合物中空纤维膜。

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