公开(公告)号：US20180272289A1

公开(公告)日：2018-09-27

申请号：US15989202

申请日：2018-05-25

Applicant: TIANJIN POLYTECHNIC UNIVERSITY

Inventor： Changfa Xiao ,  Jingjing Yan ,  Chun Wang ,  Xiaoyu Hu ,  Mingxing Chen ,  Hailiang Liu ,  Shulin An

IPC: B01D69/08 ,  B01D71/34

CPC classification number: B01D69/088 ,  B01D67/0079 ,  B01D69/04 ,  B01D69/081 ,  B01D69/10 ,  B01D69/148 ,  B01D71/34

Abstract: A homogeneous fiber reinforced PVDF hollow fiber membrane and a preparation method thereof are provided. The membrane includes a hollow tubular reinforcement made of PVDF fibers and a polymer separation layer made of PVDF casting solution; wherein the polymer separation layer casting solution comprises 4-25% PVDF resin, 5-20% pore-forming agent, 0-3% inorganic particles and 52-91% solvent according to mass fraction. The preparation method includes steps of: (1) preparing a hollow tubular reinforcement made of PVDF fibers; (2) preparing a PVDF polymer separation layer casting solution; and (3) obtaining the homogeneous fiber reinforced PVDF hollow fiber membrane.

公开(公告)号：US09533266B2

公开(公告)日：2017-01-03

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: B01D67/00 ,  B01D39/00 ,  B01D33/21 ,  B01D69/00 ,  B29C47/00 ,  B29C47/88 ,  B01D71/56 ,  B01D63/02 ,  B01D69/12 ,  B01D69/14

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。

公开(公告)号：US09415348B2

公开(公告)日：2016-08-16

申请号：US14857879

申请日：2015-09-18

Applicant: TIANJIN POLYTECHNIC UNIVERSITY

Inventor： Changfa Xiao ,  Chun Wang ,  Mingxing Chen ,  Shulin An ,  Qinglin Huang

IPC: B01D33/21 ,  B01D39/00 ,  B01D39/14 ,  B29C47/00 ,  B29C47/88 ,  B29C47/80 ,  B01D69/08 ,  B01D71/56 ,  B29C47/10 ,  B01D69/14 ,  B29K105/16 ,  B29L31/00 ,  B29K77/00 ,  B29K471/00 ,  B29K509/00

CPC classification number: B01D69/087 ,  B01D69/148 ,  B01D71/56 ,  B29C47/0004 ,  B29C47/0011 ,  B29C47/0014 ,  B29C47/0023 ,  B29C47/0088 ,  B29C47/1063 ,  B29C47/40 ,  B29C47/8895 ,  B29K2077/10 ,  B29K2105/16 ,  B29K2471/00 ,  B29K2509/00 ,  B29L2031/755

Abstract: A method for preparing an aromatic polyamide porous hollow fiber membrane firstly premixes PPTA resin, solvent, composite pore-forming agents and inorganic particles in a stirring vessel to form casting solution, secondly injects the casting solution into a double-screw extruder to be fully dissolved under the effect of shear force and enters a spinneret via a metering pump. The PPTA hollow fiber membranes are prepared by the dry-wet spinning method, which solves the problems that hard pore-forming and low porosity in the preparation process of PPTA porous membrane. Utilization of the double-screw extruder is capable of greatly shortening the dissolved time and the deaeration time. Meanwhile the increase of PPTA in casting solution also improves mechanical properties of the PPTA membrane. The addition of the inorganic particles improves mechanical toughness and enhance pure water flux, hydrophilia and rejection rate.

Abstract translation: 制备芳族聚酰胺多孔中空纤维膜的方法首先将PPTA树脂，溶剂，复合成孔剂和无机颗粒预先混合在搅拌容器中以形成浇铸溶液，其次将浇注溶液注入双螺杆挤出机中以完全溶解 在剪切力的作用下，通过计量泵进入喷丝头。 PPTA中空纤维膜采用干湿法纺丝法制备，解决了PPTA多孔膜制备过程中硬孔成孔和孔隙率低的问题。 双螺杆挤出机的使用能够大大缩短溶解时间和脱气时间。 同时浇铸溶液中PPTA的增加也提高了PPTA膜的机械性能。 无机颗粒的添加提高了机械韧性，提高了纯水通量，亲水性和废水率。

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。

公开(公告)号：US10906006B2

公开(公告)日：2021-02-02

申请号：US15989202

申请日：2018-05-25

Applicant: TIANJIN POLYTECHNIC UNIVERSITY

Inventor： Changfa Xiao ,  Jingjing Yan ,  Chun Wang ,  Xiaoyu Hu ,  Mingxing Chen ,  Hailiang Liu ,  Shulin An

IPC: B01D69/08 ,  B01D71/34 ,  B01D69/10 ,  B01D69/14 ,  B01D69/04 ,  B01D67/00

Abstract: A homogeneous fiber reinforced PVDF hollow fiber membrane and a preparation method thereof are provided. The membrane includes a hollow tubular reinforcement made of PVDF fibers and a polymer separation layer made of PVDF casting solution; wherein the polymer separation layer casting solution comprises 4-25% PVDF resin, 5-20% pore-forming agent, 0-3% inorganic particles and 52-91% solvent according to mass fraction. The preparation method includes steps of: (1) preparing a hollow tubular reinforcement made of PVDF fibers; (2) preparing a PVDF polymer separation layer casting solution; and (3) obtaining the homogeneous fiber reinforced PVDF hollow fiber membrane.

公开(公告)号：US20160001234A1

公开(公告)日：2016-01-07

申请号：US14857879

申请日：2015-09-18

Applicant: TIANJIN POLYTECHNIC UNIVERSITY

Inventor： Changfa Xiao ,  Chun Wang ,  Mingxing Chen ,  Shulin An ,  Qinglin Huang

IPC: B01D69/08 ,  B29C47/00 ,  B29C47/10 ,  B01D71/56

CPC classification number: B01D69/087 ,  B01D69/148 ,  B01D71/56 ,  B29C47/0004 ,  B29C47/0011 ,  B29C47/0014 ,  B29C47/0023 ,  B29C47/0088 ,  B29C47/1063 ,  B29C47/40 ,  B29C47/8895 ,  B29K2077/10 ,  B29K2105/16 ,  B29K2471/00 ,  B29K2509/00 ,  B29L2031/755

Abstract: A method for preparing an aromatic polyamide porous hollow fiber membrane firstly premixes PPTA resin, solvent, composite pore-forming agents and inorganic particles in a stirring vessel to form casting solution, secondly injects the casting solution into a double-screw extruder to be fully dissolved under the effect of shear force and enters a spinneret via a metering pump. The PPTA hollow fiber membranes are prepared by the dry-wet spinning method, which solves the problems that hard pore-forming and low porosity in the preparation process of PPTA porous membrane. Utilization of the double-screw extruder is capable of greatly shortening the dissolved time and the deaeration time. Meanwhile the increase of PPTA in casting solution also improves mechanical properties of the PPTA membrane. The addition of the inorganic particles improves mechanical toughness and enhance pure water flux, hydrophilia and rejection rate.