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）。