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专利名称：Method for preparing homogeneous braid-reinforced PPTA hollow fiber membrane
发明人：Changfa Xiao,Chun Wang,Mingxing
Chen,Qinglin Huang,Hailiang Liu
申请号：US14857874申请日：20150918公开号：US09533266B2公开日：20170103
摘要：A method for preparing a homogeneous braid-reinforced (HMR) PPTA hollowfiber membrane combines PPTA hollow tubular braids with PPTA surface separationlayer. The method includes following steps of: (1) preparing the PPTA hollow tubularbraids, wherein the PPTA hollow tubular braids which are made from PPTA filament yarnsare woven by a two-dimensional braided method, the outer diameter of the PPTA tubularbraids 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-% inorganic acid solvent, stirred for 1-3 hours at 70°C.-90° C. to form homogeneous and transparent casting solution; and (3) preparingreinforced PPTA hollow fiber membrane, wherein the casting solution as the surfaceseparation layer is evenly coated on the surfaces of the PPTA hollow tubular braidsthrough spinneret, and they are immersed in a coagulation bath for solidified formation.
申请人：TIANJIN POLYTECHNIC UNIVERSITY
地址：Tianjin CN
国籍：CN
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