The present invention relates to highly selective ultrathin polymer nanofilm; its composite membrane; its method of preparation. Composite membranes are produced via interfacial polymerization with addition of surface active reagents (SLS) to aqueous phase of piperazine amine and reacted with trimesoyl chloride. Fabricated ultrathin polymer nanofilm composite membrane gives high water permeance in range of 47.9 – 59.6 Lm-2h-1bar-1 with high rejection of Na2SO4 (91.77 – 98.47 %); low rejection of MgCl2 (3.2 – 10.0 %); NaCl (8.9 – 15.3 %); high water permeance in range of 8.1 – 16.4 Lm-2h-1bar-1 with high rejection of Na2SO4 (99.81 – 99.99%); high rejection of MgCl2 (96.7 – 98.4%); NaCl (42.1 – 56.9 %) when tested under 5 bar applied pressure at 25 (±1) oC with 2 gL-1 feed. Ideal salt selectivity for NaCl/Na2SO4 is in range of 296.3 – 4310.
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机译：本发明涉及高度选择性超薄聚合物纳米膜;它的复合膜;它的制备方法。通过在哌嗪胺的水相中加入表面活性试剂（SLS）并与Timesoyl氯反应反应，通过界面聚合产生复合膜。制造的超薄聚合物纳米膜复合膜，可提供高水渗透率，范围为47.9-59.6Lm -2 h -1 bar -1 ，具有高拒绝na 2 SO 4 （91.77 - 98.47％）;低抑制MgCl 2 （3.2 - 10.0％）; NaCl（8.9-15.3％）;高于8.1-16.4 Lm -2 h -1 bar -1 ，具有高拒绝Na 2 2 /。 Sub> So 4 （99.81 - 99.99％）;高抑制mgcl 2 （96.7-98.4％）;当用2GL -1 / sup>饲料时，在5（±1）的5（±1） o c下测试时，NaCl（42.1-56.9％）。 NaCl / Na 2 SO 4 的理想盐选择性为296.3 - 4310。
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