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首页> 外文期刊>Journal of Applied Polymer Science >Spinning-assist layer-by-layer assembled polysulfonamide membrane for reverse osmosis from naphthalene-1,3,6-trisulfonylchloride and piperazine
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Spinning-assist layer-by-layer assembled polysulfonamide membrane for reverse osmosis from naphthalene-1,3,6-trisulfonylchloride and piperazine

机译：旋转辅助层组装的聚硫氧基酰胺膜，用于从萘-1,3,6-三磺酰氯化物和哌嗪的反渗透

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摘要

Polysulfonamide (PSA), with its chemical stability and acid-resistance, is seen as a potential material for reverse osmosis. However, the present PSA thin film composite membranes fabricated via prevailing interfacial polymerization (IP) approach generally exhibited nonfavored desalination performance. In this work, PSA membrane was assembled via spinning-assist layer-by-layer (sLbL) on a poly(vinyl alcohol) modified polyethersulfone substrate. Fabrication was carried out through sequential interfacial reaction between naphthalene-1,3,6-trisufonylchloride and piperazine by alternately dipping and drying the substrate in two monomer phases. Morphology, chemical composition, surface charge distribution as well as surface hydrophilicity were investigated as a function of repeated cycles. The sLbL assembly approach implemented facile control over membrane properties with well-organized selective layer thickness growth and twofold to threefold reduced surface roughness. As measured from spectroscopic ellipsometry, the sLbL assembled membranes exhibited a linear thickness growth at similar to 2.72nm per layer. Performance test indicated that the salt rejection and water flux showed a trade-off pattern with increasing layer number. The PSA membrane with five layers showed a preferable NaCl rejection of 95.7 +/- 0.4% with a water flux of 12.4 +/- 0.9Lm(-2) h(-1) at 10bar, whereas the IP membrane exhibited only 58% and a 22.12Lm(-2) h(-1) flux. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47138.
机译：具有化学稳定性和耐酸性的多硫氧酰胺（PSA）被视为反渗透的潜在材料。然而，通过主要界面聚合（IP）方法制造的本发明的PSA薄膜复合膜通常表现出非含脱盐性能。在这项工作中，PSA膜通过在聚（乙烯醇）改性的聚醚砜基底上通过纺丝辅助层 - 逐层（SLBL）组装。通过在两种单体相中交替浸渍并干燥基材，通过萘-1,3,6-三磺酰氯化物和哌嗪之间的连续界面反应进行制造。作为反复循环的函数，研究了形态学，化学成分，表面电荷分布以及表面亲水性。 SLBL组装方法通过良好组织的选择性层厚度生长和双倍降低表面粗糙度，实现了对膜性能的容易控制。从光谱椭圆形测量测量，SLBL组装膜表现出类似于每层2.72nm的线性厚度生长。性能测试表明，盐排斥和水通量显示了随着层数增加的折衷模式。具有五层的PSA膜在10BAR下，具有12.4 +/- 0.9LM（-2）H（-1）的水通量的优选NaCl排斥抑制95.7 +/- 0.4％，而IP膜仅表现出58％和22.12lm（-2）H（-1）通量。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47138。

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