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首页> 外文期刊>Journal of Applied Polymer Science >Thin-film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination
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Thin-film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination

机译：由聚氯乙烯/纤维素氨基甲酸酯基质制备的薄膜复合前进渗透膜及其在咸水脱盐中的潜在应用

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摘要

Synthesized by the reaction between alpha-cellulose and m-tolyl isocyanate (MTI), cellulose carbamate (CC) was blended with polyvinyl chloride (PVC) to fabricate substrates for thin-film composite (TFC) forward osmosis (FO) membranes. The introduction of CC into substrates improved both membrane structure and performance. The substrates exhibited higher porosity and hydrophilicity, and better connective pore structure; while rejection layer exhibited better morphology but limited cross-linked degree decrease after the introduction of CC. According to the results, the CC blend ratio of 10% was the optimal ratio. With this blend ratio, the TFC-10 membrane presented favorable water permeability (1.86 LMH/bar) and structure parameter (337 mu m), which resulted in excellent FO performance (water flux with a value of 40.40 LMH and specific salt flux with a value of 0.099 g/L under rejection layer faces draw solution [DS] mode when 1 M NaCl and deionized water were utilized as DS and feed solution). In addition, the TFC-10 membrane showed good water flux and low-sulfate ion leakage in the potential application of brackish water desalination.
机译：通过α-纤维素与间甲苯基异氰酸酯（MTI）反应合成氨基甲酸纤维素（CC），并将其与聚氯乙烯（PVC）共混，以制备薄膜复合（TFC）正渗透（FO）膜基质。在基质中引入CC改善了膜的结构和性能。基质具有更高的孔隙率和亲水性，以及更好的连通孔结构；而CC的引入使拒识层呈现出更好的形貌，但交联度降低有限。结果表明，10%的CC共混比是最佳配比。在这种混合比例下，TFC-10膜表现出良好的透水性（1.86 LMH/bar）和结构参数（337μm），从而产生了优异的FO性能（当使用1 m NaCl和去离子水作为DS和进料溶液时，在排斥层面对draw solution[DS]模式下，水通量为40.40 LMH，比盐通量为0.099 g/L）。此外，TFC-10膜在微咸水淡化的潜在应用中表现出良好的水通量和较低的硫酸盐离子泄漏。

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