Thin‐film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination,Journal of Applied Polymer Science

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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
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-10-12 , DOI: 10.1002/app.49939
Ke Zheng _{1,

2} , Shaoqi Zhou _{1,

2,

3,

4} , Zuqin Cheng ₂ , Guoru Huang _{1,

4}

Affiliation

Synthesized by the reaction between α‐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 μm), 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.

中文翻译：

以聚氯乙烯/氨基甲酸纤维素为基材的薄膜复合正渗透膜及其在微咸水淡化中的潜在应用

通过α-纤维素和间甲苯基异氰酸酯（MTI）之间的反应合成，将氨基甲酸酯纤维素（CC）与聚氯乙烯（PVC）混合在一起，以制造用于薄膜复合材料（TFC）正向渗透（FO）膜的基材。将CC引入基材中可改善膜结构和性能。基材表现出更高的孔隙率和亲水性，以及更好的连通孔结构；引入CC后，截留层表现出更好的形貌，但交联度下降有限。根据结果，CC混合比率为10％是最佳比率。在这种混合比下，TFC-10膜呈现出良好的透水性（1.86 LMH / bar）和结构参数（337μm），从而产生了出色的FO性能（水通量值为40）。当使用1 M NaCl和去离子水作为DS和进料溶液时，排阻层下的40 LMH和比盐通量值为0.099 g / L面对汲取溶液[DS]模式。此外，在微咸水淡化的潜在应用中，TFC-10膜表现出良好的水通量和低硫酸盐离子泄漏。

更新日期：2020-11-25

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