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首页> 外文期刊>Journal of Polymers and the Environment >Highly Size-Selective Water-Insoluble Cross-Linked Carboxymethyl Cellulose Membranes
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Highly Size-Selective Water-Insoluble Cross-Linked Carboxymethyl Cellulose Membranes

机译：高度选择性的水不溶性交联羧甲基纤维素膜

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Carboxymethyl cellulose (CMC) membranes have strong potential for application as molecular-scale separators. For this study, stable CMC membranes were fabricated with aluminum chloride (AlCl3) and iron(III) chloride (FeCl3) serving as cross-linkers. The resulting CMC-Al and CMC-Fe membranes were optically transparent and water-insoluble with sufficient mechanical strength for practical applications. The water permeation flux through the membranes was directly proportional to the operating pressure. With just a 10-fold increase in the molecular weight from 60 Da (urea) to 604 Da (bordeaux S), the effective diffusion coefficient (D-eff) of the CMC-Al membrane increased 56-fold, and that of the CMC-Fe membrane increased 3500-fold. This significant correlation between D-eff on molecular size indicated that the sizes of the mass transfer channels through the membrane were strictly monodisperse, in the range of molecular sizes that were tested.
机译：羧甲基纤维素（CMC）膜具有很强的潜力，可以用作分子规模的隔膜。对于本研究，使用氯化铝（AlCl3）和氯化铁（III）（FeCl3）作为交联剂制备了稳定的CMC膜。所得的CMC-Al和CMC-Fe膜是光学透明的和水不溶性的，具有足够的机械强度用于实际应用。通过膜的透水通量与工作压力成正比。从60 Da（尿素）到604 Da（波尔多S）的分子量仅增加10倍，CMC-Al膜的有效扩散系数（D-eff）增加了56倍，而CMC的有效扩散系数增加了56倍。 -铁膜增加了3500倍。 D-eff与分子大小之间的这种显着相关性表明，在测试的分子大小范围内，穿过膜的传质通道的大小严格是单分散的。

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