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首页> 外文期刊>Journal of Applied Polymer Science >Blend membranes from carboxymethylated chitosan/alginate in aqueous solution
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Blend membranes from carboxymethylated chitosan/alginate in aqueous solution

机译：在水溶液中混合羧甲基化壳聚糖/海藻酸酯的膜

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The blend membranes were satisfactorily prepared by coagulating a mixture of O-carboxymethylated chitosan (CM-chitosan) and alginate in aqueous solution with 5 wt % CaCl2, and then by treating with 1 wt% HCI aqueous solution. Their structure and miscibility were characterized by scanning electron micrograph, X-ray diffraction, infrared spectra, differential thermal analysis, and atomic absorption spectrophotometer. The results indicated that the blends were miscible, when the weight ratio of CM-chitosan to alginate was in the range from 1:1 to 1:5. The polymers interpenetration including a Ca2+ crosslinked bridge occurred in the blend membrane, and leads to high separation factor for pervaporation separation of alcohol/water and low permeation. The tensile strength in the wet state (sigma(b) = 192 kg cm(2) for CM-chitosan/alginate 1 : 1) and thermostability of the blend membranes were significantly superior to that of alginic acid membrane, and cellulose/alginate blend membranes, owing to a strong electrostatic interaction caused by -NH2 groups of CM-chitosan with -COOH groups of algic acid. (C) 2000 John Wiley & Sons, Inc. [References: 27]
机译：通过将O-羧甲基化壳聚糖（CM-壳聚糖）和藻酸盐的混合物在水溶液中与5％（重量）的CaCl2混凝，然后用1％（重量）的HCl水溶液处理，可以令人满意地制备共混膜。通过扫描电子显微照片，X射线衍射，红外光谱，差热分析和原子吸收分光光度计对它们的结构和混溶性进行了表征。结果表明，当CM-壳聚糖与藻酸盐的重量比在1：1至1：5的范围内时，共混物是可混溶的。在共混膜中发生了包括Ca 2+交联桥的聚合物互穿，并且导致用于醇/水的全蒸发分离的高分离因子和低渗透。湿态的拉伸强度（CM-壳聚糖/海藻酸酯1：1的sigma（b）= 192 kg cm（2））和共混膜的热稳定性显着优于藻酸膜和纤维素/海藻酸酯共混物膜，这是由于CM-壳聚糖的-NH2基与藻酸的-COOH基引起的强静电相互作用。 （C）2000 John Wiley＆Sons，Inc. [参考：27]

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