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首页> 外文期刊>Journal of Applied Polymer Science >Polyelectrolye complex formation between alginate and chitosan as a function of pH
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Polyelectrolye complex formation between alginate and chitosan as a function of pH

机译：海藻酸盐和壳聚糖之间的聚电解质复合物形成与pH的关系

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Chitosan and alginate are two polyelectrolytes that can be used as thickening agents in the food industry, in drug-release systems in pharmaceutical applications as biomaterials in wound healing, and cell culture applications, or as ion exchange material for the removal of heavy metal ions from industrial wastewaters. These two polysaccharides can also be used together to form a polyelectrolyte complex, especially to encapsulate proteins, cells, and enzymes. Although there are many applications of these polyions, few publications explain the interaction between their functional groups. This is mostly because of the difficulty of following ionic interaction in an interface of macromolecules, especially since they alter much with the reaction conditions such as pH. The present study reveals the interaction between chitosan and alginate at different pH values by means-of a particular method for Fourier transform infrared (FTIR) studies. A previously reported disagreement between the yield of the complexes in weight and density of the interacting functional groups is explained through this method. The obtained results are supported with the morphological studies of the polyelectrolyte beads prepared at different pH values. Freeze-dried beads of both alginate and chitosan-coated alginate beads could be viewed after hexamethyl disilazane (HNIDS) treatment. (C) 2003 Wiley Periodicals, Inc. [References: 18]
机译：壳聚糖和藻酸盐是两种聚电解质，可在食品工业中用作增稠剂，在药物应用中的药物释放系统中用作伤口愈合的生物材料和细胞培养应用，或用作离子交换材料以从中去除重金属离子工业废水。这两种多糖也可以一起形成聚电解质复合物，特别是用于包裹蛋白质，细胞和酶。尽管这些聚离子有许多应用，但很少有出版物解释它们的官能团之间的相互作用。这主要是由于难以跟随大分子界面中的离子相互作用，特别是因为它们会随反应条件（例如pH）而发生很大变化。本研究通过特定的傅里叶变换红外（FTIR）研究方法揭示了壳聚糖和藻酸盐在不同pH值之间的相互作用。通过该方法解释了先前报道的复合物的重量和相互作用官能团的密度之间的分歧。获得的结果得到了在不同pH值下制备的聚电解质珠粒的形态研究的支持。六甲基二硅氮烷（HNIDS）处理后，可以观察到藻酸盐和壳聚糖涂层藻酸盐珠的冻干珠。 （C）2003 Wiley Periodicals，Inc. [参考：18]

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