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首页> 外文期刊>Journal of Applied Polymer Science >New route to the preparation of carboxymethylchitosan hydrogels
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New route to the preparation of carboxymethylchitosan hydrogels

机译：羧甲基壳聚糖水凝胶制备的新途径

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A new method to prepare CM-chitosan hydrogels was introduced with the use of steam. The procedure was simple and economical, with no toxic chemicals involved. The steam-induced crosslinking of CM-chitosan sodium salt involved the -NH2 and -COONa groups, forming amide linkages (-CONH-), evidently supported by FTIR spectroscopy and other techniques. The hydrogels instantly imbibed a great deal of water. The degree of swelling (DS) of the hydrogels was found to be up to 36, depending on the harshness of steaming conditions used. Likewise, the coloration of the samples increased from light beige to brown with increasing temperature and duration of steam exposure. The overall efficiency of the steam method for the crosslinking of CM-chitosan sodium salt was quite high. The percentage weight loss was found to be less than 10 to obtain hydrogels with DS values around 20. No weight loss in the dry weight of the fractionated hydrogels was observed when the samples were steamed at 115degreesC or higher for 15 min or longer. (C) 2003 Wiley Periodicals, Inc. [References: 10]
机译：介绍了一种利用蒸汽制备CM-壳聚糖水凝胶的新方法。该过程简单且经济，不涉及有毒化学物质。蒸汽诱导的CM-壳聚糖钠盐的交联涉及-NH2和-COONa基团，形成酰胺键（-CONH-），这显然受到FTIR光谱学和其他技术的支持。水凝胶立即吸收了大量的水。发现水凝胶的溶胀度（DS）高达36，这取决于所用蒸汽条件的苛刻性。同样，随着温度和蒸汽暴露时间的延长，样品的颜色从浅米色变为棕色。蒸汽法用于CM-壳聚糖钠盐交联的总效率非常高。发现重量损失百分数小于10，以获得DS值约为20的水凝胶。当将样品在115℃或更高温度下蒸煮15分钟或更长时间时，未观察到分馏水凝胶的干重的重量损失。 （C）2003 Wiley Periodicals，Inc. [参考：10]

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