将壳聚糖分别溶于盐酸和乙酸水溶液,与不同比例的甘油磷酸酯二钠盐(GPDS)复配,并通过旋转粘度计测量匀速升温条件下复配溶液粘度的变化确定其凝胶化转变温度和时间;差示扫描量热法测定体温致壳聚糖凝胶化转变的温度和热量.结果表明:此系列复配溶液的粘度随温度升高均增加,并出现粘度曲线向上的拐点,对应的温度即其凝胶化转变温度,凝胶化转变温度随GPDS用量增加而降低.其中:溶于100 mL乙酸水溶液的复配溶液,升温速率为0.8℃/min,当壳聚糖与GPDS质量比为2.7 g:6.0 g时,凝胶化转变温度为42℃,达到凝胶化转变温度的时间约25 min;溶于100 mL,盐酸水溶液的复配溶液,升温速率为0.5℃/min,当壳聚糖与GPDS质量比为2.0 g:6.0 g时,凝胶化转变温度接近体温37℃,达到凝胶化转变温度的时间约24 min.差示扫描量热法未观察到此体温致壳聚糖凝胶化转变的热量.
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