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壳聚糖是地球上蕴藏量最丰富的有机物之一。常用的壳聚糖相对分子质量大,不易溶于水等普通溶剂,使其应用受到极大限制。使用γ-射线(3x1015Bq钴-60装置)辐照壳聚糖,研究了溶液浓度、辐照剂量、辐照气氛、pH值和样品状态等因素在壳聚糖γ-射线辐照过程中对相对分子质量的影响。结果表明壳聚糖辐射降解产物的平均分子量随着溶液浓度增加和辐照剂量增大而降低,而与溶液的pH值无关。水对于壳聚糖辐射裂解有加速效应,溶液态壳聚糖辐照降解比固态辐照可以提高效率约50倍。
Chitosan is one of the most abundant organic matter on earth. Commonly used chitosan relative molecular mass, not easily soluble in water and other common solvents, so that its application has been greatly limited. Chitosan was irradiated by γ-ray (3x1015Bq cobalt-60), and the effects of solution concentration, irradiation dose, irradiation atmosphere, pH value and sample state on the chitosan γ-ray irradiation were studied. The impact of molecular quality. The results showed that the average molecular weight of chitosan radiation-degraded products decreased with increasing solution concentration and radiation dose, but not with pH value of solution. Water has an accelerated effect on the chitosan radiation cleavage. The irradiation degradation of solution chitosan can improve the efficiency by about 50 times than the solid state irradiation.