冻融循环对甲壳素凝聚态结构和脱乙酰反应的影响
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery（2009）
Abstract
甲壳素和质量分数为40%的浓NaOH溶液的混合物在-18℃和40℃条件下反复进行冻融处理,结果表明慢速冷冻加低温解冻的冻融循环处理过程中,冰晶的反复形成和重结晶能够破坏甲壳素凝聚态特别是晶态结构.经过3次冻融循环处理,可使甲壳素在NaOH溶液中完全溶解,获得甲壳素最终质量分数为4%,NaOH最终质量分数约为10%的均相溶液,为用均相脱乙酰法制备半脱乙酰水溶性甲壳素提供前提.
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Key words
Chitin,Crystal structure,Freezing-thawing cyclic treatment,Hydrogen bonds,N-deacetylation
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