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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Preparation and characterization of carboxymethylated β-chitins and their abilities of moisture absorption and retention
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Preparation and characterization of carboxymethylated β-chitins and their abilities of moisture absorption and retention

机译：羧甲基化β-几丁质的制备，表征及其吸湿和保水能力

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摘要

Carboxymethyl chitins (CM-chitins) with a high degree of substitution (DS), a low degree of deacetylation (DD), and high molecular weight were prepared directly from β-chitin and characterized using ~1H NMR, FT-IR, TA, potentiometric titration, and elemental analysis methods. CM-chitins with different molecular weight were prepared using ultrasonic degradation method. Their abilities of moisture absorption and retention were investigated. The moisture-absorption ratio and moisture-retention ratio of CM-chitins increased as their DS increased. The moisture-absorption ratio and moisture-retention ratio of CM-chitins with high DS were close to that of hyaluronic acid (HA). The effect of molecular weight (>10~6) of CM-chitin on its moisture-absorption ratio and moisture-retention ratio is neglectable.
机译：高取代度（DS），低脱乙酰度（DD）和高分子量的羧甲基几丁质（CM-几丁质）是直接由β-几丁质制备的，并使用〜1H NMR，FT-IR，TA，电位滴定和元素分析方法。采用超声降解法制备了不同分子量的CM-几丁质。研究了它们的水分吸收和保留能力。 CM-几丁质几丁质的吸水率和保水率随其DS的增加而增加。高DS的CM-几丁质几丁质的吸水率和保水率接近于透明质酸（HA）。 CM-几丁质的分子量（> 10〜6）对其吸水率和保水率的影响可以忽略。

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