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首页> 外文期刊>Fibres & textiles in Eastern Europe >Application of Raman Spectroscopy for Evaluation of Chemical Changes in Dibutyrylchitin Fibres
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Application of Raman Spectroscopy for Evaluation of Chemical Changes in Dibutyrylchitin Fibres

机译：拉曼光谱在二丁酰甲壳素纤维化学变化评估中的应用

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Microporous dibutyrylchitin (DBC) fibres formed by means of a dry-wet method were treated with aqueous solutions of potassium hydroxide. By applying various parameters of the alkaline treatment, fibres can be transformed into fibres from regenerated chitin or even into chitosan fibres. In the first stage, with the application of 5% KOH solutions and temperatures ranging from 20 to 90 degrees C, fibres from regenerated chitin were obtained. The subsequent treatment stage with saturated KOH solutions and the temperature range 70-140 degrees C resulted in obtaining fibres from chitosan with different deacetylation degrees. Structural changes in the fibres occurring in the course of their chemical treatment were analysed using RAMAN spectroscopy. Raman spectra were next mathematically processed by means of GRAMS software within the range 1800-820 cm(-1) in order to evaluate the changes quantitatively. A new method is described for the determination of butyrylation and deacetylation degrees of dibutyrylchitin, chitin and chitosan. Analysis of the fibres obtained carried out by means of RAMAN spectroscopy proves that in the process gradual degradation of the polymer chains takes place.
机译：用氢氧化钾水溶液处理通过干湿法形成的微孔二丁酰甲壳素（DBC）纤维。通过应用碱处理的各种参数，可以将纤维从再生的几丁质转化为纤维，甚至转化为脱乙酰壳多糖纤维。在第一步中，使用5％KOH溶液和20至90摄氏度的温度，从再生几丁质中获得纤维。随后用饱和KOH溶液和70-140℃的温度范围进行处理的步骤导致从脱乙酰度不同的壳聚糖获得纤维。使用RAMAN光谱分析了化学处理过程中发生的纤维结构变化。接下来，通过GRAMS软件在1800-820 cm（-1）范围内对拉曼光谱进行数学处理，以便定量评估变化。描述了一种测定二丁酰甲壳素，甲壳素和壳聚糖的丁酰化和脱乙酰度的新方法。通过拉曼光谱对获得的纤维进行的分析证明，在该过程中聚合物链逐渐发生降解。

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