Interaction of carboxylic acids with chitosan: effect of pK and hydrocarbon chain length.
Interaction of carboxylic acids with chitosan: effect of pK and hydrocarbon chain length.
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DOI：
10.1006/jcis.2002.8248
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发表时间：
2002-05
影响因子：
9.9
通讯作者：
M. V. Shamov;S. Bratskaya;V. Avramenko
中科院分区：
文献类型：
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作者：
M. V. Shamov;S. Bratskaya;V. Avramenko
研究了水溶液和水/乙醇混合物中乙酸、丙酸、丁酸、戊酸和异戊酸在壳聚糖和交联壳聚糖上的吸附。 Langmuir、Freundlich 和 Redlich-Peterson 方程用于拟合实验吸附等温线。发现水溶液中壳聚糖的最大吸附量与每种羧酸的 pK 值之间存在相关性，而水/乙醇混合物中的吸附主要由羧酸的结构和烃链长度决定。交联壳聚糖对羧酸的吸附存在轻微的分子筛效应。
Sorption of acetic, propionic, butyric, valeric, and isovaleric acid on chitosan and cross-linked chitosan was studied in aqueous solutions and water/ethanol mixtures. Langmuir, Freundlich, and Redlich-Peterson equations were used to fit experimental isotherms of sorption. Correlation between maximum sorption and the pK value of every carboxylic acid was found for sorption on chitosan in aqueous solutions, while sorption in water/ethanol mixtures was mainly determined by structure and the hydrocarbon chain length of the carboxylic acid. Slight molecular-sieves effect was found for carboxylic acids sorption on cross-linked chitosan.