Carboxymethylation of Fenugreek Gum

A. A. Abdel Rahman

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Carboxymethylation of Fenugreek Gum

机译：胡芦巴胶的羧甲基化

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摘要

Fenugreek gum was first isolated from Egyptian Fenugreek seeds. It was then subjected to chemical modification via carboxymethy-lation in aqueous and nonaqueous media using different concentrations of mono- chloroacetic acid and sodium hydroxide. Results obtained indicate that the extent of Carboxymethylation reaction, expressed as degree of substitution (D. S.), increases by increasing the concentration of mon-ochloroacetic acid and sodium hydroxide. Reaction medium does also affect the D. S. Carboxymethylation renders the Fenugreek gum water soluble irrespective of the D. S. Pastes prepared from the carboxymethyl derivatives are characterized by non-Newtonian pseudo plastic behaviour. Apparent viscosity relies on D. S. and reaction medium.

机译：胡芦巴胶首先从埃及胡芦巴种子中分离出来。然后使用不同浓度的一氯乙酸和氢氧化钠，通过羧甲基化在水性和非水性介质中对其进行化学修饰。获得的结果表明，通过取代一氯乙酸和氢氧化钠的浓度，羧甲基化反应的程度以取代度（D.S.）表示。反应介质的确也会影响D. S.羧甲基化使胡芦巴胶水溶性，而与D. S.无关。由羧甲基衍生物制备的糊状物的特征在于非牛顿的拟塑性行为。表观粘度取决于D.S.和反应介质。

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来源
《Bulletin of the National Research Centre》 |2003年第2期|p.185-194|共10页
作者
A. A. Abdel Rahman;
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作者单位

Textile Research Division, National Research Centre, Dokki, Cairo, Egypt;

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原文格式 PDF
正文语种 eng
中图分类自然科学总论;
关键词
fenugreek gum; monochloroacetic acid; sodium hydroxide; ethyl alcohol and toluene;

机译：胡芦巴胶;一氯乙酸;氢氧化钠;乙醇和甲苯;

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Carboxymethylation of Fenugreek Gum

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