Synthesis of carbamoylethyl Cassia angustifolia seed gum in an aqueous medium

被引：2

作者：

Rajput, Gaurav ^{[1
]}

Pandey, I. P. ^{[1
]}

Joshi, H. C. ^{[2
]}

机构：

[1] DAV Postgrad Coll, Dept Chem, Dehra Dun, Uttarakhand, India

[2] SGRR PG Coll, Dept Chem, Dehra Dun, Uttarakhand, India

来源：

CARBOHYDRATE POLYMERS | 2016年 / 136卷

关键词：

Cassia angustifolia seed gum; Carbamoylethylation; Nitrogen content; Non-Newtonian pseudoplastic behaviour; CHEMICAL-MODIFICATION; STARCH; GALACTOMANNAN;

D O I：

10.1016/j.carbpol.2015.10.044

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The Cassia angustifolia seed gum (CAG), a galactomannan, isolated from the seeds of C. angustifolia was subjected to the carbamoylethylation which involved the reaction of CAG with acrylamide in an aqueous medium (water) in the presence of alkali (NaOH) as a catalyst. Alkali concentration, acrylamide concentration, liquor:gum ratio as well as reaction temperature and time were found to affect the extent of carbamoylethylation of CAG (expressed in terms of nitrogen content) and so, these were optimized. Degree of substitution (DS) and reaction efficiency was also determined. FTIR revealed the successful carbamoylethylation of CAG and rheological study conducted on 1 and 2% (w/w) solutions of the carbamoylethyl-CAG not only brought out the non-Newtonian pseudoplastic behaviour, but also high stability of carbamoylethyl-CAG solutions in comparison to solutions of the unmodified CAG. (c) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1259 / 1264

页数：6

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