Cyanoethylation of Cassia angustifolia seed gum in aqueous medium

被引：5

作者：

Rajput G. ^{[1
]}

Pandey I.P. ^{[1
]}

Joshi G. ^{[2
]}

Bisht S.S. ^{[3
]}

机构：

[1] Department of Chemistry, D.A.V. (PG) College, Dehradun, Uttarakhand

[2] Cellulose & Paper Division, Forest Research Institute, Dehradun, Uttarakhand

[3] Chemistry of Forest Products Division, Institute of Wood Science & Technology, Bangalore, Karnataka

来源：

Journal of the Indian Academy of Wood Science | 2015年 / 12卷 / 1期

关键词：

Cyanoethylation; Degree of substitution; Non-Newtonian pseudoplastic behaviour; Reaction efficiency; Seed gum;

D O I：

10.1007/s13196-015-0137-3

中图分类号：

学科分类号：

摘要：

The Cassia angustifolia seed gum (CAG) was isolated from the seeds of C. angustifolia and subjected to cyanoethylation by using acrylonitrile (AN) in presence of alkali (NaOH) in aqueous medium at different reaction conditions. The variables studied is comprised of alkali concentration, AN concentration, liquor:gum ratio as well as reaction temperature and time. The nitrogen content (%N), degree of substitution (DS) and reaction efficiency (RE) were determined. The optimum conditions for preparing cyanoethyl-CAG (%N = 6.36 %; DS = 0.969) comprised 0.100 mol of NaOH, 0.075 mol of acrylonitrile and liquor:gum ratio (v/w) of 10:1 at 45 °C for 60 min using 0.03 mol (as AGU, anhydroglucose unit) of CAG. RE was found to be 24.08 % under these conditions. Rheological studies of 1 and 2 % (w/v) cyanoethyl-CAG showed non-Newtonian pseudoplastic behaviour, relatively high viscosity, cold water solubility, solution stability and clarity as compared to the solutions of unmodified CAG. © 2015, Indian Academy of Wood Science.

引用

页码：1 / 8

页数：8

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