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Preparation and characterization of carboxymethyl cassia obovata gum and their utilization in textile printing
Author(s) -
ElMolla M. M.
Publication year - 2000
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20001001)282:1<51::aid-mame51>3.0.co;2-#
Subject(s) - materials science , textile , characterization (materials science) , polymer science , cassia , composite material , nanotechnology , medicine , alternative medicine , traditional chinese medicine , pathology
Cassia obovata gum was isolated from cassia obovata seeds, the yield of the gum was 22.5% of the original seed weight. The gum was subjected to chemical modification via carboxymethylation under a variety of conditions. Variables studied include concentration of the etherifying agents and the preparation medium. The modification increases the solubility of the gum in cold water, and increases the stability of its pastes to microorganisms. Pastes of these derivatives are characterized by non‐Newtonian pseudoplastic behavior regardless of their degree of substitution ( DS ) and/or preparation medium, while their apparent viscosity decreases by increasing the DS. The effect of storing of these pastes on the rheological properties was also studied. The overall fastness properties for the fabrics printed using carboxy methyl cassia obovata gum either alone or in admixture with sodium alginate and/or CMC before and after storing are nearly identical to those printed using the conventional thickeners.