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Synthesis and Application of Reactive Carbohydrates. Part VI: Application of Reactive Carbohydrates Derived from Starch and Hydrolyzed Starches to Cotton Fabric
Author(s) -
Bayazeed A.,
Higazy A.,
Hebeish A.
Publication year - 1989
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19890410508
Subject(s) - starch , hydrolysis , curing (chemistry) , chemistry , catalysis , cellulose , carbohydrate , acrylamide , acid hydrolysis , formaldehyde , polymer chemistry , organic chemistry , polymer , copolymer
Native starch, 15 min, 30 min, 45 min and 60 min hydrolyzed starches were converted to reactive carbohydrates via graft polymerization with acrylamide followed by methylolation with formaldehyde. The reactive carbohydrates so obtained were applied to cotton fabric according to the conventional pad‐dry‐cure method under different conditions. The latter included the catalytic system and the curing conditions. The pad‐cure and the pad‐batch methods were also applicated. Examination of the treated fabrics for nitrogen content as a measure of the extent of reaction, occuring between the methylol groups of the reactive carbohydrate and the hydroxyl groups of cotton cellulose, as well as durability of the finish on the fabric indicated the dependance of the reaction and durability on nature of both reactive carbohydrate and catalyst as well as curing conditions. Reactive carbohydrate derived from 15 min hydrolyzed starch along with mixed catalyst, namely MgCl 2 · 6 H 2 O/citric acid (20:80), constitute the most appropriate finish/catalyst combination provided that application is carried out according to the pad‐dry‐cure method; drying is effected at 100°C for 2.5 min while curing is expedited at 130°C for 30 s.