| A cross linking treatment is reported for cotton fabric with DMDHEU (Dimethyl Dihydroxy Ethylene Urea) releases formaldehyde. Both formaldehyde and non-formaldehyde chemicals are used in the crease recovery finish. But the use of the formaldehyde chemicals in the garments experienced some other problems such as allergic, irritating in the human bodies. |
A cross linking treatment is reported for cotton fabric withDMDHEU (Dimethyl Dihydroxy Ethylene Urea) releases formaldehyde. Both formaldehydeand non-formaldehyde chemicals are used in the crease recovery finish. But theuse of the formaldehyde chemicals in the garments experienced some otherproblems such as allergic, irritating in the human bodies. An alternateapproach is to finish the fabric with free formaldehyde agents.
The non-formaldehyde chemicals used are EDTA, Boric Acid andSodium Acetate. These chemicals are used in the different material (cotton andpolycotton) with different proportions (and at two different temperature). Therelationship between various treated and untreated fabric properties areanalyzed.
Review
Cross-linking of cotton by mono and di-sodium salts ofphosphoric acid was reported by Gallagher. This work demonstrate thatEsterification of cellulose can occur at pH close to 7 and suggest that partialsalts of carboxylic acid might similarly cross link at elevated temperature.The study reported here is an exploration of the reaction of partials salts ofcarboxylic acid with cotton cellulose and a characterization of a variety of acotton cellulose polycarboxylates including the measure of the stability ofthese esterified cottons. Di- and polycarboxylic acids have been applied tocotton print cloth from aqueous system and cross linking Esterification havebeen accomplished at an elevated temperature. The reactions and the modifiedcotton have been characterized as functions several variables, including the pHof the aqueous polycarboxylic acid reagent and the structure of thepolycarboxylic acid.
It is evident from this exploratory extension of earlierstudies on carboxylic acid that di- and polycarboxylic acids react readily withcotton at elevated temperature following impregnation of the cotton with anaqueous solution of the carboxylic acid, partial sodium salts of the acid, or apartial or complete amine salt of the acid. The broad variety of di- andpolycarboxylic acids which reacts under these conditions affords a range ofproperties and potentialities.
About the Authors:
P.Gnanavel is the Lecturer in Dept. of Textile Technology at KSR College ofTechnology, Tiruchengode and N. Sukumar is the Lecturer in Dept. of TextileEngineering at Bahirdar University, Ethiopia, Africa
Comments