Polycarboxylic acids can crosslink cotton cellulose by forming ester bonds. The esterification reactions can be effectively catalyzed by sodium hypophosphite (SHP), which is a controlled chemical. After thoroughly studying the catalytic mechanisms of SHP in the reaction, several effective alternative catalyst were identified. Among them, sodium dichloroacetate was found possessing close catalytic efficacy as SHP in the reactions of 1,2,3,4-butanetetracarboxylic acid (BTCA) and 3,3',4,4',-benzophenone tetracarboxylic acid (BPTCA) with cotton cellulose, respectively. In addition, several aromatic polycarboxylic acids were selected as potential crosslinking agents for cotton fabrics. In this presentation, we will report our lab-scale research results and also pilot study results out at Cotton Incorporated. Detailed reaction mechanisms, wrinkle recovery angles, FTIT, and washing fastness results of the treated fabrics will be reported.
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