Abstract
A new cationic bleach activator (CBA) N-[4-pyridmoniomethyl)benzoyl]caprolactam bromide (PBCB) was synthesized and evaluated in a hot peroxide bleaching process. The effects of time, temperature and the concentrations of hydrogen peroxide and activator on the bleaching of cotton fabric were investigated using an orthogonal experimental method. The optimal bleaching process of PBCB-activated peroxide system was 5g/L H2O2, 0.5g/L CBA, 40°Cand 45min dwell time under neutral pH, with which a whiteness equivalent to that of the conventional-bleaching system was achieved, but the PBCB system resulted in almost no fiber damage based on fabric strength.
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