Comparative performance evaluation of conventional and ultrasonic assisted bleaching of cotton fabric

Conventional bleaching process is an important and quality influencing process for textile wet processors. however,the process requires high energy consumption,and is slow and time consuming. in the present research work,cotton woven fabric was bleached with different bleaching agents using conventional and ultrasonic assisted techniques. after bleaching whiteness index,weight loss and tensile strength of samples were measured and compared statistically. the results showed that ultrasonic energy intensifies the diffusion of chemicals and increases the production of hydroxyl radicals which catalyze the bleaching process. ultrasonic assisted bleaching proved to be a novel technique that can produce better results than conventional bleaching process even at low temperature and in less time.