Abstract: Aiming at the problems existing in traditional cotton fabric bleaching such as high temperature and strength loss, a peroxide bleaching activator was prepared, and the main effective component was nonanoyloxybenzenesulfonate sodium(NOBS). The optimal synthetic conditions were as follows: 4-phenolsulfonate sodium was dissolved in sodium hydroxide solution, the mol ratio of sodium hydroxide to 4-phenolsulfonate sodium was 1:1. The mol ratio of nonanoyl chloride to 4-phenolsulfonate sodium was 1.3:1. Then nonanoyl chloride was added dropwise, followed by stirring at 30 ℃ for 80 min with 5% phase transfer catalyst tetrabutylammonium bromide and the peroxide bleaching activator was obtained. The results showed that addition of the activator to the scouring and bleaching process can lower the temperature of bleaching to 80 ℃ and similar effects were obtained. Compared to the traditional bleaching, the strength loss and the energy consumption was lower.

Key words: low temperature , bleaching , activator , preparation , application