Petrochemical Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, P.O. Box 2455, Saudi Arabia.
Carbohydr Polym. 2013 Feb 15;92(2):1844-9. doi: 10.1016/j.carbpol.2012.11.045. Epub 2012 Nov 23.
Cotton fabric was bleached in a simple and economic process using a bleaching system composed of hydrogen peroxide activated with thiourea. Different bleaching trials were carried out with varying hydrogen peroxide and thiourea concentrations, as well as the bleaching medium temperature. The obtained results reveal that bleached cotton fabric with satisfactory whiteness index and reasonable tensile strength can be obtained by treating the fabric at 90 °C in a bleaching bath containing 6 g/l hydrogen peroxide, 1.5 g/l thiourea and 1 g/l non-ionic wetting agent using a material to liquor ratio of 1:20. These optimum conditions lead to completion of the bleaching process in a reasonable duration of 1h. Lower concentrations of the activator thiourea were found to prolong the bleaching duration without getting satisfactory whiteness index. Higher concentrations of the activator were found to cause early termination of the oxidizing species leading to bad whiteness index.
棉织物采用由氢过氧化物和硫脲组成的漂白体系在简单且经济的工艺中进行漂白。不同的漂白试验在不同的过氧化氢和硫脲浓度以及漂白介质温度下进行。得到的结果表明，通过在含有 6 g/l 过氧化氢、1.5 g/l 硫脲和 1 g/l 非离子润湿剂的漂白浴中，在 90°C 下处理织物，浴比为 1:20，可获得具有令人满意的白度指数和合理的拉伸强度的漂白棉织物。这些最佳条件可在合理的 1 小时内完成漂白过程。较低浓度的活化剂硫脲会延长漂白时间，而无法获得令人满意的白度指数。较高浓度的活化剂会导致氧化物种提前终止，从而导致白度指数变差。
