Bleach catalysts: more sustainable compact laundry bleaching systems and the impact on fabrics

氧化漂白剂是洗衣粉中提供强大清洁性能的主要技术类别之一。它们在典型的粉末洗涤剂中也占很大比例，以过碳酸钙和四乙酰乙二胺（TAED）的形式提供。随着洗衣液行业向净零碳足迹配方过渡，符合将全球变暖控制在1.5摄氏度以内的迫切需要，配方策略将转向减少每剂量的总化学成分，更多地依赖催化化学。在漂白的情况下，这将意味着更多的关注金属氧化催化剂。这些技术以高效的方式提供高效的清洁，但可能对织物产生负面影响。本博士课程的目的是加深我们对催化剂对织物影响的理解，对导致任何负面影响的因素（染料相互作用、土壤影响、水质、洗涤温度、洗衣添加剂使用（氧基或氯基漂白剂））进行全面评估。这项研究将考虑到织物和染料前景的变化，因为金属催化剂在20世纪90年代中期曾被考虑用于洗衣洗涤剂。

Oxidative bleaches are one of the main technology classes that deliver strong cleaning performance in powder laundry detergents. They also make up a large proportion of a typical powder detergent, delivered in the form of percarbonate and tetraacetylethylenediamine (TAED). As the laundry detergent industry transitions to Net Zero carbon footprint formulations, in line with the urgent need to maintain global warming within 1.5 degrees C, formulation strategies will shift to a reduction in the total chemistry per dose, relying more on catalytic chemistry. In the case of bleach, this will mean more focus on metal oxidation catalysts. These technologies deliver efficient cleaning in a mass-efficient fashion but can have a negative impact on fabrics. The aim of this PhD will be to deepen our understanding of catalyst impact on fabrics, providing comprehensive evaluation of the factors leading to any negative impacts (dye interactions, impact of soil, water quality, wash temperature, laundry additive usage (oxygen- or chlorine-based bleaches)). The research will take into account the change in fabric and dye landscape since metal catalysts were previously considered for use in laundry detergents in the mid-1990s.