Abstract
Abstract Enzymes and surfactants are both essential ingredients that determine the performance of modern laundry detergents. We have conducted an investigation of the interaction of surfactants and enzymes under laundry detergent application conditions in order to understand the influence of individual ingredients and to optimize detergent performance. We can show that for a given protease enzyme, individual surfactants in a constant detergent matrix have a significant impact on relevant stability and performance parameter. While certain anionic surfactants like e.g. linear alkylbenzene sulfonate show strong protease inactivation, nonionic surfactants did only show slight inactivation over time. On the other hand, proteolytic performance of protease on test stains was most driven by fatty alcohol ether sulfate. Knowledge about the impact of individual surfactants on proteases will enable the best choice of ingredients for mixed surfactant systems with optimized enzyme performance and stability.
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