Abstract
Detergency of liquid laundry detergents (L1, L2) before and after the addition of anionic surfactant sodium bis-(2-ethylhexyl) sulfosuccinate (AOT) was determined using colorimetric analysis based on the CIELab system. Standard cotton fabrics soiled with carbon black and olive oil were used in washing processes under the following conditions: the concentration range of detergents 1.25–50 g/L, water hardness 5.35 mval/L, 40 °C, rotational speed 200 rpm, 30 min washing cycle. Organoleptic and physicochemical properties of tested detergents as well as construction parameters of cotton fabrics were examined using a number of analytical methods. The research showed a gradual increase in detergency with laundry detergents and surfactants concentration. The modification with AOT had a positive effect on washing effectiveness by about 1.9% (AOT-L1) and 3.3% (AOT-L2) on average, as well as a significant reduction in foaming capacity of solutions. A synergistic effect was found through the interaction of all ingredients in solutions with higher concentrations. Based on the microscopic analysis, it was indicated that no damage occurred to the cotton textiles, but the presence of slight fraying of individual fibers. The research results suggest that enriching detergent compositions with a small amount of AOT favorably affects detergency efficiency, which may translate into practical application in industry in the future.
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