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Wetting and Spreading of Commercially Available Aqueous Surfactants on Porous Materials

机译：多孔材料上市售水性表面活性剂的润湿和涂布

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The wetting properties of aqueous solutions of a commercially available surfactant at various concentrations on porous media are investigated using the KRUSS DSA100 shape analyzer and the ADVANCED software to process the data. Time evolution of both the contact angle and drop base diameter at each surfactant concentration after deposition were monitored. Three different porous substrates (sponges) were examined. The sponges used were a car sponge, dish sponge and audio sponge. The sponges were investigated both dry and at different degrees of saturation, that is, the amount of water absorbed into the sponge. It was found that pure distilled water droplets deposited on the dry porous media showed non-wetting. However, if droplets of surfactant solutions were deposited, then a change to a complete wetting case was found at all surfactant concentrations used. It has been observed that for all sponges, no matter the degree of saturation, they display a minimum contact angle after which the droplet is rapidly absorbed into the porous media.
机译：使用KRUSS DSA100形状分析仪和先进的软件来研究以各种浓度的多孔介质在各种浓度下进行市售表面活性剂水溶液的润湿性能。监测在沉积后每个表面活性剂浓度下接触角和下降基部直径的时间延伸。检查了三种不同的多孔基材（海绵）。使用的海绵是汽车海绵，碟形海绵和音频海绵。调查海绵干燥和不同程度的饱和度，即吸收到海绵中的水量。发现沉积在干燥多孔介质上的纯蒸馏水液滴显示出非润湿性。但是，如果沉积表面活性剂溶液的液滴，则在所有使用的表面活性剂浓度下发现对完全润湿壳的变化。已经观察到，对于所有海绵，无论饱和程度，它们都显示出最小的接触角，之后液滴快速吸收到多孔介质中。

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