Interaction of foams with porous materials is frequently observed in industry and nature. An example is the interaction of foam of a cleaning product with a sponge, which has been investigated previously in Johnson et al., Colloids Surfaces A, 2019, 579, June, p. 123569 with commercial dishwashing solution using a compression device with a sponge saturated with a surfactant solution. The purpose of this study is to investigate the same process using sodium dodecyl sulfate (SDS), which has the same critical micelle concentration (CMC) as the commercial surfactant used. It is found that SDS concentration 10 times the CMC is the optimum concentration for foam formation. Any further increase in concentration above 10 CMC does not result in further increase of foam mass. Although the concentration of the surfactant solution was the most important parameter, temperature and pH of the surfactant also influenced the foam generation. Increasing the temperature resulted in decreasing the mass of foam generated and pH 7 was found as the optimal pH for foam generation.

中文翻译：

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通过压缩软多孔材料形成十二烷基硫酸钠泡沫

在工业和自然界中经常观察到泡沫与多孔材料的相互作用。一个例子是清洁产品的泡沫与海绵的相互作用，Johnson 等人之前对此进行了研究，Coloids Surfaces A, 2019, 579, 六月, p. 123569 使用商业洗碗液，使用压缩装置，海绵中浸有表面活性剂溶液。本研究的目的是研究使用十二烷基硫酸钠 (SDS) 的相同工艺，其临界胶束浓度 (CMC) 与所用的商业表面活性剂相同。发现 10 倍于 CMC 的 SDS 浓度是泡沫形成的最佳浓度。浓度超过 10 CMC 的任何进一步增加都不会导致泡沫质量的进一步增加。虽然表面活性剂溶液的浓度是最重要的参数，但表面活性剂的温度和 pH 值也会影响泡沫的产生。提高温度导致产生的泡沫质量减少，并且发现 pH 7 是泡沫产生的最佳 pH 值。