Our prior work found that detergency of coconut oil was relatively poor using C_14‐15‐8PO‐SO₄Na alone but showed promising improvement with the presence of linear intermediate‐chain alcohols (C7–C9 alcohols) in the surfactant formulation. The maximum detergency exceeded 90% removal using 0.1 w/v% C_14‐15‐8PO‐SO₄Na/0.2 w/v% 1‐octanol/4 w/v% NaCl (final optimized surfactant system) at 10 °C. The current work thus seeks to further investigate surfactant formulations capable of providing improved detergency performance. Different 50% linear anionic extended surfactant structures (LC_14‐15‐8PO‐SO₄Na, LC_14‐15‐8PO‐3EO‐SO₄Na, and LC_14‐15‐8PO‐7EO‐SO₄Na) were compared with the branched C_14‐15‐8PO‐SO₄Na previously studied. Detergency of coconut oil using C_14‐15‐8PO‐SO₄Na at 8 w/v% NaCl (S*) still performed more effectively than these new surfactant systems. The addition of octanol as a detergency additive was further studied, and it showed that S* reduced from 8 w/v% NaCl to 4 w/v% NaCl for 1‐octanol and to 2 w/v% NaCl for 2‐octanol and 2‐ethyl‐hexanol in the C_14‐15‐8PO‐SO₄Na surfactant formulation. Coconut oil removal significantly improved detergency from roughly 49% for no alcohol with 8 w/v% NaCl, to 83% for 2‐ethyl‐hexanol with 2 w/v% NaCl, to 95% for 1‐octanol with 4 w/v% NaCl, and to 98% for 2‐octanol with 2 w/v% NaCl. Further studies on octanol concentration showed that decreasing 1‐octanol from 1.2% (90 mM) to 0.2% (15.3 mM) and 2‐octanol from 1.2% (90 mM) to 0.5% (38.5 mM) still maintained detergency over 90% removal. In this work, cold‐water detergency was found to correlate with low interfacial tension above the melting point, improved wetting of the semisolid soil, and oil solubilization in surfactant micelles.

中文翻译：

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表面活性剂体系，酒精类型和盐度对三酰甘油半固态土壤冷水去污力的影响。第二部分

我们以前的工作中发现椰子油的那去污力用C相对较差_14-15 -8PO-SO ₄的Na单独但表现出有希望的，在表面活性剂配方直链中间链醇（C7-C9醇）的存在改善。在10°C下使用0.1 w / v％C _14-15 -8PO-SO ₄ Na / 0.2 w / v％1-辛醇/ 4 w / v％NaCl（最终优化的表面活性剂体系），最大去污力超过90％。因此，当前的工作试图进一步研究能够提供改善的去污性能的表面活性剂配方。不同的50％直链阴离子表面活性剂延长结构（LC _14-15 -8PO-SO ₄的Na，LC _14-15 -8PO-3EO-SO ₄ Na和LC_14-15 -8PO-7EO-SO ₄ Na）的与支链C进行比较_14-15 -8PO-SO ₄的Na先前研究。与这些新的表面活性剂体系相比，使用C _14-15 -8PO-SO ₄ Na和8 w / v％NaCl（S *）进行椰子油的去垢效果仍然更好。进一步研究了添加辛醇作为去污添加剂的结果，结果表明S *从1-辛醇的8 w / v％NaCl降至4 w / v％NaCl，而2-辛醇和S *从NaCl降至2 w / v％NaCl 2-乙基己醇在C _14-15 -8PO-SO ₄钠表面活性剂配方。除去椰子油后，去污力显着提高，从无酒精（含8 w / v％NaCl的约49％）提高到83％（含2 w / v％NaCl的2-乙基己醇）至95％（含4 w / v的1-辛醇） NaCl浓度，对于2-辛醇和2 w / v％NaCl则为98％。对辛醇浓度的进一步研究表明，将1-辛醇从1.2％（90 mM）降低到0.2％（15.3 mM）和将2-辛醇从1.2％（90 mM）降低到0.5％（38.5 mM）仍能在90％去除率下保持去污力。在这项工作中，发现冷水去污力与高于熔点的低界面张力，半固态土壤的润湿性改善以及表面活性剂胶束中的油增溶有关。