Warmbier Ewelina, Altaee Ali, Różański Jacek, Kazwini Tayma, Różańska Sylwia, Ibrar Ibrar, Wagner Patrycja, Al-Ejji Maryam, Hawari Alaa H
Department of Chemical Engineering and Equipment, Faculty of Chemical Technology, Poznan University of Technology, ul. Berdychowo 4, PL 60-965 Poznan, Poland.
School of Civil and Environmental Engineering, University of Technology Sydney, 13 Broadway, Ultimo, Sydney, NSW 2007, Australia.
Langmuir. 2024 Jan 23;40(3):1707-1716. doi: 10.1021/acs.langmuir.3c02879. Epub 2024 Jan 5.
The impact of pH, temperature, and metal ions on the rheological and interfacial properties of aqueous mixed surfactant solutions composed of anionic NaC (sodium cholate) and nonionic BrijL4 [polyoxyethylene (4) lauryl ether] surfactants has been investigated. The various compound systems were analyzed, considering variations in each selected factor. The results highlight the unique characteristics of the BrijL4/NaC mixture, suggesting its potential as a viable alternative to other existing surfactants. The synergistic effect between BrijL4 and NaC significantly reduces the critical micelle concentration (CMC) and improves the wetting properties on hydrophobic surfaces, surpassing those of single-component solutions. Additionally, sodium, calcium, and magnesium ions enhance surface wetting and decrease the CMC. Besides, the BrijL4/NaC solutions exhibit viscoelastic fluid behavior at higher surfactant concentrations. These viscoelastic BrijL4/NaC solutions demonstrate stability over various pH and temperature variations, exhibiting lower flow activation and scission energy values than those of other viscoelastic surfactant solutions. Notably, the BrijL4/NaC mixture has potential applications in gel-based foliar fertilizers and drug delivery systems. Furthermore, the rheological studies examine the impact of humic acid on the rheological properties of BrijL4/NaC mixture solutions, revealing that incorporating additional humic acids can achieve stable rheological properties.
研究了pH值、温度和金属离子对由阴离子型胆酸钠（NaC）和非离子型聚氧乙烯（4）月桂醚（BrijL4）表面活性剂组成的水性混合表面活性剂溶液的流变学和界面性质的影响。考虑到每个选定因素的变化，对各种复合体系进行了分析。结果突出了BrijL4/NaC混合物的独特特性，表明其作为其他现有表面活性剂可行替代品的潜力。BrijL4和NaC之间的协同效应显著降低了临界胶束浓度（CMC），并改善了在疏水表面上的润湿性能，超过了单组分溶液。此外，钠、钙和镁离子增强了表面润湿并降低了CMC。此外，BrijL4/NaC溶液在较高表面活性剂浓度下表现出粘弹性流体行为。这些粘弹性BrijL4/NaC溶液在各种pH值和温度变化下都表现出稳定性，与其他粘弹性表面活性剂溶液相比，具有更低的流动活化能和断裂能值。值得注意的是，BrijL4/NaC混合物在凝胶基叶面肥料和药物递送系统中具有潜在应用。此外，流变学研究考察了腐殖酸对BrijL4/NaC混合溶液流变学性质的影响，结果表明加入额外的腐殖酸可以实现稳定的流变学性质。
