Rather Sami-Ullah, Rahman Md Habibur, Bamufleh Hisham S, Alhumade Hesham, Taimoor Aqeel Ahmad, Saeed Usman, Sulaimon Aliyu Adebayo, Alalayah Walid M, Shariff Azmi Mohd, Hoque Md Anamul
Department of Chemical and Materials Engineering, King Abdulaziz University, P.O. Box, 80204, Jeddah, 21589, Saudi Arabia.
Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.
Int J Biol Macromol. 2023 Apr 30;235:123761. doi: 10.1016/j.ijbiomac.2023.123761. Epub 2023 Feb 20.
The polymer-surfactant mixture has usages in numerous industries mainly in the production of daily used materials. Herein, the micellization and phase separation nature of the sodium dodecyl sulfate (SDS) and TX-100 along with a synthetic water-soluble polymer-polyvinyl alcohol (PVA) have been conducted using conductivity and cloud point (CP) measurement tools. In the case of micellization study of SDS + PVA mixture by conductivity method, the CMC values were obtained to be dependent on the categories and extent of additives as well as temperature variation. Both categories of studies were performed in aq. solutions of sodium chloride (NaCl), sodium acetate (NaOAc), and sodium benzoate (NaBenz) media. The CP values of TX 100 + PVA were decreased and enhanced in simple electrolytes and sodium benzoate media respectively. In all cases, the free energy changes of micellization (∆G) and clouding (∆G) were obtained as negative and positive respectively. The enthalpy (∆H) and entropy (∆S) changes for SDS + PVA system micellization was negative and positive respectively in aq. NaCl and NaBenz media, and in aq. NaOAc medium the ∆H values were found negative while ∆S were found negative except at the highest studied temperature (323.15 K). The enthalpy-entropy compensation of both processes was also assessed and described clearly.
聚合物 - 表面活性剂混合物在众多行业中都有应用，主要用于生产日用材料。在此，利用电导率和浊点（CP）测量工具对十二烷基硫酸钠（SDS）、TX - 100与合成水溶性聚合物聚乙烯醇（PVA）的胶束化和相分离性质进行了研究。在通过电导率法对SDS + PVA混合物进行胶束化研究的情况下，发现临界胶束浓度（CMC）值取决于添加剂的种类和用量以及温度变化。这两类研究均在氯化钠（NaCl）、醋酸钠（NaOAc）和苯甲酸钠（NaBenz）介质的水溶液中进行。TX 100 + PVA的CP值在简单电解质和苯甲酸钠介质中分别降低和升高。在所有情况下，胶束化（∆G）和浊化（∆G）的自由能变化分别为负和正。在氯化钠水溶液和苯甲酸钠介质中，SDS + PVA体系胶束化的焓变（∆H）和熵变（∆S）分别为负和正，而在醋酸钠水溶液介质中，除了在最高研究温度（323.15 K）外，∆H值为负，∆S值也为负。还对这两个过程的焓 - 熵补偿进行了评估并清晰描述。
