Physical and chemical parameters and thermodynamic behavior of sodium dodecyl sulfate in different concentrations of NaCl

doi:10.16085/j.issn.1000-6613.2018-1035

Chemical Industry and Engineering Progress ›› 2018, Vol. 37 ›› Issue (S1): 181-186.DOI: 10.16085/j.issn.1000-6613.2018-1035

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Physical and chemical parameters and thermodynamic behavior of sodium dodecyl sulfate in different concentrations of NaCl

JIA Qifeng¹, NI Xiaoming^1,2, WU Haiming³, LI Zhiheng¹

1 School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China;
2 Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region of Henan Province, Jiaozuo 454000, Henan, China;
3 Huabei Petroleum Tiancheng Industry Group Co., Ltd., Renqiu 062552, Hebei, China

Received:2018-05-21 Revised:2018-06-27 Online:2018-12-13 Published:2018-11-30

不同NaCl浓度下十二烷基硫酸钠的理化参数和热力学行为

贾奇锋¹, 倪小明^1,2, 吴海明³, 李志恒¹

1 河南理工大学能源科学与工程学院, 河南焦作 454000;
2 中原经济区煤层(页岩)气河南省协同创新中心, 河南焦作 454000;
3 华北石油天成实业集团有限公司, 河北任丘 062552

通讯作者: 贾奇锋(1994-),男,硕士研究生,主要从事煤储层压裂液化工配方方面的研究。
作者简介:贾奇锋(1994-),男,硕士研究生,主要从事煤储层压裂液化工配方方面的研究。E-mail:211602020019@home.hpu.edu.cn。
基金资助:
教育部创新团队发展支持计划（IRT_16R22）及河南省高校科技创新人才支持计划（15HASTIT050）项目。

Abstract

Abstract: In order to better study the effects on the physicochemical properties and structural stability of anionic surfactant micelles in different concentrations of NaCl, based on the critical micelle concentrations of anionic surfactant sodium dodecyl sulfate (C₁₂H₂₅SO₄Na) at different temperatures, the surface tension, foam half-life and viscosity of the solution under different concentrations of NaCl and different temperatures were measured and obtained respectively. On this basis, the thermodynamic parameters such as viscosity activation energy, standard entropy change and standard enthalpy change of the solution under NaCl action and their variation laws were obtained through analysis. The results show that the efficiency of sodium dodecyl sulfate in reducding surface tension is controlled by both temperature effect and salt effect. With the increase of temperature, the temperature effect plays an increasingly important role. The surfactant concentration corresponding to the maximum viscosity is the critical micelle concentration at these temperature and NaCl concentration. The effect of C₁₂H₂₅SO₄Na micellization process was gradually transformed from entropy driven to enthalpy driven with the increase of temperature, and the transformation process was more and more advanced with the increase of NaCl concentration. To understand the coupling effects of temperature and NaCl concentration on the physical and chemical properties of C₁₂H₂₅SO₄Na, so as to lay a foundation for further study of its thermodynamic behavior.

Key words: sodium chloride, sodium dodecyl sulfate, thermodynamic parameter, temperature, driven

摘要： 为了更好地研究不同NaCl浓度对阴离子表面活性剂胶束理化性质和结构稳定性的影响，以阴离子表面活性剂十二烷基硫酸钠（C₁₂H₂₅SO₄Na）在不同温度下的临界胶束浓度为基础，分别测试并得出了不同NaCl浓度与不同温度作用下溶液的表面张力、泡沫半衰期和黏度变化规律。在此基础上通过分析得出NaCl作用下溶液的黏度活化能、标准熵变、标准焓变等热力学参数及变化规律。结果表明：C₁₂H₂₅SO₄Na降低表面张力的效率由温度效应和盐效应共同控制，随着温度的升高，温度效应发挥的作用越来越大；黏度最大值所对应的表面活性剂浓度为该温度和NaCl浓度下的临界胶束浓度；C₁₂H₂₅SO₄Na胶束化过程的影响随着温度的升高由熵驱动逐渐转化为焓驱动，这种转化过程随着NaCl浓度的升高越来越提前。掌握温度和NaCl浓度的耦合作用对C₁₂H₂₅SO₄Na理化性质的影响，以期为进一步研究其热力学行为奠定基础。

关键词: 氯化钠, 十二烷基硫酸钠, 热力学参数, 温度, 驱动

CLC Number:

JIA Qifeng, NI Xiaoming, WU Haiming, LI Zhiheng. Physical and chemical parameters and thermodynamic behavior of sodium dodecyl sulfate in different concentrations of NaCl[J]. Chemical Industry and Engineering Progress, 2018, 37(S1): 181-186.

贾奇锋, 倪小明, 吴海明, 李志恒. 不同NaCl浓度下十二烷基硫酸钠的理化参数和热力学行为[J]. 化工进展, 2018, 37(S1): 181-186.

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Physical and chemical parameters and thermodynamic behavior of sodium dodecyl sulfate in different concentrations of NaCl

不同NaCl浓度下十二烷基硫酸钠的理化参数和热力学行为

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