文章摘要
王嘉欣,唐善法.阴离子双子表面活性剂分子结构对其溶液黏度影响及机理[J].精细化工,2018,35(4):0
阴离子双子表面活性剂分子结构对其溶液黏度影响及机理
Effect of Molecular Structure of Anionic Gemini Surfactant on Solution Viscosity and Its Mechanism
投稿时间:2017-07-02  修订日期:2017-08-31
DOI:
中文关键词: 阴离子双子表面活性剂  分子结构  黏度  胶束结构  机理  高温
英文关键词: anionic gemini surfactant  molecular structure  viscosity  micellar structure  mechanism  high temperature
基金项目:国家自然科学基金(51474035)资助项目
作者单位E-mail
王嘉欣 长江大学石油工程学院 81075897@qq.com 
唐善法 长江大学石油工程学院 tangsf2005@126.com 
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中文摘要:
      为优选耐高温清洁压裂液增黏剂,用流变仪考察了分子结构、温度变化对阴离子双子表面活性剂溶液黏度的影响,并用扫描电镜研究了其溶液微观结构变化,探讨了其对溶液黏度的影响机理。结果表明,间隔基团碳数s=2,疏水链碳数m=12或14时,亲水头基类型对其双子表面活性剂溶液黏度影响呈现相同规律(羧酸盐>磺酸盐>硫酸酯盐);间隔基团碳数s=2时,疏水链碳数增加,羧酸盐双子表面活性剂溶液黏度增大,磺酸盐双子表面活性剂溶液黏度呈波动上升;疏水链碳数相同时,间隔基团碳数增加,磺酸盐双子表面活性剂溶液黏度先增大后减小,羧酸盐双子表面活性剂溶液则黏度减小,其中DS18-3-18和DC16-2-16增黏效果好;温度升高,DS18-3-18和DC16-2-16溶液黏度下降,但90℃时DS18-3-18溶液黏度(13.25mPa.s)大于DC16-2-16。微观结构研究表明,间隔基团碳数增大(s=2、3、4),DS18-s-18溶液胶束结构依次由球状变为片状直至球状,导致溶液黏度先增后降。温度升高,DS18-3-18溶液中片状胶束数目或堆积密度呈下降趋势,至90℃时,溶液中仍有联结完好的片状胶束存在,因此DS18-3-18具有较好的耐温增黏性。
英文摘要:
      The effect of molecular structure and temperature change on the viscosity of anionic gemini surfactant solution was investigated by rheometer. The microstructure of the solution was studied by scanning electron microscopy . On the mechanism of solution viscosity,the results show that the influence of the hydrophilic head type on the viscosity of the gemini surfactant solution show the same pattern (the carboxylate salt>sulfonate>sulfuric acid) .The number of carbon atoms in the interval group is2 and the number of carbon atoms in the hydrophobic chain increased;the viscosity of the carboxylate gemini surfactant solution and sulfonate gemini surfactant solution increased simulataneously . At the same time, the number of carbon atoms in the interval group increased, while the viscosity of the sulfonate gemini surfactant solution increased firstly and then decreased, and the viscosity of the carboxylate gemini surfactant solution decreased, Which DS18-3-18 and DC16-2-16 thickening effect is better. With the temperature increases,the viscosity of DS18-3-18 and DC16-2-16 solution decreased, but the viscosity of DS18-3-18 solution (13.25mPa.s) was still higher than that of DC16-2-16 at 90 ℃. Microstructures show that the number of carbon atoms in the interval group increases (s = 2, 3, 4), and the micelles of DS18-s-18 solution are changed from spherical to flaky to spherical. The number of lamellar micelles or bulk density in the DS18-3-18 solution decreases and there is still a well-connected sheet micelle in the solution and at 90 ℃.So the DS18-3-18 has better temperature and viscosity.
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