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| NaSal/2SHNC对R14HTAB体系自组装行为的影响机制 |
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孙浩玉1,张琰2,高阳3,李嘉伟2,张英男2,燕友果2,张军2
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(1.中国石化胜利石油工程有限公司钻井工艺研究院,山东东营 257000;2.中国石油大学(华东)材料科学与工程学院,山东青岛266580;3.中国石油新疆油田公司勘探开发研究院,新疆克拉玛依 834000)
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| 摘要: |
| 采用粗粒化分子动力学(CGMD)模拟方法研究水杨酸钠(NaSal)和2-羟基萘-3-羧酸酯(2SHNC)两种有机盐对阳离子表面活性剂3-烷氧基-2-羟丙基三甲基卤化铵(R14HTAB)自组装过程及组装体性能的影响。结果表明:球型胶束的形成经历成核、团簇融合2个阶段;蠕虫状胶束的形成经历成核、团簇融合和胶束融合3个阶段;囊泡形成经历成核、团簇融合、胶束融合、盘状胶束和盘状胶束卷曲5个阶段;与NaSal相比,2SHNC在低浓度下即能促进胶束融合自组装形成蠕虫状胶束,且能促进复杂胶束囊泡的形成,表现出更强的促进胶束融合能力;2SHNC形成的蠕虫状胶束体系在非轴向拉伸过程中表现出更强的抗拉强度,2SHNC/R14HTAB体系形成的蠕虫状胶束更长,得到的体系黏弹性更好。 |
| 关键词: 有机盐类型 阳离子表面活性剂 自组装 黏弹性 |
| DOI：10.3969/j.issn.1673-5005.2019.06.021 |
| 分类号::TE 39 |
| 文献标识码:A |
| 基金项目:国家重大专项子课题(2016ZX05022006)；中央高校基本科研业务费专项(19CX05001A) |
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| Effecting mechanism of organic salts NaSal/2SHNC on self-assembly of cationic surfactant R14HTAB |
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SUN Haoyu1, ZHANG Yan2, GAO Yang3, LI Jiawei2, ZHANG Yingnan2, YAN Youguo2, ZHANG Jun2
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(1.Drilling Technology Research Institute of Shengli Petroleum Engineering Company Limited,SINOPEC, Dongying 257000, China;2.School of Materials Science and Engineering in China University of Petroleum(East China), Qingdao 266580, China;3.Research Institute of Exploration and Development, Xinjiang Oilfield Company, Karamay 834000, China)
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| Abstract: |
| The self-assembly process and the mechanical property of 3-alkoxy-2-hydroxypropyltrimethylammonium halide(R14HTAB) modulated by two kinds of organic salts of sodium salicylate (NaSal) and 2-hydroxynaphthalene-3-carboxylate (2SHNC) were investigated through the coarse-grained molecular dynamics (CGMD) simulation.The results show that the formation of spherical micelles undergoes two stages:nucleation and cluster fusion. The formation of worm-like micelles includes three stages:nucleation, cluster fusion and micelle fusion.And the vesicle formation has five stages:nucleation, cluster fusion, micelle fusion, disc-shaped micelles and disc-shaped micelle coiling. Compared with NaSal, 2SHNC presents stronger ability to promote micelle fusion, which can be confirmed by two facts:the first is that the work-like micelle could be obtained at lower 2SHNC concentration; the second is that the 2SHNC could promote to form more complex micelle of vesicle. Furthermore, the work-like micelle promoted by the 2SHNC exhibits stronger tensile strength tested by non-axial stretching, meaning that the 2SHNC could induce to form longer worm-like micelle and possesses better viscoelastic. |
| Key words: organic salt type cationic surfactant self-assembly viscoelasticity |
