Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (08): 1129-1135.DOI: 10.6023/A13030253 Previous Articles     Next Articles

Article

C12EO4与氨丙基三乙氧基硅烷水溶液自组装和流变性研究

郭红, 王栋, 董姝丽, 窦盈莹, 宋爱新, 郝京诚   

  1. 山东大学胶体与界面化学教育部重点实验室 济南 250100
  • 收稿日期:2013-03-07 出版日期:2013-08-14 发布日期:2013-05-16
  • 通讯作者: 郝京诚, E-mail: jhao@sdu.edu.cn; Tel.: 0531-88366074; Fax: 0531-88564750 E-mail:jhao@sdu.edu.cn
  • 基金资助:

    项目受国家自然科学基金(Nos. 21033005, 21273136)和国家重大研究计划(973计划, No. 2009CB930103)资助.

Self-assembly and Rheological Properties of C12EO4 and Aminosilane Mixtures

Guo Hong, Wang Dong, Dong Shuli, Dou Yingying, Song Aixin, Hao Jingcheng   

  1. Key Laboratory for Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100
  • Received:2013-03-07 Online:2013-08-14 Published:2013-05-16
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 21033005, 21273136) and the National Basic Research Program of China (973 Program, No. 2009CB930103).

Phase behavior, self-assembly, and rheological properties of 3-aminopropyltriethoxysilane (APTES) and nonionic surfactant, CH3(CH2)11(OCH2CH2)4OH (C12EO4), in water were studied. The self-assembled structures were determined by means of small angle X-ray scattering (SAXS), cryo-transmission electron microscopy (cryo-TEM), freeze-fracture TEM (FF-TEM), and 2H nuclear magnetic resonance (2H NMR) measurements and the properties of self-assembled mixtures were obtained by rheological measurements. With a variation of the composition, different self-assembled structures were obtained. In the Lα phase region, a phase structural transition from an aggregate with high curvatures to the lamellar structures with low curvatures is observed with an increase of APTES concentration at a constant concentration of C12EO4. At constant APTES concentration, with an increase of C12EO4 concentration, densely packed vesicles and planarly lamellar structures which behave the properties as gel-like solutions having the rather high viscosity coexist. The phase structural transition was considered to be induced by the insertion of the hydrolytic products of APTES into the palisade of the micelles of C12EO4. These new observations on phase structural transition and self-assembly of nonionic surfactant and aminosilane mixtures could be very important for the full understanding for their applications, especially as templates in the synthesis of silica materials, etc.

Key words: phase behavior, nonionic surfactant, aminosilane, rheological property, cryo-TEM