化学学报 ›› 2013, Vol. 71 ›› Issue (08): 1129-1135.DOI: 10.6023/A13030253 上一篇    下一篇

研究论文

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).

研究了3-氨丙基三乙氧基硅烷(APTES)和非离子表面活性剂十二烷基聚氧乙烯(C12EO4)水溶液的相行为、溶液自聚集作用和流变性, 小角度X-射线散射(SAXS)、低温透射电子显微镜(cryo-TEM)和氘谱核磁共振(2H NMR)测定确定了溶液中聚集体结构, 测定了聚集体混合物溶液的流变性质. 结果表明: 随着溶液混合物组分的变化, 溶液聚集体结构发生了改变, 在Lα相区内, 恒定C12EO4浓度, 随着APTES浓度增加聚集体结构由高曲率聚集体转变为低曲率的层状结构; 而在恒定APTES浓度时, 随着C12EO4增加, Lα相由低粘弹性的囊泡溶液转变为粘弹性极高的密堆积囊泡和平面层状结构共存的类凝胶相, 溶液聚集体结构和结构转变是由于APTES水解产物插入至C12EO4胶束引起的. 非离子表面活性剂和氨基硅烷混合物溶液相结构及结构转变的新结果对于完全理解该类混合物的实际应用, 特别是作为模板合成硅材料的应用具有重要理论意义.

关键词: 相行为, 非离子表面活性剂, 氨基硅氧烷, 流变性, cryo-TEM

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