物理化学学报 >> 2013, Vol. 29 >> Issue (01): 131-138.doi: 10.3866/PKU.WHXB201210082

软物质 上一篇    下一篇

新型双链表面活性剂DDOBA的合成与高单分散性憎水纳米金的制备

韩莹, 朱露, 沈明, 李恒恒   

  1. 扬州大学化学化工学院, 江苏 扬州 225002
  • 收稿日期:2012-08-14 修回日期:2012-10-08 发布日期:2012-12-14
  • 通讯作者: 沈明 E-mail:shenming@yzu.edu.cn
  • 基金资助:

    国家自然科学基金(21172190, 21273194)和江苏高校优势学科建设工程资助项目

Synthesis of a Novel Surfactant with Two Alkyl Tail-Chains (DDOBA) and Fabrication of Hydrophobic Gold Nanoparticles with High Monodispersity

HAN Ying, ZHU Lu, SHEN Ming, LI Heng-Heng   

  1. College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
  • Received:2012-08-14 Revised:2012-10-08 Published:2012-12-14
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21172190, 21273194) and funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘要:

自行设计合成了新颖的苄胺型双链表面活性剂3,4-双十二烷氧基苄胺(DDOBA). 利用DDOBA/正丁醇/正庚烷/甲酸/HAuCl4·4H2O自发形成的水/油(W/O)型微乳液作为微反应器, 通过微波辐射下的甲酸还原法成功制备了DDOBA保护的憎水性金纳米粒子, 并通过紫外-可见(UV-Vis)光谱、透射电镜(TEM)、高分辨透射电镜(HR-TEM)和X射线衍射(XRD)等方法进行了表征和分析. 结果显示, DDOBA既可参与形成稳定的W/O型(油包水型)微乳液, 又可作为金纳米粒子的良好保护剂. 在合适的微乳液体系组成范围内, 用本实验方法可以获得高单分散性的憎水性金纳米粒子, 并能在空气/水界面上自动形成大面积短程有序的纳米金二维自组装膜.

关键词: 3,4-双十二烷氧基苄胺, 表面活性剂, W/O型微乳液, 憎水性金纳米粒子, 甲酸, 微波辐射

Abstract:

3,4-Didodecyloxybenzylamine (DDOBA), a novel surfactant with two alkyl tail chains, was designed and synthesized. DDOBA-capped hydrophobic gold nanoparticles were successfully fabricated using formic acid as a reducing agent in a DDOBA/n-butanol/n-heptane/formic acid/HAuCl4·4H2O water/oil (W/O) microemulsion system under microwave irradiation. DDOBA-stabilized gold nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), and X-ray diffraction (XRD). The experimental results showed that DDOBA not only participated in the formation of a stable W/O microemulsion system, but also became a good protecting agent for gold nanoparticles. Within an appropriate concentration range of components in the W/O microemulsion system, hydrophobic gold nanoparticles with high monodispersity can be obtained using this experimental method and automatically form large areas of ordered monolayer built with DDOBA-capped gold nanoparticles at the air/water interface.

Key words: 3,4-Didodecyloxybenzylamine, Surfactant, W/O microemulsion, Hydrophobic gold nanoparticle, Formic acid, Microwave irradiation

MSC2000: 

  • O648