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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (17): 2047-2052. 上一篇    下一篇

研究论文

紫外光引发Pickering乳液聚合制备中空复合微球的研究

张卫红，范晓东*，田威*，范伟伟，程广文   

  1. (西北工业大学理学院应用化学系 西安 710072)
  • 投稿日期:2010-12-21 修回日期:2011-03-21 发布日期:2011-05-10
  • 通讯作者: 张卫红 E-mail:zwh10430@sina.com
  • 基金资助:

    超支化核壳型高分子设计及双客体选择性包载和顺序释放机理

Synthesis of Hollow Microspheres by Pickering Emulsion Polymerization Initiated by Ultraviolet Light

ZHANG Wei-Hong, FAN Xiao-Dong, TIAN Wei, FAN Wei-Wei, CHENG Guang-Wen   

  1. (Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xian 710072)
  • Received:2010-12-21 Revised:2011-03-21 Published:2011-05-10
  • Contact: Wei-Hong ZHANG E-mail:zwh10430@sina.com

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1475

被引次数

27 | 5

用光引发剂2-羟基-4-(2-羟乙氧基)-2-甲基苯丙酮(IHT-PI 659)对纳米SiO2表面进行接枝使之兼具两亲性及光引发特性|以该功能性纳米SiO2为稳定剂构筑O/W(水包油)型Pickering乳液|用紫外光引发处于内油相的甲基丙烯酸甲酯单体聚合, 制备出具有中空结构的SiO2/PMMA复合微球, 采用傅里叶变换红外光谱(FTIR)、热失重分析仪(TGA)、透射电镜(TEM)及扫描电子显微镜(SEM)对复合微球进行了表征, 并提出了紫外光引发Pickering乳液聚合制备中空复合微球的机理.

关键词: 紫外光引发, Pickering乳液聚合, 中空复合微球

Hollow composite microspheres can be prepared rapidly by Pickering emulsion polymerization initiated by ultraviolet light. Firstly, nano-SiO2 were endowed with amphipathy and photosensitivity by grafting with 2-hydroxy-4-(2-hydroxyethoxy)-2-methyl-propiophenone (IHT-PI 659). Secondly, stable Pickering emulsion was fabricated by using this functional nano-SiO2 particles as stabilizer. Finally, the SiO2/polymethylmethacrylate composite microspheres with hollow structure were successfully synthesized by Pickering emulsion polymerization initiated by ultraviolet light at room temperature. The products were characterized by Fourier transformation infrared spectrum (FTIR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and scanning electron microscope (SEM). A possible mechanism for the formation of the hollow composites by photo-initiation Pickering emulsion polymerization was also proposed.

Key words: UV initiation, Pickering emulsion polymerization, hollow composite microspheres

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