Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (18): 1855-1863. Previous Articles     Next Articles

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  1. (应用表面与胶体化学教育部重点实验室 陕西师范大学化学与材料科学学院 西安 710062)
  • 投稿日期:2009-05-12 修回日期:2009-04-15 发布日期:2010-05-19
  • 通讯作者: 张颖
  • 基金资助:


Synthesis and Characterization of Fluorescent Composite Microgels with the Dual Thermo- and pH-sensitive

HU Wei, ZHANG Ying   

  1. (Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi an 710062)
  • Received:2009-05-12 Revised:2009-04-15 Published:2010-05-19
  • Contact: Ying ZHANG

N-Isopropylacrylamide (NIPAM) and methacrylic acid (MAA) copolymer microgels were prepared by the inverse suspension polymerization technique. Using P(NIPAM-co-MAA) copolymer microgels as the template, amino modified P(NIPAM-co-MAA)/SiO2 polymer/inorganic composite microgels were prepared by the hydrolysis and condensation of (3-aminopropyl)-triethoxysilane (APTES) under alkaline condition. Finally, dual thermo- and pH-sensitive fluorescent composite microgels with core-shell structures were obtained via the reaction between the fluorescein isothiocyanate (FITC) and amino group. The structures and properties of the prepared composite microgels were characterized by the scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), polarized optical microscopy (POM) with hot stage and laser scanning confocal microscope (CLSM). The results were demonstrated that the composite microgels exhibited good sensitivities both to the temperature and pH, as well as emitted fluorescence in visible light range.

Key words: polymer microgels, temperature-sensitive, pH-sensitive, fluorescent