CIESC Journal ›› 2010, Vol. 18 ›› Issue (1): 156-163.

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Preparation of Organic/Inorganic Hybrid Polymer Emulsions with High Silicon Content and Sol-gel-derived Thin Films

廖文波, 瞿金清, 李忠, 陈焕钦   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2009-06-03 修回日期:2009-08-09 出版日期:2010-02-28 发布日期:2010-12-30
  • 通讯作者: QU Jinqing,E-mail: cejqqu@scut.edu.cn
  • 作者简介:
  • 基金资助:
    Supported by the Program for New Century Excellent Talents in University(NCET-08-0204);National Natural Science Foundation of China(20976060);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Edu-cation Ministry (China)

Preparation of Organic/Inorganic Hybrid Polymer Emulsions with High Silicon Content and Sol-gel-derived Thin Films

LIAO Wenbo, QU Jinqing, LI Zhong, CHEN Huanqin   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2009-06-03 Revised:2009-08-09 Online:2010-02-28 Published:2010-12-30
  • Supported by:
    Supported by the Program for New Century Excellent Talents in University(NCET-08-0204);National Natural Science Foundation of China(20976060);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Edu-cation Ministry (China)

摘要: A novel polymer/SiO2 hybrid emulsion(PAES) was prepared by directly mixing colloidal silica with polyacrylate emulsion(PAE)modified by a saline coupling agent.The sol-gel-derived thin films were obtained by addition of co-solvents into the PAES.The effects of γ-methacryloxypropy ltrimethoxysilane(KH-570) content and co-solvent on the properties of PAES films were investigated.Dynamic laser scattering(DLS) data indicate that the average diameter of PAES(96 nm) is slightly larger than that of PAE(89 nm).Transmission electron microscopy (TEM) photo discloses that colloidal silica particles are dispersed uniformly around polyacrylate particles and some of the colloidal silica particles are adsorbed on the surface of PAE particles.The crosslinking degree data and Fourier transform infrared(FT-IR)spectra confirm that the chemical structure of the PAES is changed to form Si-O-Si-polymer crosslinking networks during the film formation.Atomic force microscope(AFM) photos show the solvent induced sol-gel process of colloidal silica and the Si-based polymer distribution on the film surface of the dried PAES.Thermogravimetric analysis(TGA) curves demonstrate that the PAES films display much better thermal stability than PAE.

关键词: colloidal silica, polymer/SiO2 hybrid emulsions, sol-gel process, water resistance

Abstract: A novel polymer/SiO2 hybrid emulsion(PAES) was prepared by directly mixing colloidal silica with polyacrylate emulsion(PAE)modified by a saline coupling agent.The sol-gel-derived thin films were obtained by addition of co-solvents into the PAES.The effects of γ-methacryloxypropy ltrimethoxysilane(KH-570) content and co-solvent on the properties of PAES films were investigated.Dynamic laser scattering(DLS) data indicate that the average diameter of PAES(96 nm) is slightly larger than that of PAE(89 nm).Transmission electron microscopy (TEM) photo discloses that colloidal silica particles are dispersed uniformly around polyacrylate particles and some of the colloidal silica particles are adsorbed on the surface of PAE particles.The crosslinking degree data and Fourier transform infrared(FT-IR)spectra confirm that the chemical structure of the PAES is changed to form Si-O-Si-polymer crosslinking networks during the film formation.Atomic force microscope(AFM) photos show the solvent induced sol-gel process of colloidal silica and the Si-based polymer distribution on the film surface of the dried PAES.Thermogravimetric analysis(TGA) curves demonstrate that the PAES films display much better thermal stability than PAE.

Key words: colloidal silica, polymer/SiO2 hybrid emulsions, sol-gel process, water resistance