Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Influence of Reaction Conditions on the Grafting Pattern of 3-Glycidoxypropyl trimethoxysilane on Montmorillonite

  • He, Wentao (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Yao, Yong (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • He, Min (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Kai, Zhang (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Long, Lijuan (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Zhang, Minmin (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Qin, Shuhao (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University) ;
  • Yu, Jie (National Engineering Research Center for Compounding and Modification of Polymeric Materials, and College of Materials Science and Metallurgy Engineering, GuiZhou University)
  • Received : 2012.09.18
  • Accepted : 2012.10.12
  • Published : 2013.01.20
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Abstract

Surface modification of montmorillonite (MMT) with 3-glycidoxypropyl trimethoxysilane (3GTO) in mild methanol/water mixture has been investigated in detail. The influence of reaction conditions (including silane concentration in feed, reaction time and reaction temperature) on the grafting amount and yield of silane, and further on the grafting pattern of silanes was studied by thermogravimetric analysis, elemental analysis, X-ray diffraction (XRD) and BET. Higher silane concentration, longer reaction time and higher reaction temperature are all benefit to higher grafting amount. When the grafting reaction was performed with 3 mmol/g silane concentration, at $90^{\circ}C$ for 24 h, the grafted amount and yield of silane reached 1.4443 mmol/g and 30%, respectively. Based on the XRD and BET data analysis, a speculation that the grafting pattern of silanes was concentration dependence was proposed.

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