Grafting of poly(lauryl acrylate) onto nano-silica by ‘click chemistry-

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• 作者：Kailing Chen (1)
  Yunhui Zhao (1)
  Xiaoyan Yuan (1)
  
• 关键词：‘Click chemistry-/li> Grafting ; Poly(lauryl acrylate) ; Nano ; silica ; Dispersibility
• 刊名：Chemical Research in Chinese Universities
• 出版年：2014
• 出版时间：April 2014
• 年：2014
• 卷：30
• 期：2
• 页码：339-342
• 全文大小：626 KB
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• 作者单位：Kailing Chen (1)
  Yunhui Zhao (1)
  Xiaoyan Yuan (1)
  
  1. Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
  
• ISSN：2210-3171

文摘

Poly(n-alkyl acrylate) with long side groups, namely, poly(lauryl acrylate)(PLA) was synthesized by reversible addition-fragmentation chain transfer(RAFT) polymerization, and the trithioester terminal groups were converted to thiol by reducing reaction. Grafting of the obtained polymer onto nano-silica modified with 3-(methacryloxy)propyl-trimethoxysilane(SiO2-MPS) was conducted by thiol-ene ‘click chemistry- PLA was characterized by proton nuclear magnetic resonance(1H NMR) and gel permeation chromatography(GPC). Fourier transform infrared(FTIR) spectrometry and thermogravimetric analysis(TGA) were used to demonstrate the grafting reaction, and the grafted hairy nano-silica(SiO2-g-PLA) was viewed under a transmission electron microscope(TEM). According to TGA, grafting ratio and grafting density of SiO2-g-PLA are 30.27% and 0.013 chain/nm2, respectively. The static water contact angle of SiO2-g-PLA is (80.10±2.97)°, which ensures its hydrophobicity. Dispersion experiment was carried out to confirm its dispersibility in mixed solvents, indicating its potential application in coatings or composites.