Grafting of Poly(lauryl acrylate) onto Nano-silica by ‘Click Chemistry’

doi:10.1007/s40242-013-3274-5

Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (2): 339-342.doi: 10.1007/s40242-013-3274-5

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Grafting of Poly(lauryl acrylate) onto Nano-silica by ‘Click Chemistry’

CHEN Kailing, ZHAO Yunhui, YUAN Xiaoyan

Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China

Received:2013-06-28 Revised:2013-08-19 Online:2014-04-01 Published:2013-08-30
Contact: ZHAO Yunhui E-mail:zhaoyunhui@tju.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.51273146 and 51103061).

Abstract

Abstract:

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.

Key words: ‘Click chemistry’, Grafting, Poly(lauryl acrylate), Nano-silica, Dispersibility

CHEN Kailing, ZHAO Yunhui, YUAN Xiaoyan. Grafting of Poly(lauryl acrylate) onto Nano-silica by ‘Click Chemistry’[J]. Chemical Research in Chinese Universities, 2014, 30(2): 339-342.

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Grafting of Poly(lauryl acrylate) onto Nano-silica by ‘Click Chemistry’

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