In  situ grafting silica nanoparticles reinforced nanocomposite hydrogels

Jun Yang; Chun-Rui Han; Jiu-Fang Duan; Feng Xu; Run-Cang Sun

doi:10.1039/C3NR04252A

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Insitu grafting silica nanoparticles reinforced nanocomposite hydrogels†

Jun Yang,*^a Chun-Rui Han,^a Jiu-Fang Duan,^a Feng Xu^a and Run-Cang Sun^a

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* Corresponding authors

^a College of Materials Science and Technology, Beijing Forestry University, Beijing, China
E-mail: yangjun11@bjfu.edu.cn

Abstract

Highly flexible nanocomposite hydrogels were prepared by using silica nanoparticles (SNPs) as fillers and multi-functional cross-links to graft hydrophilic poly(acrylic acid) (PAA) by free radical polymerization from an aqueous solution. The SNPs were collected by neighboring polymer chains and dispersed uniformly within a PAA matrix. The mechanical properties of the nanocomposite hydrogels were tailored by the concentration of SNPs according to the percolation model. It was proposed that covalent bonds of adsorbed chains on the filler surface resulted in the formation of a shell of an immobilized glassy layer and trapped entanglements, where the glassy polymer layer greatly enhanced the elastic modulus and the release of trapped entanglements at deformation contributed to the viscoelastic properties.

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Article information

DOI: https://doi.org/10.1039/C3NR04252A
Article type: Communication
Submitted: 12 Aug 2013
Accepted: 06 Sep 2013
First published: 13 Sep 2013

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Nanoscale, 2013,5, 10858-10863

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In situ grafting silica nanoparticles reinforced nanocomposite hydrogels

J. Yang, C. Han, J. Duan, F. Xu and R. Sun, Nanoscale, 2013, 5, 10858 DOI: 10.1039/C3NR04252A

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