Issue 48, 2014
From the journal:

RSC Advances

Remote control of volume phase transition of hydrogels containing graphene oxide by visible light irradiation

Dowan Kim,a   Heon Sang Leeb  and  Jinhwan Yoon*a  

* Corresponding authors

a Department of Chemistry, Dong-A University, Republic of Korea
E-mail: jyoon@dau.ac.kr
Tel: +82 (51) 200-7245

b Department of Chemical Engineering, Dong-A University, Republic of Korea

Abstract

Poly(N-isopropylacrylamide-co-sodium acrylate) and graphene oxide (GO) composites were prepared by a simple mixing of a solution containing the monomers and aqueous GO through chemically initiated polymerization. We found that exfoliated GO sheets were well-dispersed in the hydrogel matrix and absorbed visible light and consequently generated heat. By combining the photothermal GO with the thermally responsive hydrogel matrix, we demonstrated a volume change of the hydrogel triggered by visible light irradiation of modest intensity. The volume phase transition of the composite hydrogel was fully reversible and could be repeated multiple times without any significant variation. Furthermore, the degree of volume change could be controlled by the light intensity and exposure time as well as the concentration of GO in the hydrogel.

Graphical abstract: Remote control of volume phase transition of hydrogels containing graphene oxide by visible light irradiation

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Article information

DOI
https://doi.org/10.1039/C4RA01537A
Article type
Paper
Submitted
21 Feb 2014
Accepted
22 May 2014
First published
29 May 2014

RSC Adv., 2014,4, 25379-25383

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Remote control of volume phase transition of hydrogels containing graphene oxide by visible light irradiation

D. Kim, H. S. Lee and J. Yoon, RSC Adv., 2014, 4, 25379 DOI: 10.1039/C4RA01537A

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