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Poly(Ionic Liquid) Semi-Interpenetrating Network Multi-Responsive Hydrogels

Authors: 

Alexandru Tudor, Larisa Florea, Simon Gallagher, John Burns, Dermot Diamond

Publication Type: 
Refereed Original Article
Abstract: 
Herein we describe poly(ionic liquid) hydrogel actuators that are capable of responding to multiple stimuli, namely temperature, ionic strength and white light irradiation. Using two starting materials, a crosslinked poly ionic liquid (PIL) and a linear poly(N-isopropylacrylamide-co-spiropyran-co-acrylic acid), several semi-interpenetrating (sIPN) hydrogels were synthesised. The dimensions of hydrogels discs were measured before and after applying the stimuli, to quantify their response. Samples composed of 100% crosslinked PIL alone showed an average area reduction value of ~53% when the temperature was raised from 20 °C to 70 °C, ~24% when immersed in 1% w/w NaF salt solution and no observable photo-response. In comparison, sIPNs containing 300% w/w linear polymer showed an average area reduction of ~45% when the temperature was raised from 20 °C to 70 °C, ~36% when immersed in 1% NaF w/w salt solution and ~10% after 30 min exposure to white light irradiation, respectively. Moreover, by varying the content of the linear component, fine-control over the photo-, thermo- and salt response, swelling-deswelling rate and mechanical properties of the resulting sIPN was achieved. http://doras.dcu.ie/21096/
Digital Object Identifer (DOI): 
10.3390/s16020219
Publication Status: 
Published
Date Accepted for Publication: 
Tuesday, 2 February, 2016
Publication Date: 
06/02/2016
Journal: 
Sensors
Volume: 
16
Issue: 
2
Pages: 
E219
Research Group: 
Institution: 
Dublin City University (DCU)
Open access repository: 
Yes