Poly(Ionic Liquid) Semi-Interpenetrating Network Multi-Responsive Hydrogels
AbstractHerein 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. View Full-Text
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Tudor, A.; Florea, L.; Gallagher, S.; Burns, J.; Diamond, D. Poly(Ionic Liquid) Semi-Interpenetrating Network Multi-Responsive Hydrogels. Sensors 2016, 16, 219.
Tudor A, Florea L, Gallagher S, Burns J, Diamond D. Poly(Ionic Liquid) Semi-Interpenetrating Network Multi-Responsive Hydrogels. Sensors. 2016; 16(2):219.Chicago/Turabian Style
Tudor, Alexandru; Florea, Larisa; Gallagher, Simon; Burns, John; Diamond, Dermot. 2016. "Poly(Ionic Liquid) Semi-Interpenetrating Network Multi-Responsive Hydrogels." Sensors 16, no. 2: 219.
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