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Semi-interpenetrating network photo-responsive hydrogels containing poly(ionic liquid)s

Tudor, Alexandru and Florea, Larisa and Gallagher, Simon and Diamond, Dermot (2015) Semi-interpenetrating network photo-responsive hydrogels containing poly(ionic liquid)s. In: 1st Brazil-Ireland Science Week, 23-26 Feb 2015, Dublin, Ireland.

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Abstract

Poly(ionic liquid)s are a subclass of ionic liquids that feature polymerizable groups in either the anion, the cation or both. They are used as building blocks for a wide range of materials which can be used for a broad spectrum of applications, including conducting materials in solar cells, lithium rechargeable batteries, actuators and other electrochemical devices [1]. Poly(N-isopropylacrylamide) (pNiPAAm) is known to exhibit a lower critical solution temperature (LCST) in an aqueous medium [2]. By incorporating other co-monomers in the pNiPAAm network, such as spiropyran (SPA) photochromic units, materials which are both thermo- and photo-responsive can be synthesized [3]. By crosslinking a poly(ionic liquid), such as tributylhexylphosphonium 3-sulfopropylacrylate (PSPA), in the presence of linear poly(N-isopropylacrylamide-co-spiropyran-co-acrylic acid) (pNiPAAm-SPA-AA) copolymer, a semi-interpenetrating network (sIPN) was synthesized. The following research focuses on the synthesis and characterization of linear (pNiPAAm-SPA-AA) and its incorporation in a sIPN. A series of sIPN hydrogels have been synthesized, each having a different concentration of the (pNiPAAm-SPA-AA) linear copolymer, and their photo-response was analyzed in deionized water and in a series of NaCl solutions (0.5 wt%, 1 wt% and 5 wt%). For the sIPNs containing 100%, 200%, 300% and 400% w/w linear copolymer, the total area contraction after 30 min white light irradiation in deionized water was ≈3%, ≈6%, ≈10% and ≈13%. In conclusion, a linear p(NiPAAm-SPA-AA) copolymer was synthesized and incorporated in a crosslinked PSPA matrix to create photo-responsive sIPNs with finely tuned photo-actuation properties. References: [1] J. Yuan, D. Mecerreyes, M. Antonietti, Prog. Polym. Sci., 2013, 38, 1009-1036. [2] C. Boutris, E. G. Chatzi, C. Kiparissides, Polymer, 38 (1997) 2567-2570. [3] K. Sumaru, M. Kameda, T. Kanamori, T. Shinbo, Macromolecules, 37 (2004) 4949-4955.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:No
Uncontrolled Keywords:Polymers; Ionic liquids; Poly(ionic-liquid)s; Smart materials; Photo-responsive materials Thermo-responsive materials; Ionic strength responsive materials; Hydrogels
Subjects:Physical Sciences > Inorganic chemistry
Physical Sciences > Organic chemistry
Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > INSIGHT Centre for Data Analytics
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:20501
Deposited On:25 Mar 2015 11:02 by Alexandru Tudor. Last Modified 01 Jun 2015 01:02

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