title: Highly Swellable, Dual-Responsive Hydrogels Based on PNIPAM and Redox Active Poly(ferrocenylsilane) Poly(ionic liquid)s: Synthesis, Structure, and Properties.
abstract: Highly swellable, dual-responsive hydrogels, consisting of thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) and redox-responsive poly(ferrocenylsilane) (PFS) based poly(ionic liquid)s (PILs) are formed by photo-polymerization. PFS chains bearing cross-linkable vinylimidazolium (VIm) side groups are copolymerized with NIPAM in aqueous solutions under ultraviolet light (λ = 365 nm) in the presence of a photoinitiator. The PFS-PILs serve as a macro-cross-linker and also provide redox responsiveness. The swelling ratio, morphology, and lower critical solution temperature (LCST) of the hydrogels are studied as a function of the PNIPAM/PFS ratio. The value of the LCST is dependent on the choice of the counterion of the PIL and the PNIPAM/PFS ratio. The hydrogel is employed as a reducing environment for the in situ fabrication of gold nanoparticles (AuNPs), forming AuNP-hydrogel composites. The localized surface plasmon resonance peak of the as-synthesized Au nanoparticles inside the hydrogel could be tuned by altering the temperature.
authors: Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands.|Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore.
authors: Xueling
authors: X
authors: Feng
authors: Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands.
authors: Kaihuan
authors: K
authors: Zhang
authors: Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore.
authors: Peng
authors: P
authors: Chen
authors: Key Laboratory of Science and Technology of Eco-Textile (Ministry of Education), Donghua University, Shanghai, 201620, P. R. China.
authors: Xiaofeng
authors: X
authors: Sui
authors: Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands.
authors: Mark A
authors: MA
authors: Hempenius
authors: Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore.
authors: Bo
authors: B
authors: Liedberg
authors: Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands.
authors: G Julius
authors: GJ
authors: Vancso
mesh_terms: D000180:Acrylic Resins / Q000138:chemical synthesis / Q000737:chemistry*; D005296:Ferrous Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D020100:Hydrogels / Q000737:chemistry*; D052578:Ionic Liquids / Q000138:chemical synthesis / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry; D015394:Molecular Structure; D010084:Oxidation-Reduction; D012821:Silanes / Q000138:chemical synthesis / Q000737:chemistry*; D020349:Surface Plasmon Resonance; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D005296:Ferrous Compounds; D020100:Hydrogels; D052578:Ionic Liquids; D012821:Silanes; C554070:poly(ferrocenylsilane); C052970:poly-N-isopropylacrylamide; D006046:Gold
keywords: hydrogels; nanoparticles; poly(ferrocenylsilane)s; poly(ionic liquid)s; stimuli-responsive polymers