2018
DOI: 10.1039/c8sm00504d
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Facile fabrication of thermo/redox responsive hydrogels based on a dual crosslinked matrix for a smart on–off switch

Abstract: Stimuli-responsive or "smart" soft materials have raised considerable attention due to their ability to spontaneously respond to external environmental variations and have a great potential for wide applications. Herein, a thermo/redox responsive hydrogel is facilely constructed based on a dual crosslinked matrix: the primary chemical crosslinked copolymer is composed of thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) and poly(ionic liquid), and the secondary physical crosslinking component is generated… Show more

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Cited by 24 publications
(21 citation statements)
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“…Several natural polymers that demonstrate thermally sensitive properties have been used for the synthesis of hydrogels such as polysaccharides (cellulose, chitosan and xiloglucan) [ 123 , 124 , 125 ] and proteins (gelatin) [ 126 ]. Different polymers such as poly(ethylene glycol)-poly(3-caprolactone)-poly(ethylene glycol) [ 127 ], poly n -isopropylacrylamide/polyacrylic acid (PNIPAm/PAA) [ 128 ], poly( d , l -lactide)-block poly(ethylene glycol)-block-poly( d , l -lactide) (PDLLA-PEG-PDLLA) [ 129 ], poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) (PEO-PPO-PEO) [ 130 ], and PNIPAm-based hydrogels have also been reported in drug delivery [ 131 , 132 , 133 ] (see Table 1 ).…”
Section: Biomedical Applications Of Thermal-nanomaterialsmentioning
confidence: 99%
“…Several natural polymers that demonstrate thermally sensitive properties have been used for the synthesis of hydrogels such as polysaccharides (cellulose, chitosan and xiloglucan) [ 123 , 124 , 125 ] and proteins (gelatin) [ 126 ]. Different polymers such as poly(ethylene glycol)-poly(3-caprolactone)-poly(ethylene glycol) [ 127 ], poly n -isopropylacrylamide/polyacrylic acid (PNIPAm/PAA) [ 128 ], poly( d , l -lactide)-block poly(ethylene glycol)-block-poly( d , l -lactide) (PDLLA-PEG-PDLLA) [ 129 ], poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) (PEO-PPO-PEO) [ 130 ], and PNIPAm-based hydrogels have also been reported in drug delivery [ 131 , 132 , 133 ] (see Table 1 ).…”
Section: Biomedical Applications Of Thermal-nanomaterialsmentioning
confidence: 99%
“…Sun et al () introduced ionic coordination into chemically crosslinked PNIPAM network, obtaining porous hydrogels which demonstrate high thermosensitivity, as well as perfect mechanical strength. The hydrogels displayed increased stiffness with increased content of polymer chain density and ionic coordination.…”
Section: Thermoresponsive Hydrogelsmentioning
confidence: 99%
“…Among the few works performed in this direction, the results obtained by Zheng and co‐workers [ 8 ] can be cited here, where thermo‐ and redox‐responsive hydrogels based on copolymers of N ‐isopropylacrylamide (NIPAM) and an ionic liquid‐containing monomer were synthetized. [ 8 ] Those hydrogels presented a high thermoresponsive sensitivity and good redox‐responsiveness originating from the transition of iron ions between two oxidation states in the gel matrix and making them very interesting candidates for stimuli‐responsive electronic devices or other self‐adaptive electronics. [ 8 ] In another example, a dual redox‐ and thermoresponsive hydrogel was synthesized based on NIPAM and ferrocenyl silane‐vinyl imidazolium (FS‐Vim) ionic liquid monomers.…”
Section: Introductionmentioning
confidence: 99%
“…[ 8 ] Those hydrogels presented a high thermoresponsive sensitivity and good redox‐responsiveness originating from the transition of iron ions between two oxidation states in the gel matrix and making them very interesting candidates for stimuli‐responsive electronic devices or other self‐adaptive electronics. [ 8 ] In another example, a dual redox‐ and thermoresponsive hydrogel was synthesized based on NIPAM and ferrocenyl silane‐vinyl imidazolium (FS‐Vim) ionic liquid monomers. [ 9 ] In this system, the FS‐Vim poly(ionic liquid) was used as macrocrosslinker and provided redox‐responsive properties to the system while the lower critical transition temperature (LCST) of poly(NIPAM) was influenced by the incorporation of the poly(ionic liquid).…”
Section: Introductionmentioning
confidence: 99%