Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels
Light-responsive hydrogels containing light-thermal convertible pigments have received interest for their possible applications in light-responsive shutters, valves, drug delivery systems, etc. However, their utility is limited by the slow response time. In this study, we investigated the use of mic...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/9/11/880 |
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| author | Saho Kuroki Masaya Kubota Ryota Haraguchi Yushi Oishi Takayuki Narita |
| author_facet | Saho Kuroki Masaya Kubota Ryota Haraguchi Yushi Oishi Takayuki Narita |
| author_sort | Saho Kuroki |
| collection | DOAJ |
| description | Light-responsive hydrogels containing light-thermal convertible pigments have received interest for their possible applications in light-responsive shutters, valves, drug delivery systems, etc. However, their utility is limited by the slow response time. In this study, we investigated the use of micro-nano bubble water as a preparation solvent to accelerate the volume phase transition kinetics of poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AAc) hydrogels. The hydrogels were characterized by dynamic light scattering (DLS) and dissolved oxygen (DO) measurements. The mechanical properties, surface morphology, and chemical composition of the hydrogels were analyzed by Young’s modulus measurements, scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy, respectively. The results showed that hydrogels prepared with bubble water changed the volume transition rate by more than two orders of magnitude by simply changing the standing time of the bubble water for only a few hours. The cooperative diffusion coefficients obtained from the light-induced volume transition kinetics correlated linearly with Young’s modulus and metastable state swelling ratio. Our results suggest that bubbles act as efficient water channels, thereby modulating the response rate and providing a simple, additive-free method for preparing hydrogels with a wide range of response rates. |
| first_indexed | 2024-03-09T16:49:23Z |
| format | Article |
| id | doaj.art-ed6f32e793e64e64974de2849a5fb0f4 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T16:49:23Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-ed6f32e793e64e64974de2849a5fb0f42023-11-24T14:43:22ZengMDPI AGGels2310-28612023-11-0191188010.3390/gels9110880Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc HydrogelsSaho Kuroki0Masaya Kubota1Ryota Haraguchi2Yushi Oishi3Takayuki Narita4Department of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, JapanDepartment of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, JapanDepartment of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, JapanDepartment of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, JapanDepartment of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, JapanLight-responsive hydrogels containing light-thermal convertible pigments have received interest for their possible applications in light-responsive shutters, valves, drug delivery systems, etc. However, their utility is limited by the slow response time. In this study, we investigated the use of micro-nano bubble water as a preparation solvent to accelerate the volume phase transition kinetics of poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AAc) hydrogels. The hydrogels were characterized by dynamic light scattering (DLS) and dissolved oxygen (DO) measurements. The mechanical properties, surface morphology, and chemical composition of the hydrogels were analyzed by Young’s modulus measurements, scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy, respectively. The results showed that hydrogels prepared with bubble water changed the volume transition rate by more than two orders of magnitude by simply changing the standing time of the bubble water for only a few hours. The cooperative diffusion coefficients obtained from the light-induced volume transition kinetics correlated linearly with Young’s modulus and metastable state swelling ratio. Our results suggest that bubbles act as efficient water channels, thereby modulating the response rate and providing a simple, additive-free method for preparing hydrogels with a wide range of response rates.https://www.mdpi.com/2310-2861/9/11/880volume phase transitionmicro-nano bubble waterphoto-thermal conversionshrinking behavior |
| spellingShingle | Saho Kuroki Masaya Kubota Ryota Haraguchi Yushi Oishi Takayuki Narita Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels Gels volume phase transition micro-nano bubble water photo-thermal conversion shrinking behavior |
| title | Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels |
| title_full | Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels |
| title_fullStr | Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels |
| title_full_unstemmed | Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels |
| title_short | Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels |
| title_sort | additive free method for enhancing the volume phase transition rate in light responsive hydrogels a study of micro nano bubble water on pnipam co aac hydrogels |
| topic | volume phase transition micro-nano bubble water photo-thermal conversion shrinking behavior |
| url | https://www.mdpi.com/2310-2861/9/11/880 |
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