| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
Virtual Lightning Session |
| 제목 |
Tunable Swelling and Deswelling of Temperature- and Light-responsive Graphene Oxide-Poly(N-isopropylacrylamide) Composite Hydrogels |
| 초록 |
Swelling and deswelling behaviors of stimuli-responsive composite hydrogels are critical for their use in soft robotics and biomedical applications. However, typical additives such as gold and iron oxide nanoparticles are not involved with polymer networks, limiting the design of three-dimensional (3D) shape morphing and actuation. Owing to the amphiphilicity of graphene oxide (GO), it has been used as a photothermal additive in temperature-responsive poly(N-isopropylacrylamide) (PNIPAM) hydrogel. We demonstrate a GO-PNIPAM composite hydrogels with tunable swelling and deswelling behaviors by controlling the concentration of GO and chemical crosslinker, and the rate of external temperature change. The linear deswelling ratio change is more than 20% upon different heating process. We anticipate the internal microstructure as a function of concentrations of GO and chemical crosslinkers explain their different swelling and deswelling ratios. Furthermore, the light-driven 3D shape deformation of GO-PNIPAM is demonstrated by utilizing the photothermal properties of GO. |
| 저자 |
Minghao Li, Jinhye Bae
|
| 소속 |
Univ. of California San Diego |
| 키워드 |
- |
| E-Mail |
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