Journal
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
Volume 4, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/2631-7990/ac376b
Keywords
hydrogel; 3D printing; photo-thermal response; shape memory; microrobot
Funding
- National Natural Science Foundation of China [52006056]
- Key-Area Research and Development Program of Guangdong Province [2020B090923003]
- Natural Science Foundation of Hunan [2020JJ3012]
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This study developed a photothermal responsive hydrogel based on N-isopropylacrylamide that can undergo fast and reversible deformation under near-infrared light, showing potential applications in biomedical engineering and microrobotics.
Hydrogels with stimuli-responsive capabilities are gaining more and more attention nowadays with prospective applications in biomedical engineering, bioelectronics, microrobot, etc. We develop a photothermal responsive hydrogel based on N-isopropylacrylamide that achieved a fast and reversible deformation manipulated only by near-infrared (NIR) light. The hydrogel was fabricated by the projection micro stereolithography based 3D printing technique, which can rapidly prototype complex 3D structures. Furthermore, with the variation of the grayscale while manufacturing the hydrogel, the deformation of the hydrogel structure can be freely tuned within a few seconds by losing and absorbing water through adjusting the intensity and the irradiation direction of the NIR light, showing a potential application in ultra-fast object grabbing and transportation. The present study provides a new method for designing ultrafast photothermal responsive hydrogel based microrobot working in water.
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