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Micro 3D Printing of a Temperature-Responsive Hydrogel Using Projection Micro-Stereolithography

Cited 188 time in Web of Science Cited 215 time in Scopus
Authors

Han, Daehoon; Lu, Zhaocheng; Chester, Shawn A.; Lee, Howon

Issue Date
2018-01
Publisher
Nature Publishing Group
Citation
Scientific Reports, Vol.8 No.1, p. 1963
Abstract
Stimuli-responsive hydrogels exhibiting physical or chemical changes in response to environmental conditions have attracted growing attention for the past few decades. Poly(N-isopropylacrylamide) (PNIPAAm), a temperature responsive hydrogel, has been extensively studied in various fields of science and engineering. However, manufacturing of PNIPAAm has been heavily relying on conventional methods such as molding and lithography techniques that are inherently limited to a two-dimensional (2D) space. Here we report the three-dimensional (3D) printing of PNIPAAm using a high-resolution digital additive manufacturing technique, projection micro-stereolithography (P mu SL). Control of the temperature dependent deformation of 3D printed PNIPAAm is achieved by controlling manufacturing process parameters as well as polymer resin composition. Also demonstrated is a sequential deformation of a 3D printed PNIPAAm structure by selective incorporation of ionic monomer that shifts the swelling transition temperature of PNIPAAm. This fast, high resolution, and scalable 3D printing method for stimuli-responsive hydrogels may enable many new applications in diverse areas, including flexible sensors and actuators, bio-medical devices, and tissue engineering.
ISSN
2045-2322
URI
https://hdl.handle.net/10371/201813
DOI
https://doi.org/10.1038/s41598-018-20385-2
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  • College of Engineering
  • Department of Mechanical Engineering
Research Area Additive Manufacturing, Architected Materials, Programmable Matter

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