Journal
SCIENCE ADVANCES
Volume 7, Issue 2, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aba4261
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Funding
- Key-Area Research and Development Program of Guangdong Province [2020B090923003]
- National Natural Science Foundation of China [51903210, 11525210, 91748209]
- Fundamental Research Funds for the Central Universities [31020190QD015, 2020XZZX005-02]
- China Scholarship Council (CSC) [CSC201806130090]
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This study presents a new multimaterial 3D printing approach for fabricating complex hybrid 3D structures consisting of hydrogels and UV-curable polymers, paving the way for multifunctional soft devices and machines.
Hydrogel-polymer hybrids have been widely used for various applications such as biomedical devices and flexible electronics. However, the current technologies constrain the geometries of hydrogel-polymer hybrid to laminates consisting of hydrogel with silicone rubbers. This greatly limits functionality and performance of hydrogel-polymer-based devices and machines. Here, we report a simple yet versatile multimaterial 3D printing approach to fabricate complex hybrid 3D structures consisting of highly stretchable and high-water content acrylamide-PEGDA (AP) hydrogels covalently bonded with diverse UV curable polymers. The hybrid structures are printed on a self-built DLP-based multimaterial 3D printer. We realize covalent bonding between AP hydrogel and other polymers through incomplete polymerization of AP hydrogel initiated by the water-soluble photoinitiator TPO nanoparticles. We demonstrate a few applications taking advantage of this approach. The proposed approach paves a new way to realize multifunctional soft devices and machines by bonding hydrogel with other polymers in 3D forms.
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