PT  - JOURNAL ARTICLE
AU  - Ge, Qi
AU  - Chen, Zhe
AU  - Cheng, Jianxiang
AU  - Zhang, Biao
AU  - Zhang, Yuan-Fang
AU  - Li, Honggeng
AU  - He, Xiangnan
AU  - Yuan, Chao
AU  - Liu, Ji
AU  - Magdassi, Shlomo
AU  - Qu, Shaoxing
TI  - 3D printing of highly stretchable hydrogel with diverse UV curable polymers
AID  - 10.1126/sciadv.aba4261
DP  - 2021 Jan 01
TA  - Science Advances
PG  - eaba4261
VI  - 7
IP  - 2
4099  - http://advances.sciencemag.org/content/7/2/eaba4261.short
4100  - http://advances.sciencemag.org/content/7/2/eaba4261.full
SO  - Sci Adv2021 Jan 01; 7
AB  - 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.