Controlled Cooperative Wetting Enabled Heterogeneous Structured 3D Morphing Transducers

Sridhar, Sreepathy, Wang, Cong, Terry, Jonathan G., Chen, Xue, Sun, Ansu, Li, Zhenghong, Xu, Bin and Li, Yifan (2021) Controlled Cooperative Wetting Enabled Heterogeneous Structured 3D Morphing Transducers. Advanced Materials Interfaces, 8 (2). p. 2001211. ISSN 2196-7350

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Abstract

A unique microfluidics approach for functional hydrogel patterning with multilayered heterogeneous structures is presented. Prepolymer solution droplets with differentiated sodium acrylate concentrations are dispensed/printed in a wetting‐controlled “two‐parallel plate” (TPP, like a Hele‐Shaw Cell) system. The gelation within the system enables hydrogel bilayer structures with reconfigurable 3D deformations driven by in‐plane and through‐thickness heterogeneity under stimuli‐responsive mask‐less swelling/deswelling. The cooperation between swelling mismatch of functional groups results in a higher complexity of 3D reconfiguration in responding to discrete levels of stimulation inputs. This facile patterning technology with an in‐built ionic hierarchy can be scaled up/down with advanced transducing functionalities in various fields.

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