Multimaterial additive manufacturing is challenging due to material and printing technology limitations. This paper presents a resin design strategy for single-vat single-cure grayscale digital light processing (g-DLP) 3D printing, where light intensity controls monomer conversion to form a highly stretchable soft organogel to a stiff thermoset within a single layer. High modulus contrast and stretchability are realized simultaneously at high printing speed (1 mm/min). The capability enables 3D printed structures for biomimetic designs, inflatable soft robots and actuators, and soft stretchable electronics. This resin design strategy provides a material solution for multimaterial additive manufacturing.

Liang Yue, S. Macrae Montgomery, Xiaohao Sun, Luxia Yu, Yuyang Song, Tsuyoshi Nomura, Masato Tanaka, H. Jerry Qi