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3D-printed liquid metal polymer composites as NIR-responsive 4D printing soft robot.


ABSTRACT: 4D printing combines 3D printing with nanomaterials to create shape-morphing materials that exhibit stimuli-responsive functionalities. In this study, reversible addition-fragmentation chain transfer polymerization agents grafted onto liquid metal nanoparticles are successfully employed in ultraviolet light-mediated stereolithographic 3D printing and near-infrared light-responsive 4D printing. Spherical liquid metal nanoparticles are directly prepared in 3D-printed resins via a one-pot approach, providing a simple and efficient strategy for fabricating liquid metal-polymer composites. Unlike rigid nanoparticles, the soft and liquid nature of nanoparticles reduces glass transition temperature, tensile stress, and modulus of 3D-printed materials. This approach enables the photothermal-induced 4D printing of composites, as demonstrated by the programmed shape memory of 3D-printed composites rapidly recovering to their original shape in 60 s under light irradiation. This work provides a perspective on the use of liquid metal-polymer composites in 4D printing, showcasing their potential for application in the field of soft robots.

SUBMITTER: Zhang L 

PROVIDER: S-EPMC10684855 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature

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3D-printed liquid metal polymer composites as NIR-responsive 4D printing soft robot.

Zhang Liwen L   Huang Xumin X   Cole Tim T   Lu Hongda H   Hang Jiangyu J   Li Weihua W   Tang Shi-Yang SY   Boyer Cyrille C   Davis Thomas P TP   Qiao Ruirui R  

Nature communications 20231128 1


4D printing combines 3D printing with nanomaterials to create shape-morphing materials that exhibit stimuli-responsive functionalities. In this study, reversible addition-fragmentation chain transfer polymerization agents grafted onto liquid metal nanoparticles are successfully employed in ultraviolet light-mediated stereolithographic 3D printing and near-infrared light-responsive 4D printing. Spherical liquid metal nanoparticles are directly prepared in 3D-printed resins via a one-pot approach,  ...[more]

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