Additive manufacturing with a flex activated mechanophore for nondestructive assessment of mechanochemical reactivity in complex object geometries

POLYMER

卷:152

Article

Cao, Bo¹  Boechler, Nicholas²  Boydston, Andrew J.¹ 

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

[2] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA

关键词: Additive manufacturing;    Mechanochemistry;    Vat photopolymerization;    Lattice structures;    Microstructured materials;   

DOI  :  10.1016/j.polymer.2018.05.038

来源: Elsevier

【 摘 要 】

We used digital light processing additive manufacturing (DLP-AM) to produce mechanochemically responsive test specimens from custom photoresin formulations, wherein designer, flex activated mechanophores enable quantitative assessment of the total mechanophore activation in the specimen. The manufactured object geometries included an octet truss unit cell, a gyroid lattice, and an 8D cubic lattice. The mechanophore activation in each test specimen was measured as a function of uniaxial compressive strain applied to the structure. Full shape recovery after compression was exhibited in all cases. These proof-of-concept results signify the potential to use flex activated mechanophore for nondestructive, quantitative volumetric assessment of mechanochemistry in test specimens with complex geometries. Additionally, the integration of DLP-AM with flex activated mechanophore build materials enabled the creation of customizable, three-dimensional mechanochemically responsive parts that exhibit small molecule release without undergoing irreversible deformation or fracture. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free