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Additive manufacturing of high aspect-ratio structures with self-focusing photopolymerization

Light(Advanced Manufacturing) 2022年第3期3卷 120-149页

作者： Mingyu Yang Kavin Kowsari Nia O.Myrie Daniela Espinosa-Hoyos anna jagielska Seok Kim Nicholas X.Fang Krystyn J.Van Vliet Harvard-MIT Health Sciences and Technology Massachusetts Institute of TechnologyCambridgeMA02139United States Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA02139United States Department of Radiology Brigham and Women’s HospitalHarvard Medical SchoolBostonMA02115United States Department of Biological Engineering Massachusetts Institute of TechnologyCambridgeMA02139United States Walter H.Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University School of MedicineAtlantaGA30332United States Department of Chemical Engineering Massachusetts Institute of TechnologyCambridgeMA02139United States Department of Materials Science&Engineering Massachusetts Institute of TechnologyCambridgeMA02139United States Department of Mechanical Engineering Changwon National UniversityChangwon51140South Korea

Photocrosslinkable polymers have been exploited to attain impressive advantages in printing freestanding,micrometer-scale,mechanically compliant ***,a more integrated understanding of both the polymer photochemistry and the microfabrication processes could enable new strategic design avenues,unlocking far-reaching applications of the light-based modality of additive *** promising approach for achieving high-aspect-ratio structures is to leverage the phenomenon of light self-trapping during the photopolymerization *** this review,we discuss the design of materials that facilitate this optical behavior,the computational modeling and practical processing considerations to achieve high aspect-ratio structures,and the range of applications that can benefit from architectures fabricated using light self-trapping-especially those demanding free-standing structures and materials of stiffnesses relevant in biological *** interactions exist among material attributes,including polymer composition,and processing parameters such as light *** identify strong opportunities for predictive design of both the material and the ***,this perspective describes the wide range of existing polymers and additive manufacturing approaches,and highlights various future directions to enable constructs with new complexities and functionalities through the development of next-generation photocrosslinkable materials and micromanufacturing methods.

关键词： Additive manufacturing Optical waveguide High aspect-ratio Biocompatible structures Polymer photochemistry

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