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Rapid Additive Manufacturing of 3D Geometric Structures via Dual-Wavelength Polymerization

机译：通过双波长聚合的快速添加剂制造3D几何结构

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摘要

A dual-wavelength photopolymerization process is presented, allowing for the volumetric fabrication of complex geometries using a multistep process. The methacrylate-based resin contained 0.1 wt % camphorquinone/0.1 wt % ethyl 4-(dimethylamino) benzoate and 0.2 wt % bis[2-(ochlorophenyl)-4,5-diphenylimidazole] as photoinitiator (473 nm) and photoinhibitor (365 nm), respectively. The photoinitiator and photoinhibitor concentrations were optimized to allow for photocuring to full depth (4.6 mm) following an exposure time of 2 min solely by 473 nm light, but no curing occurred when 365 nm light was present due to photoinhibition. This resin was validated using one-step volumetric fabrication of two objects containing voids defined by the 365 nm irradiation region. Two more complex structures were printed in a step-by-step manner, relying on the dynamic control of the projection patterns of both 365 and 473 nm projectors, decreasing the print time from 20 min using a commercially available single wavelength resin printer to 2 min.
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  • 来源
    《ACS Macro Letters》 |2020年第10期|共6页
  • 作者

    Feng Li; Stuart C. Thickett; Fernando Maya; Egan H. Doeven; Rosanne M. Guijt; Michael C. Breadmore;

  • 作者单位

    Australian Centre for Research on Separation Science (ACROSS) School of Natural Sciences (Chemistry) University of Tasmania;

    School of Natural Sciences (Chemistry) University of Tasmania;

    Australian Centre for Research on Separation Science (ACROSS) School of Natural Sciences (Chemistry) University of Tasmania;

    Deakin University Centre for Rural and Regional Futures;

    Deakin University Centre for Rural and Regional Futures;

    Australian Centre for Research on Separation Science (ACROSS) School of Natural Sciences (Chemistry) University of Tasmania;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
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