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<p>Light curable materials are extensively used in fields such as 3D printing, coatings, and photo-patterning; however, changing their mechanical properties after polymerization is rather difficult. Herein, a dual-wavelength responsive thiol-methacrylate system is introduced. Methacrylate functionalized anthracene moieties that undergo photodimerization upon illumination with 365&#xa0;nm light are incorporated into a thiol-methacrylate system, which is cured at 450&#xa0;nm beforehand. Sequentially orthogonal illumination at 365&#xa0;nm, therefore, results in a pronounced change in mechanical properties. Specifically, a shift from 7.4 to 19.9&#xa0;MPa in Young’s modulus was achieved through the addition of anthracene crosslinks, making this resin system a promising candidate for multi-material 3D printing.</p> Graphical Abstract <p></p>

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Using sequentially orthogonal photoreactions to tune mechanical properties of thiol-methacrylate networks

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月22日

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  • Rita Johanna Höller,
  • Michael Dörfler,
  • Christoph Waly,
  • Stefanie Monika Müller,
  • Thomas Griesser

摘要

Light curable materials are extensively used in fields such as 3D printing, coatings, and photo-patterning; however, changing their mechanical properties after polymerization is rather difficult. Herein, a dual-wavelength responsive thiol-methacrylate system is introduced. Methacrylate functionalized anthracene moieties that undergo photodimerization upon illumination with 365 nm light are incorporated into a thiol-methacrylate system, which is cured at 450 nm beforehand. Sequentially orthogonal illumination at 365 nm, therefore, results in a pronounced change in mechanical properties. Specifically, a shift from 7.4 to 19.9 MPa in Young’s modulus was achieved through the addition of anthracene crosslinks, making this resin system a promising candidate for multi-material 3D printing.

Graphical Abstract