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Multi-color dual wavelength vat photopolymerization 3D printing via spatially controlled acidity

Author

Listed:
  • Kyle C. H. Chin

    (University of Wisconsin)

  • Grant Ovsepyan

    (University of Wisconsin)

  • Andrew J. Boydston

    (University of Wisconsin
    University of Wisconsin
    University of Wisconsin)

Abstract

Dual wavelength vat photopolymerization (DW-VP) has emerged as a powerful approach to create multimaterial objects. However, only a limited range of properties have been showcased. In this work, we report the 3D printing (3DP) of multi-color objects from a single resin vat using DW-VP. This was accomplished by concurrently curing resin with visible light and modulating local resin color with 365-nm ultraviolet (UV) light. The key advance was to use a photoacid generator (PAG) in combination with pH responsive dyes in the 3DP resins. The specific color is dictated by the extent of reaction, or local acidity in our case, and controlled by the light dosage and pattern of UV light applied. Multi-color object formation was implemented in two-step processes involving first 3DP to set the object structure, followed by UV exposure, as well as single processes that leveraged DW-VP to create a broad range of vibrant colors and patterns.

Suggested Citation

  • Kyle C. H. Chin & Grant Ovsepyan & Andrew J. Boydston, 2024. "Multi-color dual wavelength vat photopolymerization 3D printing via spatially controlled acidity," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48159-7
    DOI: 10.1038/s41467-024-48159-7
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    References listed on IDEAS

    as
    1. J. J. Schwartz & A. J. Boydston, 2019. "Multimaterial actinic spatial control 3D and 4D printing," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
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    3. Bin Wang & Einstom Engay & Peter R. Stubbe & Saeed Z. Moghaddam & Esben Thormann & Kristoffer Almdal & Aminul Islam & Yi Yang, 2022. "Stiffness control in dual color tomographic volumetric 3D printing," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    4. Liang Yue & S. Macrae Montgomery & Xiaohao Sun & Luxia Yu & Yuyang Song & Tsuyoshi Nomura & Masato Tanaka & H. Jerry Qi, 2023. "Single-vat single-cure grayscale digital light processing 3D printing of materials with large property difference and high stretchability," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    5. Jianxiang Cheng & Rong Wang & Zechu Sun & Qingjiang Liu & Xiangnan He & Honggeng Li & Haitao Ye & Xingxin Yang & Xinfeng Wei & Zhenqing Li & Bingcong Jian & Weiwei Deng & Qi Ge, 2022. "Centrifugal multimaterial 3D printing of multifunctional heterogeneous objects," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
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