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<p>Various potential hydrosilylation inhibitors were incorporated into a silicone formulation for 3D printing. Different inhibitors resulted in peak cure temperatures from 42.8 to 180.3°C. The curing behavior of formulations with 1-ethynyl-1-cyclohexanol (ETCH), which exhibited a peak cure temperature of 98.4°C, was characterized for different ETCH concentrations and storage conditions. The curing was modeled using time temperature superposition, revealing an activation barrier of 89&#xa0;kJ/mol. Overall, characterization resulted in a conservative recommended shelf life of 90 days. These studies offer insights into the stability of these formulations and the importance of inhibition for producing reliable, printable inks.</p> Graphical Abstract <p></p>

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Curing inhibition and shelf stability in silicone formulations for direct ink writing

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Fangyou Xie,
  • Lina N. Ghanbari,
  • Amitesh Maiti,
  • Derrick C. Kaseman,
  • Andrew Alexopoulos,
  • Jeremy M. Lenhardt,
  • Michael J. Ford

摘要

Various potential hydrosilylation inhibitors were incorporated into a silicone formulation for 3D printing. Different inhibitors resulted in peak cure temperatures from 42.8 to 180.3°C. The curing behavior of formulations with 1-ethynyl-1-cyclohexanol (ETCH), which exhibited a peak cure temperature of 98.4°C, was characterized for different ETCH concentrations and storage conditions. The curing was modeled using time temperature superposition, revealing an activation barrier of 89 kJ/mol. Overall, characterization resulted in a conservative recommended shelf life of 90 days. These studies offer insights into the stability of these formulations and the importance of inhibition for producing reliable, printable inks.

Graphical Abstract