UV-curable thiol-ene system for broadband infrared transparent objects

Piaoran Ye, Zhihan Hong, Douglas A. Loy and Rongguang Liang ()
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Piaoran Ye: The University of Arizona
Zhihan Hong: The University of Arizona
Douglas A. Loy: The University of Arizona
Rongguang Liang: The University of Arizona

Nature Communications, 2023, vol. 14, issue 1, 1-15

Abstract: Abstract Conventional infrared transparent materials, including inorganic ceramic, glass, and sulfur-rich organic materials, are usually processed through thermal or mechanical progress. Here, we report a photo-curable liquid material based on a specially designed thiol-ene strategy, where the multithiols and divinyl oligomers were designed to contain only C, H, and S atoms. This approach ensures transparency in a wide range spectrum from visible light to mid-wave infrared (MWIR), and to long-wave infrared (LWIR). The refractive index, thermal properties, and mechanical properties of samples prepared by this thiol-ene resin were characterized. Objects transparent to LWIR and MWIR were fabricated by molding and two-photon 3D printing techniques. We demonstrated the potential of our material in a range of applications, including the fabrication of IR optics with high imaging resolution and the construction of micro-reactors for temperature monitoring. This UV-curable thiol-ene system provides a fast and convenient alternative for the fabrication of thin IR transparent objects.

Date: 2023
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DOI: 10.1038/s41467-023-44273-0

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