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Related Experiment Video

Updated: Aug 12, 2025

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NIR-Triggered High-Efficiency Self-Healable Protective Optical Coating for Vision Systems.

Ji-Eun Jeong1, Jae-Won Lee2, Mi Ju Bae1

  • 1Department of Specialty Chemicals, Division of Specialty and Bio-Based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan44412, Republic of Korea.

ACS Applied Materials & Interfaces
|February 1, 2023
PubMed
Summary
This summary is machine-generated.

New self-healing coatings for optical components use photothermal effects for rapid scratch repair. This technology restores light signals in vision systems, even under sunlight, with low energy consumption.

Keywords:
dynamic polymer networksintrinsic self-healingoptical protection coatingphotothermalthiourethane exchange

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Self-healing materials are advancing to restore diverse properties, with significant industrial interest in coatings for vision system optics.
  • Protection coatings for lenses in augmented reality glasses and sensors require robust self-healing capabilities.

Purpose of the Study:

  • To design and demonstrate polythiourethane dynamic networks as self-healing protection coatings for optical components.
  • To investigate the photothermal self-healing properties of these coatings under near-infrared (NIR) radiation and sunlight.

Main Methods:

  • Synthesized polythiourethane dynamic networks incorporating a photothermal dye.
  • Characterized optical properties (transmittance, refractive index, Abbe number) and surface hardness.
  • Evaluated self-healing performance via NIR-induced temperature increase and scratch restoration on lens protectors.

Main Results:

  • The optimized coating achieved ~95% transmittance, a tunable refractive index up to 1.6, a moderate Abbe number (~35), and high surface hardness (>200 MPa).
  • NIR radiation (1064 nm) induced a surface temperature of 75 °C, enabling self-healing through dynamic thiourethane exchange.
  • Scratched coatings on lens protectors demonstrated complete restoration of light signal integrity after NIR-induced healing.

Conclusions:

  • Polythiourethane dynamic networks with photothermal dyes show great potential for self-healing optical coatings.
  • The demonstrated NIR- and sunlight-induced self-healing offers a low-energy solution for maintaining optical component functionality.
  • This technology is suitable for protecting optical components in advanced vision systems.