Air-curable, high-resolution patternable oxetane-based liquid crystalline photonic films via flexographic printing

Davey C. Hoekstra, Koen Nickmans, Johan Lub, Michael G. Debije, Albert P.H.J. Schenning (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The production of patterned photonic films on a large scale remains a challenge. Here, we report on a new class of photonic materials that are based on oxetane liquid crystals (LCs). Patterned reflective coatings can be produced from these materials on flexible substrates by using flexographic printing. This industrially relevant process allows for upscaling in future applications. Furthermore, the oxetane LCs used do not require an inert atmosphere for photopolymerization, unlike previously described acrylate systems. We show that the flexographic printing process results in excellent alignment, and that the patterns produced display a high resolution. Additionally, we demonstrate that free-standing photonic reflecting foils can also be produced from these materials. Our new oxetane-based patterned iridescent colored materials have potential application for both esthetic purposes as well as anticounterfeit labels.

Original languageEnglish
Pages (from-to)7423-7430
Number of pages8
JournalACS Applied Materials & Interfaces
Volume11
Issue number7
Early online date28 Jan 2019
DOIs
Publication statusPublished - 20 Feb 2019

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Keywords

  • flexographic printing
  • liquid crystals
  • oxetane polymers
  • photonic crystals
  • reflective films

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