Well-adhering, easily producible photonic reflective coatings for plastic substrates

Ellen P.A. van Heeswijk, Joey J.H. Kloos, Jos de Heer, Theo Hoeks, Nadia Grossiord, Albertus P.H.J. Schenning

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)
81 Downloads (Pure)

Abstract

The development of well-adhering, easily producible photonic reflective coatings is still a challenge. Here, an easy-to-produce, industrial viable process is reported that uses a primer layer of the so-called type II photoinitiator to obtain an excellent adhesion between a plastic substrate and one-dimensional (1D) photonic liquid crystalline coatings. Furthermore, a good alignment of the reactive cholesteric liquid crystal mixture is obtained using a bar-coating process, without alignment layers or surfactants. After photopolymerization, cross-hatch tape tests show a good adhesion of the photonic coating having a reflection band of 50% transmission with almost no scattering. Additionally, we demonstrate the ability to create well-adhering ∼100% reflective coatings by coating double layers and the ability to create single-layered cholesteric broadband reflectors using solely a reactivity gradient created by the primer layer. Our new interfacial method gives new opportunities to use reflecting 1D photonic coatings in industrial processes and applications and allows the bonding of almost any polymer to a plastic substrate.

Original languageEnglish
Pages (from-to)30008-30013
Number of pages6
JournalACS Applied Materials & Interfaces
Volume10
Issue number35
DOIs
Publication statusPublished - 5 Sep 2018

Keywords

  • adhesion
  • alignment
  • liquid crystals
  • photonic reflective coatings
  • polycarbonate

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