Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)

Abstract

In this work, we present patterned water-responsive coatings, which alter both their topological and optical properties. The polymer coatings are based on a hydrogen-bonded cholesteric liquid crystalline polymer network. A two-step photopolymerization procedure leads to a patterned coating with repeating liquid crystalline and isotropic areas. The cholesteric liquid crystalline areas reflect green light, whilst the isotropic areas are transparent for visible light. Treatment with alkaline solution results in a hygroscopic polymer salt coating. When placed in demineralized water, the polymer films swells, leading to an enhancement of the surface topography structure in which the liquid crystalline areas swell more. Moreover, the pitch of the helical organization in the cholesteric areas increases due to this swelling leading to a color change from green to red.

LanguageEnglish
Title of host publicationOrganic photonics VI : 15 - 16 April 2014, Brussels, Belgium
Place of PublicationBellingham
PublisherSPIE
Number of pages7
ISBN (Print)9781628410853
DOIs
StatePublished - 2014
EventOrganic photonics VI, April 15-16, 2014, Brussels, Belgium - Brussels, Belgium
Duration: 15 Apr 201416 Apr 2014

Publication series

NameProceedings of SPIE
Volume9137
ISSN (Print)0277-786X

Conference

ConferenceOrganic photonics VI, April 15-16, 2014, Brussels, Belgium
CountryBelgium
CityBrussels
Period15/04/1416/04/14

Fingerprint

Liquid Crystalline Polymer
Liquid crystal polymers
Coating
Water
coatings
Coatings
polymers
liquids
Crystalline materials
Polymers
water
Liquid
Liquids
Methyl Green
Photopolymerization
Surface topography
Surface Topography
Polymer films
Swelling
Hydrogen

Keywords

  • cholesteric liquid crystals
  • patterned surfaces
  • responsive optical coatings
  • responsive surface topographies
  • water-responsive

Cite this

Stumpel, J. E., Broer, D. J., Bastiaansen, C. W. M., & Schenning, A. P. H. J. (2014). Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. In Organic photonics VI : 15 - 16 April 2014, Brussels, Belgium [91370U] (Proceedings of SPIE; Vol. 9137). Bellingham: SPIE. DOI: 10.1117/12.2052678
Stumpel, J.E. ; Broer, D.J. ; Bastiaansen, C.W.M. ; Schenning, A.P.H.J./ Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. Organic photonics VI : 15 - 16 April 2014, Brussels, Belgium. Bellingham : SPIE, 2014. (Proceedings of SPIE).
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Stumpel, JE, Broer, DJ, Bastiaansen, CWM & Schenning, APHJ 2014, Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. in Organic photonics VI : 15 - 16 April 2014, Brussels, Belgium., 91370U, Proceedings of SPIE, vol. 9137, SPIE, Bellingham, Organic photonics VI, April 15-16, 2014, Brussels, Belgium, Brussels, Belgium, 15/04/14. DOI: 10.1117/12.2052678

Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. / Stumpel, J.E.; Broer, D.J.; Bastiaansen, C.W.M.; Schenning, A.P.H.J.

Organic photonics VI : 15 - 16 April 2014, Brussels, Belgium. Bellingham : SPIE, 2014. 91370U (Proceedings of SPIE; Vol. 9137).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AB - In this work, we present patterned water-responsive coatings, which alter both their topological and optical properties. The polymer coatings are based on a hydrogen-bonded cholesteric liquid crystalline polymer network. A two-step photopolymerization procedure leads to a patterned coating with repeating liquid crystalline and isotropic areas. The cholesteric liquid crystalline areas reflect green light, whilst the isotropic areas are transparent for visible light. Treatment with alkaline solution results in a hygroscopic polymer salt coating. When placed in demineralized water, the polymer films swells, leading to an enhancement of the surface topography structure in which the liquid crystalline areas swell more. Moreover, the pitch of the helical organization in the cholesteric areas increases due to this swelling leading to a color change from green to red.

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Stumpel JE, Broer DJ, Bastiaansen CWM, Schenning APHJ. Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatings. In Organic photonics VI : 15 - 16 April 2014, Brussels, Belgium. Bellingham: SPIE. 2014. 91370U. (Proceedings of SPIE). Available from, DOI: 10.1117/12.2052678