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Color-Switchable Polar Polymeric Materials.

Wenlian Qiu1, Paul A Gurr1, Greg G Qiao1

  • 1Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia.

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|July 24, 2019
PubMed
Summary
This summary is machine-generated.

This study successfully incorporated spiropyrans into polar polymer matrices, creating novel mechanochromic materials. These materials exhibit light- and water-swelling-induced color changes, expanding applications for spiropyran mechanophores.

Keywords:
color-switchingmechanochromismnegative photochromismpolar polymerspiropyranwater-swelling

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Photochemistry

Background:

  • Spiropyrans are key mechanophores with limited use in polar polymers.
  • Incorporating spiropyrans into polar matrices enables innovative mechanochromic devices.

Purpose of the Study:

  • Synthesize and integrate spiropyrans into poly(hydroxyethyl acrylate) (PHEA).
  • Investigate light- and water-swelling-induced color switching in these novel materials.
  • Explore the impact of polar environments and cross-linking on spiropyran behavior.

Main Methods:

  • Synthesis of spiropyrans with varying attachment points.
  • Covalent bonding of spiropyrans into PHEA matrices.
  • Photochromism and mechanochromism measurements in solution and bulk polymers.

Main Results:

  • Achieved reversible color switching triggered by light and water swelling.
  • Tri-substituted spiropyran (SP3) showed rapid color activation during swelling.
  • Polar environment and cross-link density influenced color intensity and switching rates.

Conclusions:

  • Demonstrated successful integration of spiropyrans into polar PHEA for mechanochromic applications.
  • Highlighted the tunable nature of spiropyran properties for diverse stimuli-responsive materials.
  • Opened avenues for designing advanced color-switchable materials.