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Developing Stretchable and Photo-Responsive Conductive Films by Incorporation of Spiropyran into Poly(ionic liquid)s AITranslate

ChiaWei Chang; ChiaTi Wu; YuLiang Lin; LinRuei Lee; HuanWei Lin; Bhaskarchand Gautam; YuHsuan Tseng; ChihWei Liao; ChunTing Chang; JiunTai Chen;
National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University; National Yang Ming Chiao Tung University
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Publisher: ACS
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Abstract AITranslate

Poly(ionic liquid)s (PILs) have been widely applied in various disciplines because of their unique physical, chemical, and electrical characteristics. To broaden the applications of PILs, stimuli-responsive PILs based on different stimuli have been investigated. Special stimuli-dependent properties of PILs, especially photo-regulated electrical conductivities, however, have not yet been fully accomplished. In this work, we study the photo-regulated electrical conductivities of PIL films by using [C3mim-MA][TFSI], azobisisobutyronitrile, and poly(ethylene glycol) dimethacrylate as an ionic liquid monomer, an initiator, and a crosslinker, respectively. Spiropyran (SP) molecules, which can convert to merocyanine molecules under UV light irradiation, are used as photo-responsive agents. As a result, stretchable and photo-responsive conductive PIL-SP films can be fabricated, which can be reversibly converted to PIL-merocyanine films under UV and visible light illuminations. The photoluminescence properties are confirmed by fluorescence and UV–vis spectra. Furthermore, the reversible photo-regulated electrical properties are investigated by shining UV and visible lights, presented by the Bode plots and Nyquist plots. The PIL-SP films with different crosslinker ratios (1, 5, and 10×) all exhibit similar photo-regulating electrical properties. At higher crosslinker ratios, the DC resistances are higher, resulting in lower conductivities. The study of stretchable and photo-responsive conductive PIL-SP films expands the applications of PIL materials.

KeyWords AITranslate

conductive crosslinking photoresponsive poly(ionic liquid) spiropyran
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.3c00422

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Citation Information:

Poly(ionic liquid)s (PILs) have been widely applied in various disciplines because of their unique physical, chemical, and electrical characteristics. To broaden the applications of PILs, stimuli-responsive PILs based on different stimuli have been investigated. Special stimuli-dependent properties of PILs, especially photo-regulated electrical conductivities, however, have not yet been fully accomplished. In this work, we study the photo-regulated electrical conductivities of PIL films by using [C3mim-MA][TFSI], azobisisobutyronitrile, and poly(ethylene glycol) dimethacrylate as an ionic liquid monomer, an initiator, and a crosslinker, respectively. Spiropyran (SP) molecules, which can convert to merocyanine molecules under UV light irradiation, are used as photo-responsive agents. As a result, stretchable and photo-responsive conductive PIL-SP films can be fabricated, which can be reversibly converted to PIL-merocyanine films under UV and visible light illuminations. The photoluminescence properties are confirmed by fluorescence and UV–vis spectra. Furthermore, the reversible photo-regulated electrical properties are investigated by shining UV and visible lights, presented by the Bode plots and Nyquist plots. The PIL-SP films with different crosslinker ratios (1, 5, and 10×) all exhibit similar photo-regulating electrical properties. At higher crosslinker ratios, the DC resistances are higher, resulting in lower conductivities. The study of stretchable and photo-responsive conductive PIL-SP films expands the applications of PIL materials.

quote

GB/T 7714-2015 [1] ChiaWei Chang, ChiaTi Wu, YuLiang Lin, et al. ACS Applied Polymer Materials, 2023(5). DOI:10.1021/acsapm.3c00422.
MLA [1] ChiaWei Chang, et al., ACS Applied Polymer Materials, no. 5, 2023, https://doi.org/10.1021/acsapm.3c00422.
APA [1] ChiaWei Chang, ChiaTi Wu, YuLiang Lin, LinRuei Lee, HuanWei Lin, Bhaskarchand Gautam, YuHsuan Tseng, ChihWei Liao, ChunTing Chang, & JiunTai Chen. (2023). ACS Applied Polymer Materials(5). https://doi.org/10.1021/acsapm.3c00422
IEEE [1] ChiaWei Chang, ChiaTi Wu, YuLiang Lin, LinRuei Lee, HuanWei Lin, Bhaskarchand Gautam, YuHsuan Tseng, ChihWei Liao, ChunTing Chang, and JiunTai Chen, ACS Applied Polymer Materials, no. 5, 2023, doi: 10.1021/acsapm.3c00422. keywords: {conductive;crosslinking;photoresponsive;poly(ionic liquid);spiropyran}