TY - JOUR
T1 - Developing Stretchable and Photo-Responsive Conductive Films by Incorporation of Spiropyran into Poly(ionic liquid)s
AU - Chang, Chia Wei
AU - Wu, Chia Ti
AU - Lin, Yu Liang
AU - Lee, Lin Ruei
AU - Lin, Huan Wei
AU - Gautam, Bhaskarchand
AU - Tseng, Yu Hsuan
AU - Liao, Chih Wei
AU - Chang, Chun Ting
AU - Chen, Jiun Tai
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/6/9
Y1 - 2023/6/9
N2 - 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.
AB - 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.
KW - conductive
KW - crosslinking
KW - photo-responsive
KW - poly(ionic liquid)
KW - spiropyran
UR - http://www.scopus.com/inward/record.url?scp=85162892645&partnerID=8YFLogxK
U2 - 10.1021/acsapm.3c00422
DO - 10.1021/acsapm.3c00422
M3 - Article
AN - SCOPUS:85162892645
SN - 2637-6105
VL - 5
SP - 4210
EP - 4216
JO - ACS Applied Polymer Materials
JF - ACS Applied Polymer Materials
IS - 6
ER -