Photo-induced Actuator using Temperature and Light Dual Responsive Azobenzene Containing Ion Gel in Ionic Liquid

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Ma, XiaofengCollege of Science, Nanjing Forestry University, Nanjing, P. R. China. Institute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. China (author)

Photo-induced Actuator using Temperature and Light Dual Responsive Azobenzene Containing Ion Gel in Ionic Liquid

Article/chapterEnglish2020

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Elsevier,2020
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LIBRIS-ID:oai:DiVA.org:ltu-77247
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77247URI
https://doi.org/10.1016/j.eurpolymj.2019.109446DOI

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Language:English
Summary in:English

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Validerad;2020;Nivå 2;2020-01-13 (johcin)
A series of well-defined random copolymers comprising butyl acrylate (BA) and 4-phenylazophenylmethacrylate (AzoMA) (P(AzoMA-r-BA)) are prepared successfully by reversible addition fragmentation chain transfer (RAFT) polymerization. P(AzoMA-r-BA)s show LCST-type phase transition in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfone)amide ([C4mim][NTf2]). LCST depends on the photoisomerization state of azobenzene, as well as on the AzoMA composition in the random copolymers. LCST of (P(cis-AzoMA-r-BA) is significantly higher than that of P(trans-AzoMA-r-BA), because cis-AzoMA and trans-AzoMA behave as solvato-philic and solvato-phobic comonomer, respectively. At a bistable temperature, photo-induced phase separation is completely reversible. Secondly, based on this phenomenon, a thermo- / photo- responsive ion gel (BA-AzoMA ion gel) can be prepared by free radical polymerization of BA and AzoMA using ethylene glycol dimethacrylate (EGDMA) as crosslinker in [C4mim][NTf2]. BA-AzoMA ion gel shows high temperature contraction and low temperature expansion behavior, due to LCST-type phase behavior of polymer system consisting of AzoMA and BA. Contraction temperature of BA-AzoMA ion gel depends on photoisomerization state of the azobenzene group in polymers. At a bistable temperature, photo-induced expansion-contraction is reversible. Finally, a Photo-induced actuator can be realized using BA-AzoMA ion gel at suitable temperatures, featuring reversible bending by alternate irradiating with visible and UV light. The bending behavior is also demonstrated.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Maskinteknik Tribologi hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Tribology hsv//eng
ionic liquid
ion gel
actuator
azobenzene
LCST
Machine Elements
Maskinelement

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Lan, XiaoyuCollege of Science, Nanjing Forestry University, Nanjing, P. R. China (author)
Wu, LinlinCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing, P. R. China (author)
Wang, LeiInstitute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. China (author)
Gu, QunChemistry Department, Edinboro University of Pennsylvania, Edinboro PA, USA (author)
Shi, YijunLuleå tekniska universitet,Maskinelement(Swepub:ltu)yijshi (author)
Gu, XiaoliCollege of Chemical Engineering, Nanjing Forestry University, Nanjing, P. R. China (author)
Luo, ZhenyangCollege of Science, Nanjing Forestry University, Nanjing, P. R. China. Institute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. China (author)
College of Science, Nanjing Forestry University, Nanjing, P. R. China. Institute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. ChinaCollege of Science, Nanjing Forestry University, Nanjing, P. R. China (creator_code:org_t)

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In:European Polymer Journal: Elsevier1230014-30571873-1945

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By the author/editor: Ma, Xiaofeng; Lan, Xiaoyu; Wu, Linlin; Wang, Lei; Gu, Qun; Shi, Yijun; show more...; Gu, Xiaoli; Luo, Zhenyang; show less...

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Tribology

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