WFRF:(Ma Xiaofeng)
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Photo-induced Actuator using Temperature and Light Dual Responsive Azobenzene Containing Ion Gel in Ionic Liquid
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- Ma, Xiaofeng (författare)
- College of Science, Nanjing Forestry University, Nanjing, P. R. China. Institute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. China
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- Lan, Xiaoyu (författare)
- College of Science, Nanjing Forestry University, Nanjing, P. R. China
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- Wu, Linlin (författare)
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, P. R. China
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- College of Science, Nanjing Forestry University, Nanjing, P R. China. Institute of Polymer Materials, Nanjing Forestry University, Nanjing, P. R. China College of Science, Nanjing Forestry University, Nanjing, P. R. China (creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
- Ingår i: European Polymer Journal. - : Elsevier. - 0014-3057 .- 1873-1945. ; 123
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Tribologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Tribology (hsv//eng)
Nyckelord
- ionic liquid
- ion gel
- actuator
- azobenzene
- LCST
- Machine Elements
- Maskinelement
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- European Polymer Journal (Sök värdpublikationen i LIBRIS)
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- Ma, Xiaofeng
- Lan, Xiaoyu
- Wu, Linlin
- Wang, Lei
- Gu, Qun
- Shi, Yijun
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- Gu, Xiaoli
- Luo, Zhenyang
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