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Polymers 2017, 9(11), 554; doi:10.3390/polym9110554

Experimental Evidence of Large Amplitude pH Mediated Autonomous Chemomechanical Oscillation

1,* , 1
2,* and 3
Department of Chemistry, Capital Normal University, Beijing 100048, China
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Xi’an Satellite Control Center, Xi’an 710043, China
Co-first author.
Authors to whom correspondence should be addressed.
Received: 29 September 2017 / Revised: 23 October 2017 / Accepted: 25 October 2017 / Published: 25 October 2017
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Large amplitude autonomous chemomechanical oscillations were observed in a coupled system consisting of a porous pH-responsive hydrogel and a bromate-sulfite-manganese (II) pH oscillatory reaction. The porous structure effectively improves the chemomechanical response speed, and the negative feedback species of the bulk oscillation Mn2+ takes part in the coupling by forming complex and physical crosslinks with the responsive group in the gel. It strengthens the porous gel by forming additional networks, which may contribute to sustaining the long-lasting chemomechanical oscillation. Additionally, the interaction between Mn2+ and the hydrogel alters the period of the oscillatory reaction due to its binding competition with H+, the positive feedback species. View Full-Text
Keywords: autonomous chemomechanical system; pH responsive hydrogel autonomous chemomechanical system; pH responsive hydrogel

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, X.; Zhou, Y.; Ji, L.; Ding, Y.; Wang, J.; Liang, X. Experimental Evidence of Large Amplitude pH Mediated Autonomous Chemomechanical Oscillation. Polymers 2017, 9, 554.

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