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In-Situ Swelling-Gated Chemical Sensing Actuator

46 Pages Posted: 18 Nov 2019 Sneak Peek Status: Review Complete

See all articles by Fushun Wang

Fushun Wang

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

Baoguo Chen

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

Lei Wu

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

Qiuhua Zhao

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

Lidong Zhang

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

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Abstract

Stimuli-responsive elastic organogels have a potential for functional sensors and actuators. However, it remains a challenge to prepare an organogel actuator that can be driven by in-situ swelling to generate controlled shape morphing and maintain its kinematic activities even having been saturated with organic solvents. We herein report a robust elastic organogel that is synthesized through ring-opening polymerization of a long chain epoxide monomer into a crosslinking fluoro-network (CFN). The structure results in the organogel being capable of absorbing polar organic solvents (maximum swellability: 178±10%) and generating indefatigable shape morphing, even in a solvent-saturated state. The CFN organogel is resistant to strong acid/alkali solutions (treating with 2M HCl and NaOH at 60 °C for 20 h), and high temperatures (heating at 250 °C for 5 min) without losing its responsiveness to organic solvents. It is also stretchable (strain, 130%), robust (stress, 7.0 MPa), and elastic, and can keep these properties after treatment in harsh conditions. Importantly, the CFN organogel is capable of in-situ swelling (no diffusion) by organic droplets to induce shape morphing in a controllable manner, which is devoid of the assistance of any structural designs such as surface patterning, bilayer structures and origamis. The single-layered CFN organogel deforms from two- to three-dimensional geometries only through the in-situ swelling of organic droplets at appropriate positions over the organogel surface. A series of kinematics tests demonstrate that the CFN organogel has a potential for chemical sensing devices.

Keywords: smart materials, in-situ swelling response, crosslinking reaction, elastic robust organogels, chemical sensing actuators

Suggested Citation

Wang, Fushun and Chen, Baoguo and Wu, Lei and Zhao, Qiuhua and Zhang, Lidong, In-Situ Swelling-Gated Chemical Sensing Actuator (November 18, 2019). Available at SSRN: https://ssrn.com/abstract=3489450 or http://dx.doi.org/10.2139/ssrn.3489450
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Fushun Wang

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

China

Baoguo Chen

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

China

Lei Wu

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

China

Qiuhua Zhao

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering

China

Lidong Zhang (Contact Author)

East China Normal University (ECNU) - School of Chemistry and Molecular Engineering ( email )

China

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