Composite elastomers with on-demand convertible phase separations achieve large and healable electro-actuation
Materials Horizons, ISSN: 2051-6355, Vol: 10, Issue: 10, Page: 4501-4509
2023
- 2Citations
- 4Captures
- 1Mentions
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Most Recent News
Zhejiang University Reports Findings in Nanoparticles (Composite elastomers with on-demand convertible phase separations achieve large and healable electro-actuation)
2023 AUG 18 (NewsRx) -- By a News Reporter-Staff News Editor at Nanotech Daily -- New research on Nanotechnology - Nanoparticles is the subject of
Article Description
Phase separation has been widely exploited for fabricating structured functional materials. Generally, after being fabricated, the phase structure in a hybrid material system has been set at a specific length scale and remains unchanged during the lifespan of the material. Herein, we report a strategy to construct on-demand and reversible phase switches among homogenous, nano- and macro-phase separation states in a composite elastomer during its lifespan. We trigger the nanophase separation by super-saturating an elastomer matrix with a carefully selected small-molecule organic compound (SMOC). The nanoparticles of SMOC that precipitate out upon quenching will stretch the elastomer network, yet remain stably arrested in the elastomer matrix at low temperatures for a long time. However, at elevated temperatures, the nano-phase separation will transform into the macro-one. The elastic recovery will drive the SMOC onto the elastomer surface. The phase-separated structures can be reconfigured through the homogeneous solution state at a further elevated temperature. Taking advantage of the reversible phase switches leads to a novel strategy for designing high-performance dielectric elastomers. The in situ formed nanoparticles can boost the electro-actuation performance by eliminating electro-mechanical instability and lead to a very large actuation strain (∼146%). Once the actuator broke down, SMOC could on-demand be driven to the breakdown holes and heal the actuator.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85168830919&origin=inward; http://dx.doi.org/10.1039/d3mh00781b; http://www.ncbi.nlm.nih.gov/pubmed/37551443; https://xlink.rsc.org/?DOI=D3MH00781B; https://dx.doi.org/10.1039/d3mh00781b; https://pubs.rsc.org/en/content/articlelanding/2023/mh/d3mh00781b
Royal Society of Chemistry (RSC)
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