Aqueous methylcellulose is an “abnormal” inverse-freezing fluid, which gelates when heated. We ventured to stimulate this phase-transition by mechanical impact, whose resulting shockwaves and local heat could be uptaken by the endothermic gelation. High-speed photography was used to observe this transition in microsecond timescales. This phenomenon enables attenuation of shockwaves.
G. Parvari, Y. Rotbaum, Y. Eichen and D. Rittel, Chem. Commun., 2018, 54, 12578 DOI: 10.1039/C8CC06378H
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