2018
DOI: 10.1038/s41563-018-0175-5
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Interparticle hydrogen bonding can elicit shear jamming in dense suspensions

Abstract: Dense suspensions of hard particles in a liquid can exhibit strikingly counter-intuitive behavior, such as discontinuous shear thickening (DST) [1,2,3,4,5,6,7,8] and reversible shear jamming (SJ) into a state with finite yield stress [9,10,11,12,13]. Recent studies identified a stress-activated crossover from hydrodynamic interactions to frictional particle contacts to be key for these behaviors [2,3,4,6,7,8,10,14]. However, many suspensions exhibit only DST and not SJ. Here we show that particle surface chemi… Show more

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Cited by 112 publications
(101 citation statements)
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“…Figure These results allow us to pinpoint urea sorption as the driving factor in the reduction of interparticle friction and adhesion, and in turn the shifted SJ regime reported in prior work. 13 We emphasize the reversible nature of this adhesion generated by particle-particle hydrogen bonds, since aggregation and shear thinning would overwhelm the rheological response and result in a yielding-to-jamming transition, as recently predicted by numerical simulations. 25 In conclusion, we have presented direct evidence that chemical processes at the particle surfaces and their kinetics influence the interparticle friction and adhesion that drive the macroscopic flow behavior in dense suspensions, specifically shear jamming.…”
supporting
confidence: 61%
“…Figure These results allow us to pinpoint urea sorption as the driving factor in the reduction of interparticle friction and adhesion, and in turn the shifted SJ regime reported in prior work. 13 We emphasize the reversible nature of this adhesion generated by particle-particle hydrogen bonds, since aggregation and shear thinning would overwhelm the rheological response and result in a yielding-to-jamming transition, as recently predicted by numerical simulations. 25 In conclusion, we have presented direct evidence that chemical processes at the particle surfaces and their kinetics influence the interparticle friction and adhesion that drive the macroscopic flow behavior in dense suspensions, specifically shear jamming.…”
supporting
confidence: 61%
“…t r becomes important in modelling the flow properties whenever the suspension comes close to jamming and the shear rate drops. With our protocol for extracting this relaxation time, future work should be able to clarify the underlying physical mechanism, which may include particle softness [40], surface chemistry [41] or long-range repulsion [42].…”
mentioning
confidence: 99%
“…Here, we propose that hydrated and cellular-scale granular materials can enable multiscale tissuelike behaviors in synthetic materials. Due to strong intergranular interactions, dense suspensions of granular materials dynamically respond to external stress through rapid phase transformations (47)(48)(49). When integrated with synthetic hydrogel networks ( Fig.…”
Section: Introductionmentioning
confidence: 99%