Mechanoresponsive resonance differences in double-network hydrogels towards multipartite dynamics

Xing, Ziyu, Li, Peizhao, Lu, Haibao and Fu, Richard (2021) Mechanoresponsive resonance differences in double-network hydrogels towards multipartite dynamics. Journal of Physics D: Applied Physics, 54 (46). p. 465301. ISSN 0022-3727

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Unlike single-network hydrogel whose thermodynamic equilibrium of all phases is governed by one single rule, double-network (DN) hydrogel is incorporated of two coexisting phases, which are separated from each other due to the differences in their mechanoresponsive responses. However, the resonance differences and multipartite dynamics of coexisting phases in these DN hydrogels have not been fully understood. This paper reports a new methodology to use a rheological model in combination of Arrhenius principle and Kirkwood approximation, to characterize the differences in mechanoresponsive resonances and viscoelastic behaviors of coexisting phases in the DN hydrogel. Their multipartite dynamics has been identified to originate from mechanical stretching, mechanochemical coupling and chemical kinetics of the ductile network, original brittle network and self-healed brittle network, respectively. Furthermore, molecular dynamics simulation and finite-element analysis have been conducted to verify the proposed model and explore the toughening mechanism, which is determined not only by the mechanochemical coupling, but also by the self-healing kinetics. Finally, effectiveness of proposed model has been well verified using the experimental results of DN hydrogels reported in literature.

Item Type: Article
Additional Information: Funding information: This work was financially supported by the National Natural Science Foundation of China (NSFC) under Grant No. 11725208, and International Exchange Grant (IEC/NSFC/201078), through Royal Society and NFSC.
Uncontrolled Keywords: double-network, hydrogel, coexisting phases, resonance difference
Subjects: F300 Physics
H800 Chemical, Process and Energy Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 18 Aug 2021 13:33
Last Modified: 27 Aug 2022 08:00

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