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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Frontiers of Materials Award Symposium: Functional Composition Control of Surface Mechanics in Soft, Water-swollen Gels
Presentation Title Controlling Lubricity of Interfaces with Charged Hydrogels
Author(s) Rosa M. Espinosa-Marzal
On-Site Speaker (Planned) Rosa M. Espinosa-Marzal
Abstract Scope With recent developments in soft robotics, novel stimuli-responsive materials are desired for controlling interfacial forces. Hydrogels have been a topic of interest in biotribology for decades due to their biocompatibility, extremely low coefficients of friction, and chemical functional groups similar to those present in biological tribosystems. This work describes several strategies for modulating the balance between physical interactions in the polymer network –via pH, temperature, electrostatic potential, or salt concentration– and thereby, to control the microstructure. Microstructural variations alter the gel’s contact mechanics and thereby friction and/or adhesion in situ.
Proceedings Inclusion? Planned: None Selected


Contact Mechanics of Soft Hydrated Materials
Controlling Lubricity of Interfaces with Charged Hydrogels
Friction of Thin Hydrogel Films: Disentangling the Contributions of Poroelastic Flow and Interface Molecular Interactions
Hydrogel Structure and Surface Physics
Soft Surface Layers on Swollen Gels Mediate Their Contact and Sliding Mechanics

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