Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging

Qing Chen; Benedikt Sochor; Andrei ChumakovMarie BetkerNils M. UlrichMaria E. Toimil-MolaresKorneliya GordeyevaL. Daniel SoederbergStephan V. Roth

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Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging

机译：Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging

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Biomimetic actuators are promising candidates for smart soft robotics. Theapplications of state-of-the-art actuators require the combination of programmablestimuli-responsiveness, excellent robustness, and efficient self-healingability in a wide-range of working conditions. However, these properties maybe mutually exclusive. Inspired by biological tissues, two kinds of polyelectrolytesincluding polyvinyl alcohol (PVA) and polystyrene sulfonate (PSS) areexploited as the fillers of cellulose nanofibrils (CNFs) for the fabrication ofthe CNF/PVA/PSS (CAS) film via the assembly of the physically-crosslinkednetwork through multiple H-bonding and electrostatic interactions. Achievedby a casting-evaporation strategy, internal stress is stored within the polymermatrix and transforms into reversible anisotropic bending deformationsin response to a humidity gradient. The speed, direction, and pitch of thebending can be programmed by tailoring the internal stresses and geometryof the samples. Moreover, the H-bonded network also contributes to theeffective energy dissipation toward high toughness during tensile stretching,as well as self-healing ability during moisture saturation of the CAS films.This enables the fabrication of a humidity-sensitive flower-shaped actuatorand self-healable packaging paper. This study presents a biomimetic strategyfor the fabrication of multi-functional soft robotics, which holds great promisefor applications in the fields of biosensors and smart packaging.

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《Advanced functional materials》 |2022年第49期|2208074.1-2208074.17|共17页
作者
Qing Chen; Benedikt Sochor; Andrei ChumakovMarie BetkerNils M. UlrichMaria E. Toimil-MolaresKorneliya GordeyevaL. Daniel SoederbergStephan V. Roth;
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作者单位

Deutsches Elektronen-Synchrotron DESYNotkestr. 85, 22607 Hamburg, Germany;

Deutsches Elektronen-Synchrotron DESYNotkestr. 85, 22607 Hamburg, Germany Department of Fibre and Polymer TechnologyKTH Royal Institute of TechnologyTeknikringen 56–58, 10044 Stockholm, Sweden;

Materials Research DepartmentGSI Helmholtz CenterPlanckstr. 1, 64291 Darmstadt, GermanyDepartment of Fibre and Polymer TechnologyKTH Royal Institute of TechnologyTeknikringen 56–58, 10044 Stockholm, SwedenDepartment of Fibre and Polymer TechnologyKTH Royal Institute of TechnologyTeknikringen 56–58, 10044 Stockholm, Sweden Wallenberg Wood Science CenterKTH Royal Institute of TechnologyTeknikringen 52, 10044 Stockholm, Sweden;

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actuations; healing; humidity responses; stretching; toughness;

Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging

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