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Programmable nanocomposites of cellulose nanocrystals and zwitterionic hydrogels for soft robotics. | LitMetric

AI Article Synopsis

  • Stimuli-responsive hydrogels are versatile materials that can change shape and properties, making them useful for soft robotics.
  • The study reports the creation of pH-responsive hydrogel nanocomposites that are self-healing and have programmed shapes, made primarily from zwitterionic monomers and cellulose nanocrystals.
  • These hydrogels were used to create soft robots capable of transporting light cargo, highlighting their potential for use in future biomedical applications.

Article Abstract

Stimuli-responsive hydrogels have garnered significant attention as a versatile class of soft actuators. Introducing anisotropic properties, and shape-change programmability to responsive hydrogels promises a host of opportunities in the development of soft robots. Herein we report the synthesis of pH-responsive hydrogel nanocomposites with predetermined microstructural anisotropy, shape-transformation, and self-healing. Our hydrogel nanocomposites are largely composed of zwitterionic monomers and asymmetric cellulose nanocrystals. While the zwitterionic nature of the network imparts both self-healing and cytocompatibility to our hydrogel nanocomposites, the shear-induced alignment of cellulose nanocrystals renders their anisotropic swelling and mechanical properties. Thanks to the self-healing properties, we utilized a cut-and-paste approach to program reversible, and complex deformation into our hydrogels. As a proof-of-concept, we demonstrated the transport of light cargo using tethered and untethered soft robots made from our hydrogels. We believe the proposed material system introduce a powerful toolbox for the development of future generations of biomedical soft robots.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10542366PMC
http://dx.doi.org/10.1038/s41467-023-41874-7DOI Listing

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