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Nanocellulose-short peptide self-assembly for improved mechanical strength and barrier performance. | LitMetric

Nanocellulose-short peptide self-assembly for improved mechanical strength and barrier performance.

J Mater Chem B

Laboratory of Supramolecular and Bio-Nanomaterials (SBNLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via L. Mancinelli 7, 20131 Milano, Italy.

Published: September 2024

AI Article Synopsis

  • * This study introduces a noncovalent approach using short peptides to enhance the properties of unfunctionalized CNF, significantly improving their rheological performance even at low concentrations.
  • * The resulting CNF-peptide hybrid films exhibit customizable hydrophobicity and improved water vapor barrier properties, pointing to potential applications in eco-friendly packaging and biomedical devices.

Article Abstract

Cellulose nanofibers (CNF) are the most abundant renewable nanoscale fibers on Earth, and their use in the design of hybrid materials is ever more acclaimed, although it has been mostly limited, to date, to CNF derivatives obtained covalent functionalization. Herein, we propose a noncovalent approach employing a set of short peptides - DFNKF, DF(I)NKF, and DF(F)NKF - as supramolecular additives to engineer hybrid hydrogels and films based on unfunctionalized CNF. Even at minimal concentrations (from 0.1% to 0.01% w/w), these peptides demonstrate a remarkable ability to enhance CNF rheological properties, increasing both dynamic moduli by more than an order of magnitude. Upon vacuum filtration of the hydrogels, we obtained CNF-peptide films with tailored hydrophobicity and surface wettability, modulated according to the peptide content and halogen type. Notably, the presence of fluorine in the CNF-DF(F)NKF film, despite being minimal, strongly enhances CNF water vapor barrier properties and reduces the film water uptake. Overall, this approach offers a modular, straightforward method to create fully bio-based CNF-peptide materials, where the inclusion of DFNKF derivatives allows for facile functionalization and material property modulation, opening their potential use in the design of packaging solutions and biomedical devices.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11342157PMC
http://dx.doi.org/10.1039/d4tb01359jDOI Listing

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