Cellulose crystals plastify by localized shear

Molnár, Gergely; Rodney, David; Martoïa, F.; Dumont, Pierre; Nishiyama, Yoshiharu; Mazeau, K.; Orgéas, Laurent

doi:10.1073/pnas.1800098115

Cited by 45 publications

(29 citation statements)

References 52 publications

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“…This is surprising as especially short CNCs are often considered as rigid and straight bodies thanks to their high axial elastic modulus. However, as recently reported, based on computational simulations, 34,35 cellulose crystals can be considered as flexible in their transverse and diagonal directions, which may lead to crystals deformation in such a waving manner along their axes.…”

Section: Discussionmentioning

confidence: 81%

Electron microdiffraction reveals the nanoscale twist geometry of cellulose nanocrystals

Ogawa

2019

Nanoscale

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Section: Discussionmentioning

confidence: 81%

Electron microdiffraction reveals the nanoscale twist geometry of cellulose nanocrystals

Ogawa

2019

Nanoscale

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“…Indeed, recent simulations have suggested that plastic deformations due to high shear may occur even in crystalline cellulose. [ 71 ]…”

Section: Recent Progress In the Fundamental Understanding Of Nanocellmentioning

confidence: 99%

Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications

et al. 2020

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In the effort toward sustainable advanced functional materials, nanocelluloses have attracted extensive recent attention. Nanocelluloses range from rod‐like highly crystalline cellulose nanocrystals to longer and more entangled cellulose nanofibers, earlier denoted also as microfibrillated celluloses and bacterial cellulose. In recent years, they have spurred research toward a wide range of applications, ranging from nanocomposites, viscosity modifiers, films, barrier layers, fibers, structural color, gels, aerogels and foams, and energy applications, until filtering membranes, to name a few. Still, nanocelluloses continue to show surprisingly high challenges to master their interactions and tailorability to allow well‐controlled assemblies for functional materials. Rather than trying to review the already extensive nanocellulose literature at large, here selected aspects of the recent progress are the focus. Water interactions, which are central for processing for the functional properties, are discussed first. Then advanced hybrid gels toward (multi)stimuli responses, shape‐memory materials, self‐healing, adhesion and gluing, biological scaffolding, and forensic applications are discussed. Finally, composite fibers are discussed, as well as nanocellulose as a strategy for improvement of photosynthesis‐based chemicals production. In summary, selected perspectives toward new directions for sustainable high‐tech functional materials science based on nanocelluloses are described.

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“…Then, the following large strain would trigger the deformation of the CNF network at microscale and even the shear behavior of cellulose nanocrystals at nanoscale. Recent simulation studies demonstrated that breaking and reformation of interfiber hydrogen bonds as well as the dihedral rotation are nonnegligible mechanisms in the origin of outstanding mechanical properties of cellulose nanocrystals (38,39). At last, the larger compression strain re sults in the densification of CNFP (CNF network at microscale).…”

Section: Impact Resistancementioning

confidence: 99%

Lightweight, tough, and sustainable cellulose nanofiber-derived bulk structural materials with low thermal expansion coefficient

et al. 2020

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Sustainable structural materials with light weight, great thermal dimensional stability, and superb mechanical properties are vitally important for engineering application, but the intrinsic conflict among some material properties (e.g., strength and toughness) makes it challenging to realize these performance indexes at the same time under wide service conditions. Here, we report a robust and feasible strategy to process cellulose nanofiber (CNF) into a high-performance sustainable bulk structural material with low density, excellent strength and toughness, and great thermal dimensional stability. The obtained cellulose nanofiber plate (CNFP) has high specific strength [~198 MPa/(Mg m−3)], high specific impact toughness [~67 kJ m−2/(Mg m−3)], and low thermal expansion coefficient (<5 × 10−6 K−1), which shows distinct and superior properties to typical polymers, metals, and ceramics, making it a low-cost, high-performance, and environmental-friendly alternative for engineering requirement, especially for aerospace applications.

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Cellulose crystals plastify by localized shear

Cited by 45 publications

References 52 publications

Electron microdiffraction reveals the nanoscale twist geometry of cellulose nanocrystals

Electron microdiffraction reveals the nanoscale twist geometry of cellulose nanocrystals

Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications

Lightweight, tough, and sustainable cellulose nanofiber-derived bulk structural materials with low thermal expansion coefficient

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