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Assembly of Anisotropic Nanocellulose Films Stronger than the Original Tree
- Source :
- ACS Nano, ACS Nano, American Chemical Society, 2020, 14, pp.16525-16534. ⟨10.1021/acsnano.0c01372⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; Natural structural materials frequently consist of multimaterial nanocomposites with complex superstructure giving rise to exceptional mechanical properties, but also commonly preventing access to their synthetic reproduction. Here we present the spin-assisted layer-by-layer assembly of anisotropic wood-inspired films composed of anionic cellulose nanofibrils and cationic poly(vinyl amine) possessing a tensile strength that exceeds that of the wood from which the fibers originate. The degree of orientation of the nanofibrils was studied by atomic force microscopy and depends strongly on the distance from the center of the spun surface. The nanofibrils are preferentially aligned in the direction of the shear flow, and consequently, the mechanical properties of such films differ substantially when measured parallel and perpendicular to the fibril orientation direction. For enabling a diversity of bioinspired applications including sensing, packaging, electronics, or optics, the preparation of nanocomposite materials and devices with anisotropic physical properties requires an extreme level of control over the positioning and alignment of nanoscale objects within the matrix material.
- Subjects :
- Materials science
spin-assisted LbL assembly
General Physics and Astronomy
02 engineering and technology
010402 general chemistry
01 natural sciences
Nanocellulose
Ultimate tensile strength
Perpendicular
General Materials Science
nanoreinforcement
Composite material
Anisotropy
Nanoscopic scale
Superstructure
wood-inspired composites
Structural material
Nanocomposite
ultrastrong materials
General Engineering
cellulose nanofibrils
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
0104 chemical sciences
Metrics & More Article Recommendations anisotropic films
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 19360851
- Database :
- OpenAIRE
- Journal :
- ACS Nano, ACS Nano, American Chemical Society, 2020, 14, pp.16525-16534. ⟨10.1021/acsnano.0c01372⟩
- Accession number :
- edsair.doi.dedup.....3cf80edfb265711cd21743837c90de4b