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Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology
Published on: July 20, 2016
Cellulose nanopaper structures of high toughness
Marielle Henriksson1, Lars A Berglund, Per Isaksson
1Fibre and Polymer Technology, Royal Institute of Technology, KTH, SE-100 44 Stockholm, Sweden.
Biomacromolecules
|May 24, 2008
Summary
Porous cellulose nanopaper made from wood nanofibrils exhibits exceptional toughness. Its mechanical properties depend on porosity and nanofibril molar mass, indicating potential for advanced material applications.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Cellulose nanofibrils (CNFs) present significant potential as advanced fibrous materials.
- CNFs offer mechanical performance surpassing conventional plant fibers used commercially.
Purpose of the Study:
- To prepare and characterize porous cellulose nanopaper using wood nanofibrils.
- To investigate the structure-property relationships governing the mechanical performance of these nanopapers.
Main Methods:
- Preparation of nanopapers with varying porosities from CNFs of different molar masses.
- Uniaxial tensile testing to evaluate mechanical properties.
- Analysis of structure-property correlations.
Main Results:
- Highly porous nanopapers demonstrated remarkable toughness, linked to their nanofibrillar network structure.
- Nanopaper strength correlated with nanofibril molar mass, suggesting nanofibril fracture as a key factor in ultimate strength.
- Large strain-to-failure indicated that interfibril slippage contributes to inelastic deformation alongside nanofibril deformation.
Conclusions:
- Wood-derived cellulose nanopaper exhibits high toughness, particularly at high porosities.
- Nanofibril molar mass is a critical determinant of tensile strength.
- The material's deformation mechanisms involve both nanofibril integrity and interfibril interactions.
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