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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Ikkala, Olli Berglund, Lars A. Jin, Hua Zhang, Luhui Seitsonen, Jani Ankerfors, Mikael Ras, Robin H. A. Shi, Enzheng Cao, Anyuan Walther, Andreas |
| Copyright Year | 2013 |
| Abstract | Several approaches have recently been shown for self-assembled biomimetic composite films, aiming at combinations of high toughness, strength, and stiffness. However, it remains challenging to achieve high toughness using simple processes especially for bulk materials. We demonstrate that ionically interacting cationic native nanofibrillated cellulose (C-NFC) and anionic nanoclay, i.e. montmorillonite (MTM), allow local self-assemblies by a simple centrifugation process to achieve 3D bulk materials. The composite with MTM/C-NFC of 63/37 w/w has a high compressive strain to failure of 37% with distinct plastic deformation behaviour, a high work to fracture of 23.1 MJ m−3, and a relatively high compression strength of 76 MPa. Unlike the conventionally used sequential deposition methods to achieve well-defined layers for the oppositely charged units as limited to films, the present one-step method allows quick formation of bulk materials and leads to local self-assemblies, however, having a considerable amount of nanovoids and defects between them. We suggest that the nanovoids and defects promote the plastic deformation and toughness. Considering the simple preparation method and bio-based origin of NFC, we expect that the present tough bulk nanocomposites in compression have potential in applications for sustainable and environmentally friendly materials in construction and transportation. |
| Starting Page | 835 |
| Ending Page | 840 |
| Page Count | 6 |
| File Format | HTM / HTML PDF |
| ISSN | 2050750X |
| Volume Number | 1 |
| Issue Number | 6 |
| Journal | Journal of Materials Chemistry B |
| DOI | 10.1039/c2tb00370h |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | MJ NFC Biomimetics Young's modulus Cellulose Montmorillonite Centrifugation Three-dimensional space Deformation (engineering) Near field communication |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Medicine Materials Science Biomedical Engineering |
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