Cellulose nanofiber board
| Autor: | Sona Azad, Mahdi Mashkour, Hossein Yousefi, Abolghasem Khazaeian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences A36 steel 0104 chemical sciences chemistry.chemical_compound Cellulose fiber Vacuum furnace chemistry Flexural strength Nanofiber Ultimate tensile strength Materials Chemistry engineering Adhesive Cellulose Composite material 0210 nano-technology |
| Zdroj: | Carbohydrate polymers. 187 |
| ISSN: | 1879-1344 |
| Popis: | A cellulose nanofiber board (CNF-board) with a nominal thickness of 3 mm was fabricated without adhesive or additive. To provide comparison, a cellulose fiber board (CF-board) was also fabricated. A novel cold pre-press apparatus was made to dewater highly absorbent CNF gel prior to drying. A mild drying condition in the vacuum oven at 70 °C and 0.005 MPa was enough to provide the CNF-board with a density of 1.3 g/cm3 thanks to its self-densification capability. Unlike the CF-board, the fabricated CNF-board had a high water-activated dimensional recovery ratio (averagely 96%) during the five cyclic wetting-drying process. The flexural and tensile strengths of CNF-board obtained were 162 MPa and 85 MPa, respectively. The corresponding values for CF-board were 28 MPa and 11 MPa, respectively. The specific flexural and tensile strengths of CNF-board obtained were higher than those of CF-board as well as some other traditional wood-based composites, polymers and structural ASTM A36 steel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect