High-performance imitation precious wood from low-cost poplar wood via high-rate permeability of phenolic resins
| Autor: | Aibin Zhang, Jiongjiong Li, Wei Zhang, Jianzhang Li, Shifeng Zhang, Hui Chen, Qiang Gao |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Materials science Polymers and Plastics technology industry and agriculture Formaldehyde 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Contact angle chemistry.chemical_compound chemistry Pulmonary surfactant 010608 biotechnology Desorption Materials Chemistry Ceramics and Composites Molar mass distribution Phenol Wetting Composite material 0210 nano-technology Mass fraction |
| Zdroj: | Polymer Composites. 39:2431-2440 |
| ISSN: | 0272-8397 |
| DOI: | 10.1002/pc.24226 |
| Popis: | Precious wood has high performances, but has limited availability, increasingly rising cost, and requires a long growth cycle. Imitation precious wood was prepared from low-cost and fast-growing poplar wood using the method of wood polymer composites (WPCs). Poplar wood was impregnated with phenol formaldehyde (PF) resins in the presence of surfactants as osmotic agents to achieve efficient PF permeability. The effects of formaldehyde/phenol (F/P) molar ratio, surfactant type, and surfactant amount on the performances of PF resins and the modified woods were investigated in detail. The wetting process of PF resins on wood surface and its molecular weight distribution were observed by contact angle measurement and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS), respectively. The physical and mechanical properties of the resultant WPCs were also evaluated. The poplar wood treated with PF-DTAB-0.8% resin (F/P = 1.6) exhibited lower viscosity (23.9 mPa s), lower molecular distribution and better permeability. The weight percent gains (WPG) of the treated material reached 104.82%, and its hardness reached 66.86 shore D. overall, this approach has the potential to make a wood product that can partially substitute for precious wood. POLYM. COMPOS., 2016. © 2016 Society of Plastics Engineers |
| Databáze: | OpenAIRE |
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