Improving Properties of Particleboards with Reduced Density
| Autor: | Nicolae Badin, Marius Catalin Barbu, Bogdan Bedelean, Mihaela Campean, Karoly Lengyel |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Absorption (acoustics) Environmental Engineering Materials science Softwood Formaldehyde Bioengineering Young's modulus 02 engineering and technology Raw material 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound symbols.namesake Flexural strength chemistry 010608 biotechnology medicine Hardwood symbols Composite material Swelling medicine.symptom 0210 nano-technology Waste Management and Disposal |
| Zdroj: | BioResources. 13 |
| ISSN: | 1930-2126 |
| DOI: | 10.15376/biores.13.1.1289-1302 |
| Popis: | The goal of this research was to examine factors affecting the feasibility of manufacturing particleboards at significantly lower density, while reducing the formaldehyde emissions. A further goal was to not significantly affect other important physical and mechanical properties of the boards, including swelling in thickness, surface absorption, bending strength, modulus of elasticity, internal bond, and surface soundness. By varying the raw material recipe (ratio between hardwood and softwood chips), it was found that increasing the amount of hardwood chips led to a significant decrease of the formaldehyde emissions, but also to a significant increase of the thickness swelling and surface absorption. The simple density reduction of particleboards was not a viable alternative because all properties were seriously affected. Therefore, the tests on particleboards with reduced density were repeated, but this time an isocyanate-based additive was added into the recipe at 0.25% and 0.4%. A noticeable improvement of all analyzed properties was achieved. |
| Databáze: | OpenAIRE |
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