| Journal: | Maderas : ciencia y tecnología |
| Database: | |
| System number: | 000534527 |
| ISSN: | 0718-221X |
| Authors: | Couto da Silva, Bruno1 Trevisan, Henrique2 Garcia, Rosilei Aparecida2 |
| Institutions: | 1Federal Rural University of Rio de Janeiro Forest Institute Department of Forest Products, Seropédica. Brasil 2Federal Rural University of Rio de Janeiro Forest Institute Department of Forest Products, Seropédica. Brasil |
| Year: | 2020 |
| Volumen: | 22 |
| Number: | 4 |
| Pages: | 569-576 |
| Country: | Chile |
| Language: | Inglés |
| English abstract | This study aimed to investigate the effect of thermal modification and nano-zinc oxide (nano-ZnO) particle impregnation on the deterioration of Caribbean pine wood under field conditions. Samples were thermally-modified at various temperature levels (control, 180 °C, 200 °C, and 220 °C). Nano-ZnO impregnation was done with an aqueous solution at 1,5 % in an autoclave under two-steps of pressure and vacuum. Unmodified and thermally-modified, non-impregnated and nano-ZnO impregnated samples were exposed to deterioration for five months in field tests. A deterioration index was used to evaluate the health condition of the samples. The mass loss and occurrence of termite tunnels in percentage were also determined. The nano-ZnO impregnation improved the resistance of unmodified wood to field-deterioration. The thermal modification at 180oC, and 200ºC increased the wood deterioration and nano-ZnO impregnation did not improve their resistance. Unmodified and 220 ºC modified samples had a lower mass loss by xylophages than other thermal treatments regardless of the nanoparticle impregnation. The nano-ZnO impregnation decreases the occurrence of termite tunnels in unmodified, 200 ºC and 220 ºC-modified samples. |
| Keyword: | Deterioration index, Mass loss, Nano-zinc oxide particle, Termite tunnels, Wood deterioration. |
| Full text: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
