Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood
Thermo-mechanical densification modifies wood to produce a more dense and resistant lignocellulosic material and may degrade extractives that contribute to the increased susceptibility of wood to attack by xylophagous organisms. This study evaluated the efficiency of tannin extracts of Acacia mearns...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2022-11-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22261 |
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| author | Nídia Niela de Lima Vinícius Resende de Castro Nayara Franzini Lopes Ítalo Lima Nunes Frances Alves Andrade Antonio José Vinha Zanuncio Angélica de Cassia Oliveira Carneiro Solange de Oliveira Araujo |
| author_facet | Nídia Niela de Lima Vinícius Resende de Castro Nayara Franzini Lopes Ítalo Lima Nunes Frances Alves Andrade Antonio José Vinha Zanuncio Angélica de Cassia Oliveira Carneiro Solange de Oliveira Araujo |
| author_sort | Nídia Niela de Lima |
| collection | DOAJ |
| description | Thermo-mechanical densification modifies wood to produce a more dense and resistant lignocellulosic material and may degrade extractives that contribute to the increased susceptibility of wood to attack by xylophagous organisms. This study evaluated the efficiency of tannin extracts of Acacia mearnsii in the treatment of thermo-mechanical densified pine wood in relation to physical, mechanical, and biological resistance (Cryptotermes brevis) properties. Pinus elliottii samples were pretreated with oxalic acid in a Parr reactor, then treated by diffusion in tannin solutions at concentrations 5, 10, and 15%, and finally hot pressed. The apparent density of the modified wood was 87.8% greater than that of the in natura wood (control) with tannins at 15%. The mechanical strength increased, especially the parallel compressive strength, which had an average increase of 169% for the wood with tannins at 10 and 15%, compared with the in natura wood. There was an increase in termite mortality and a reduction in damage for the modified wood treated with 15% tannins, obtaining the best results in mechanical and biological resistance and for the physical parameters. Thermal densification pine wood and preserved with tannin extractives proved to be a potential alternative as a high performance material. |
| first_indexed | 2024-03-13T03:08:05Z |
| format | Article |
| id | doaj.art-9c8b6744e43640dfab9bef85c50cbb95 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-03-13T03:08:05Z |
| publishDate | 2022-11-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-9c8b6744e43640dfab9bef85c50cbb952023-06-26T18:42:35ZengNorth Carolina State UniversityBioResources1930-21262022-11-01181641652263Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified WoodNídia Niela de Lima0Vinícius Resende de Castro1Nayara Franzini Lopes2Ítalo Lima Nunes3Frances Alves Andrade4Antonio José Vinha Zanuncio5Angélica de Cassia Oliveira Carneiro6Solange de Oliveira Araujo7Universidade Federal de ViçosaUniversidade Federal de ViçosaUniversidade Federal de ViçosaUniversidade Federal de ViçosaUniversidade Federal de ViçosaUniversidade Federal de UberlândiaUniversidade Federal de ViçosaUniversity of Lisbon, Instituto Superior de AgronomiaThermo-mechanical densification modifies wood to produce a more dense and resistant lignocellulosic material and may degrade extractives that contribute to the increased susceptibility of wood to attack by xylophagous organisms. This study evaluated the efficiency of tannin extracts of Acacia mearnsii in the treatment of thermo-mechanical densified pine wood in relation to physical, mechanical, and biological resistance (Cryptotermes brevis) properties. Pinus elliottii samples were pretreated with oxalic acid in a Parr reactor, then treated by diffusion in tannin solutions at concentrations 5, 10, and 15%, and finally hot pressed. The apparent density of the modified wood was 87.8% greater than that of the in natura wood (control) with tannins at 15%. The mechanical strength increased, especially the parallel compressive strength, which had an average increase of 169% for the wood with tannins at 10 and 15%, compared with the in natura wood. There was an increase in termite mortality and a reduction in damage for the modified wood treated with 15% tannins, obtaining the best results in mechanical and biological resistance and for the physical parameters. Thermal densification pine wood and preserved with tannin extractives proved to be a potential alternative as a high performance material.https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22261biodeteriorationthermo-mechanical densificationx-ray densitometrypreservativestannins |
| spellingShingle | Nídia Niela de Lima Vinícius Resende de Castro Nayara Franzini Lopes Ítalo Lima Nunes Frances Alves Andrade Antonio José Vinha Zanuncio Angélica de Cassia Oliveira Carneiro Solange de Oliveira Araujo Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood BioResources biodeterioration thermo-mechanical densification x-ray densitometry preservatives tannins |
| title | Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood |
| title_full | Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood |
| title_fullStr | Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood |
| title_full_unstemmed | Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood |
| title_short | Tannin Extracts as a Preservative for Pine Thermo-mechanically Densified Wood |
| title_sort | tannin extracts as a preservative for pine thermo mechanically densified wood |
| topic | biodeterioration thermo-mechanical densification x-ray densitometry preservatives tannins |
| url | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22261 |
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