• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Wood and Fiber Science >TREATMENT OF WOOD WITH POLYSILICIC ACID DERIVED FROM SODIUM SILICATE FOR FUNGAL DECAY PROTECTION1
【24h】

TREATMENT OF WOOD WITH POLYSILICIC ACID DERIVED FROM SODIUM SILICATE FOR FUNGAL DECAY PROTECTION1

机译：用硅酸钠衍生的多聚酸处理木材，用于真菌的腐烂保护1

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this study was to investigate safer, more inexpensive chemicals derived from sodium silicate that can be used to protect wood against fungal degradation. Desiccant and surfactant properties of sodium silicate-derived products have been usedsince the early 19th century and may find application for wood decay protection. In our study, wood was impregnated with 19.5% sodium silicate and acidified with 2.5% phosphoric acid for 2 da to produce polysilicic acid. After 2-wk daily water leaching,leached specimens had 0.2% weight loss by a brown-rot fungus, Gloeophyllum trabeum, and weight losses of 3.4 - 5.2% by a white-rot fungus, Trametes versicolor. The control had 32.2 and 30.2% weight losses by G. trabeum and T. versicolor, respectively. Energy-dispersive X-ray analysis showed that polysilicic acid deposited mainly in the cell lumens. Exposure at 90% RH showed that polysilicic acid-treated loblolly pine or sweet gum that had been water-leached with 22 - 34% chemical retention absorbed more moisture than untreated wood. This indicated that decay resistance of polysilicic acid-treated wood is caused by a different mechanism than desiccation. One possible mechanism may be attributed to direct disruption of permeability of fungal cell membranes by the low-molecular-weight polysilicic acid.
机译：这项研究的目的是研究可用于保护木材免受真菌降解的更安全，更便宜的源自硅酸钠的化学物质。自19世纪初期以来，就一直使用硅酸钠衍生产品的干燥剂和表面活性剂特性，并可能在木材防腐中得到应用。在我们的研究中，木材用19.5％的硅酸钠浸渍，并用2.5％的磷酸酸化2天以产生聚硅酸。每天淋水2周后，沥滤样品的褐腐真菌Gloeophyllum trabeum的失重为0.2％，白腐真菌Trametes versicolor的失重为3.4-5.2％。对照通过小白曲霉和杂色革霉的重量损失分别为32.2％和30.2％。能量色散X射线分析表明，聚硅酸主要沉积在细胞腔中。在90％相对湿度下的暴露表明，经过聚硅酸处理的水松和甜口香糖经过水浸处理后具有22-34％的化学保留率，比未处理的木材吸收更多的水分。这表明经聚硅酸处理的木材的耐腐性是由与干燥不同的机理引起的。一种可能的机制可能归因于低分子量聚硅酸直接破坏了真菌细胞膜的通透性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号