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Non-biocidal preservation of wood against brown-rot fungi with a TiO2/Ce xerogel
Green Chemistry ( IF 9.3 ) Pub Date : 2018-02-09 00:00:00 , DOI: 10.1039/c7gc03751a Huizhang Guo 1, 2, 3, 4, 5 , Erik Valentine Bachtiar 1, 2, 3, 4, 5 , Javier Ribera 5, 6, 7, 8 , Markus Heeb 5, 6, 7, 8 , Francis W. M. R. Schwarze 5, 6, 7, 8 , Ingo Burgert 1, 2, 3, 4, 5
Green Chemistry ( IF 9.3 ) Pub Date : 2018-02-09 00:00:00 , DOI: 10.1039/c7gc03751a Huizhang Guo 1, 2, 3, 4, 5 , Erik Valentine Bachtiar 1, 2, 3, 4, 5 , Javier Ribera 5, 6, 7, 8 , Markus Heeb 5, 6, 7, 8 , Francis W. M. R. Schwarze 5, 6, 7, 8 , Ingo Burgert 1, 2, 3, 4, 5
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The use of wood as an eco-friendly building material requires the development of environmentally benign wood preservatives, which are ideally non-toxic during and after the service life. However, too little is known about the protection of wood against wood decay fungi using non-biocidal methods, and as a result, simple but effective methods that increase the service life without environmental or health risks are still rare. A novel wood protection method is described that is based on a titanium isopropoxide gel, and cerium(IV) ammonium nitrate, as a stabilizer for the treatment of wood. The hydrolysis of titanium isopropoxide is initiated by the OH-groups of wood, as well as the moisture in the wood cell wall, and subsequently results in a cerium-doped TiO2 layer, which not only seals the wood surface from direct exposure to hydrolytic enzymes but also occludes the micro/nano-pores of the wood cells. The cerium dopant acts as a radical scavenger that quenches the hydroxyl radicals in the initial stage. Our studies revealed that Norway spruce wood can be better protected against wood decay by Gloeophyllum trabeum, Rhodonia placenta and Coniophora puteana. The TiO2/Ce xerogel coating also improves resistance against weathering, as modified specimens showed good anti-fungal properties even after accelerated weathering treatments. This novel wood protection method provides a greener and safer alternative to traditional biocidal wood preservatives and has the potential to extend the service life of wood materials particularly in outdoor applications as well as for archaeological wood conservation.
中文翻译：
TiO 2 / Ce干凝胶对木材的褐腐真菌具有非生物杀灭作用
使用木材作为环保建筑材料需要开发对环境无害的木材防腐剂，理想情况下在使用寿命内和使用寿命后无毒。然而，对于使用非生物杀灭方法保护木材免受木材腐烂真菌的保护知之甚少，因此，仍然很少有简单而有效的方法来增加使用寿命，而又不产生环境或健康风险。描述了一种新颖的木材保护方法，该方法基于异丙醇钛凝胶和硝酸铈（IV）铵作为稳定剂来处理木材。异丙醇钛的水解是由木材的OH-基团以及木材细胞壁中的水分引发的，随后产生铈掺杂的TiO 2层，不仅可以密封木材表面使其不直接暴露于水解酶，而且可以堵塞木材细胞的微孔/纳米孔。铈掺杂剂充当自由基清除剂，其在初始阶段猝灭羟基自由基。我们的研究表明，挪威云杉木材可通过globephyllum trabeum，Rhodonia胎盘和Coniophora puteana更好地防止木材腐烂。TiO 2/ Ce干凝胶涂层还提高了耐候性，因为即使经过加速的耐候性处理，改性样品也显示出良好的抗真菌性能。这种新颖的木材保护方法为传统的杀生物木材防腐剂提供了更绿色，更安全的替代方法，并且有可能延长木质材料的使用寿命，特别是在户外应用以及考古木材保护中。
更新日期：2018-03-20
中文翻译：
TiO 2 / Ce干凝胶对木材的褐腐真菌具有非生物杀灭作用
使用木材作为环保建筑材料需要开发对环境无害的木材防腐剂，理想情况下在使用寿命内和使用寿命后无毒。然而，对于使用非生物杀灭方法保护木材免受木材腐烂真菌的保护知之甚少，因此，仍然很少有简单而有效的方法来增加使用寿命，而又不产生环境或健康风险。描述了一种新颖的木材保护方法，该方法基于异丙醇钛凝胶和硝酸铈（IV）铵作为稳定剂来处理木材。异丙醇钛的水解是由木材的OH-基团以及木材细胞壁中的水分引发的，随后产生铈掺杂的TiO 2层，不仅可以密封木材表面使其不直接暴露于水解酶，而且可以堵塞木材细胞的微孔/纳米孔。铈掺杂剂充当自由基清除剂，其在初始阶段猝灭羟基自由基。我们的研究表明，挪威云杉木材可通过globephyllum trabeum，Rhodonia胎盘和Coniophora puteana更好地防止木材腐烂。TiO 2/ Ce干凝胶涂层还提高了耐候性，因为即使经过加速的耐候性处理，改性样品也显示出良好的抗真菌性能。这种新颖的木材保护方法为传统的杀生物木材防腐剂提供了更绿色，更安全的替代方法，并且有可能延长木质材料的使用寿命，特别是在户外应用以及考古木材保护中。
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