Green chemical treatment of natural wood material for decay resistance by 3-iodo-2-propynyl butyl carbamate (IPBC) with supercritical CO2 as a carrier solvent
In order to improve the decay resistance of wood as the renewable natural material of biological origin,an organic preservative,3-iodo-2-propynyl butyl carbamate (IPBC),was penetrated into wood matrix by supercritical CO2 as a carrier solvent.And the effectiveness of penetrating IPBC into wood matrix through SC-CO2 was also examined in terms of preservative distribution,leachability resistance of preservative as well as decay resistance of wood.The results indicate that the optimum penetration craft under the adopted conditions was pressure: 19MPa,temperature: 35 ℃,pressure time: 2.5h and time for releasing pressure: 20min.And under the optimum condition,the mechanical properties of SC-CO2 treated wood were not significantly affected.SEM-EDX analysis indicate that IPBC mainly distributed in wood matrix due to the higher penetration of supercritical CO2 as a carrier solvent,and its leachability was remarkably reduced after such penetration.The decay resistance of SC-CO2 treated wood against fungi attack was improved 90.96％ over untreated wood,indicating effective decay resistance of wood after preservative penetration with SC-CO2.
Decay Resistance Wood 3-iodo-2-propynyl butyl carbamate (IPBC) Supercritical CO2 Penetration
Li Yongfeng Chen Peng Liu Yixing Wang Xiangming Wu Qinglin
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education,Northeast Fores FPInnovations-Forintek Division,Quebec,QC,G1P 4R4,Canada School of Renewable Natural Resources Agcenter Louisiana State University,Baton Rouge,Louisiana 7080
国际会议
哈尔滨
英文
2241-2245
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）