Properties of Wood Modified with Glutaraldehyde
Introduction Chemical modification is an effective strategy to impart wood new properties and, thereafter, wood acquires the improved durability. Among the chemicals investigated aldehydes is one class which shows potentials in wood protection. Some dialdehyde reagents such as glyoxal and glutaraldehyde have been tested in modifying cotton fabrics 1. Under the acidic condition and in the absence of free water, typical aldehyde group will react with hydroxyl groups of celluloses to form first moderately stable derivatives hemiacetals, which react further to yield stable acetals. Modification with glutaraldehyde has been reported to improve the dimensional stability of wood using sulphur dioxide (SO2) as catalyst. Treatments of sitka spruce with glyoxal and glutaraldehyde using SO2 as catalyst to 23% weight percent gain, respectively, produce an antiswelling efficiency (ASE) up to 70%. The hygroscopicity is not, however, drastically changed by these treatments. Biological resistance of Japanese cedar and beech wood modified with glutaraldehyde were investigated by exposing the treated wood to decay fungi and termites displaying that the treated wood is highly effective in resisting the attack on wood by these tested fungi and termites. Some Lewis acids such as magnesium chloride have been also tested as catalysts promoting the crosslinking reaction with cotton fibers, but few research reported them application for solid wood.
Zefang Xiao Yanjun Xie Carsten Mai Holger Militz
Wood Biology and Wood Products, University of Goettingen,Buesgenweg 4, D-37077, Goettingen, Germany
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
385-386
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）