Synthesis and Application of a Modifier with Low Formaldehyde Emission to Enhance General Wood Properties
(0) A preparation method of Urea-formaldehyde performed polymer(UFP) with low molecular weight and high reactivity is presented. The UFP can impregnate into wood along trachea from the ends with pressurized impregnation method. In the following heating and pressing processes of the wood, the UFP polymerizes, and it enhances stability and strength of the wood. The impregnating-pressing-drying method avoiding the disadvantage of dealing with the large specimens using vaccum-pressing method is suitable for industrial production. Results from test showed the degree of crystallinity tested by XRD were 30％, 32％ in different dosage of the modifier. Utilizing a combination of low molecular weight resin impregnation and pressing resulted in a density increase of UFP treated wood from 0.214 to 0.268g/cm3. At the same time, the Youngs modulus and bending strength increased from 1.407GPa to 1.759GPa and 64MPa to 74.5MPa, respectively. But the formaldehyde emission is great reduced from 0.5％ to 0.008％. It can be concluded that the effective utilization of UFP impregnated in wood is a promising technique for the production of high-strength in the drying and pressing processing.
polar wood formaldehyde emission modify wood
Yifei Jiang Guofeng Wu Shuping Song Heyu Chen Junwen Pu
College of Material Science and Technology,Beijing Forestry University,Beijing Qinghua East Road No.35,100083,China
国际会议
2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)
重庆
英文
1018-1021
2010-09-17（万方平台首次上网日期，不代表论文的发表时间）