Synthesis and Application of a Modifier to Enhance General Properties of the Polar Wood

Abstract:

A preparation method of modifier with low molecular weight and high reactivity is presented. This modifier （called KFK in lab）can impregnate into polar wood along trachea from the ends with pressurized impregnation method. In the following heating and pressing processes of the polar wood, the KFK polymerizes, and it enhances stability and strength of the wood. It showed that the favorable conditions for synthetic reaction of the KFK are: molar ratio of U and F, 1:1; reaction temperature, 20°C; reaction time, 3 hours; dosage of ignition primer A: 5%. 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 KFK resin-treated wood from 0.214 to 0.268g/cm3. At the same time, the Young’s modulus and bending strength increased from 1.407GPa to 1.759GPa and 64MPa to 74.5MPa, respectively. It can be concluded that the effective utilization of KFK resin impregnated in polar wood is a promising technique for the production of high-strength in the drying and pressing processing.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 399-402
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.399
• Online since: February 2011
• Authors: Yi Fei Jiang, Guo Feng Wu, Hao Zhang, Ping Qu, Jun Wen Pu
• Keywords: Dynamic Mechanical Thermal Analyzer, Modify Wood, Polar Wood

References

[1] Guofeng Wu, Yifei Jiang(2010) Chemical and Physical Changes for Dimensionally Stability of Compressed Wood, Advanced Materials Research Vols. 129-131 (2010) pp.46-49.

DOI: 10.4028/www.scientific.net/amr.129-131.46

[2] Yifei Jiang, Guofeng Wu(2010) Synthesis and Application of a Modifier with Low Formaldehyde Emission to Enhance General Wood Properties, Advanced Materials Research Vols. 129-131 (2010) pp.1018-1021.

DOI: 10.4028/www.scientific.net/amr.129-131.1018

[3] Yano H, Hirose A, Collins PJ, Yazaki Y (2001) Effects of removal of matrix substances as a pretreatment in the production of high strength resin impregnated wood based materials. J Mater Sci Lett 20: 1125–1126.

[4] Yano H (2001) Potential strength for resin impregnated compressed wood. J Mater Sci Lett 20: 1127–1129.

[5] Yano H, Mori AK, Collins PJ, Yazaki Y (2000) Effects of elementsize and orientation in the production of high strength resin impregnated wood based materials. Holzforchung 54: 443–447.

DOI: 10.1515/hf.2000.073

[6] Wolcott MP, Kamke FA, Dillard DA (1990) Fundamentals of flake board manufacture: viscoelastic behavior of the wood component. Wood Fiber Sci 22: 345–361.