Methods of retention increasing urea formaldehyde resin in order to produce wood-polymer from Paulownia

Document Type : Research Paper

Authors

Abstract

In this research, suitable treatment was studied for increasing resin retention in Paulownia wood. Retention amount of Paulownia with urea formaldehyde resin was studied after treatment by 3 type's solutions NaOH, NaCl and Urea with 1% and 2% concentrations in 20 and 40 0C during 4 and 8H. By 3 repeats for each treatment, totally 72 specimens with dimension 5×5×15 cm3 were provided. After performing pre-treatment, impregnation was done by urea formaldehyde resin and its polymerization. The results showed the precent of resin retention of the treatment specimens to control was increased and NaCl solution with 2% concentration in 20 0C and during 8H have been had the most effect on resin retention rate. Generally, pre-treatment causes to improve resin retention in Paulownia

Keywords

References

[1]     Sadatnejad, S.H., Tajvidi, M., and Yosefi, H., 2008. Effect of longitudinal compression to bulk cell wall on mechanical properties of steamed treated of beach wood. Iranian Journal of Wood and Paper Science Research 23(2): 191-199.
[2]     Edalat, H.R., Tabarsa, T., and Reisi, M., 2008. Densification of Paulownia wood by using of hot-press. Iranian Journal of Wood and Paper Science Research. 23(2): 136-148.
[3]     Farsi, M. 2004. Investigation the structure of particleboard from mixture Eucalyptus and Paulownia. M.Sc. Thesis, Gorgan University of Agricultural Sciences and Natural Resources, 125p.
[4]     Omidvar, A., 2009. Textbook of Wood-polymer composite, Gorgan University of Agricultural Sciences and Natural Resources Publication, 120p.
[5]     Omidvar, A., and Omrani, M.A., 2005. Investigation on treatability of Paulownia wood using polymerization technique. Journal of Agricultural Sciences and Natural Resources 12(5): 30-38. 
[6]     Guo Feng, W., Yi F.J, Ping. Q., Sheng, Y., Jun, W.P., 2011. Study on compressed wood with urea-formaldehyde prepolymer. Materials Science Forum 675–677: 411-414.
[7]     Jinshu, S., Jianzhang L., Wenrui Z., and Derong Z., 2007. Improvement of wood properties by urea-formaldehyde resin and nano-SiO2. Frontiers of Forestry in China 2: 104-109.
[8]     Sekalu, M., 2010. The effect of chemical treatment with Phenol formaldehyde resin and Urea formaldehyde resin on compression set and mechanical properties of Paulownia. M.Sc. Thesis. Gorgan University of Agricultural Sciences and Natural Resources. 115p.     
[9]     Gindl W., Zargar-Yaghubi F., Wimmer R., 2003. Impregnation of softwood cell walls with melamine-formaldehyde resin. Bioresource Technology 87: 325–330.
[10] Shams, M.D., and Yano, H., 2009. A new method for obtaining high strength PF resin impregnated wood composites at low pressing pressure. Journal of Tropical Forest Science 21(2): 175-180.
[11] Ebrahimi, Gh. 2007. [In translation:] Mechanics of Wood and Wood Composites. Bodig, J., and Jayne, BA. [Writers]. Tehran University publication, 686p.
 

Files

Share

How to cite

Statistics