Effect of curing time on physical and mechanical properties of phenolic-treated bamboo strips

• Main Authors: Uyup, Mohd Khairun Anwar, Md. Tahir, Paridah, Hussain, Hamdan, Salit, Mohd Sapuan, Bakar, Edi Suhaimi
• Format: Article
• Language: English; English
• Published: 2009
• Online Access: http://psasir.upm.edu.my/id/eprint/5817/1/Effect%20of%20curing%20time%20on%20physical%20and%20mechanical%20properties%20of%20phenolic-treated%20bamboo%20strips.pdf; http://psasir.upm.edu.my/id/eprint/5817/; http://dx.doi.org/10.1016/j.indcrop.2008.05.003

Effect of pressing time on physical and mechanical properties of phenolic-impregnated bamboo strips was evaluated. Bamboo strips (Gigantochloa scortechinii) were impregnated with low molecular weight phenol formaldehyde (LMwPF) resin. Samples were submerged in LMwPF resin using a vacuum chamber of 750 mmHg for 1 h before it was released within 1.5 h. Treated strips were dried in an oven with a temperature of 60 °C within 6-9 h. It was hot pressed at 14 kg m-2 and a temperature of 140 °C for 5, 8, 11, 14 and 17 min. The physical and mechanical properties of the test indicated that the properties of phenolic-treated strips have significantly increased as compared to control samples. Dimensional stability (water absorption, thickness swelling and linear expansion) of the phenolic-treated properties were significantly lower than control after 5-min pressing time. The antishrink efficiency (ASE) of phenolic-treated strips increased when pressing time were extended from 5 to 17 min. The mean value of modulus of rupture (MOR) for the control samples (177 N mm-2) showed a significant difference with phenolic-treated strips after 17-min pressing time (224 N mm-2). However, there is no significant difference in compression parallel to grain. The MOE of phenolic-treated strips was 21,777 N mm-2 and for control was 18,249 N mm-2, whereas the compression parallel to grain values for phenolic-treated and control samples were 94 and at 77 N mm-2, respectively.