Effects of Lignocellulose Contents in Bamboo Charcoal on Mechanical and Thermal Properties of Polybenzoxazine-based Friction Materials

[摘要] The objective of this research is to study mechanical and thermal properties of polybenzoxazine-based friction materials (PFMs) filled with 10 wt% bamboo charcoal particles (BC) containing residual lignocellulose content of 0-10wt% (BC0-10%), 10-20wt% (BC10-20%) and 20-30wt% (BC20-30%). The PFMs filled with synthetic graphite particles was also prepared to compare the properties. The obtained results showed that the mechanical properties, i.e., flexural strength and flexural modulus of the PFMs were improved with an increase of the residual lignocellulose content, and tended to be higher than that of the PFMs filled with synthetic graphite particles. Thermal stability monitored by the degradation temperature at 5% weight loss (T_d5) of the PFMs revealed a decrease with an increasing residual lignocellulose content in BC. However, the T_d5 of the PFMs filled with BC is still higher than the generated heat during the braking, which has temperatures around 350 °C. The results suggested that the obtained composite material is a promising candidate for car brake pads.

[学科分类] 材料科学（综合）