Abstract
The effect of lignin on the physicomechanical, tribological, and morphological characteristics of corn stalk fiber-reinforced friction materials was investigated in this study by testing various lignin contents and fabricated composites. Experimental results indicated that a decrease in lignin content benefits the fade resistance, wear resistance, and recovery behaviors of the friction materials. Sample FMC-3 containing fibers with a lignin content of 6.7% exhibited the optimum friction stability and wear performance among the tested samples; it has fade rate of 10.2%, recovery rate of 105.3%, and sum wear rate of 1.817 × 10−7 cm3 (N · m)−1. Worn surface analyses revealed that a suitably low content of lignin may improve fiber-matrix interface bonding and stable secondary plateau formation, which effectively enhance the tribological behavior of friction materials.
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