稀土溶液改性对竹纤维增强制动材料力学与摩擦学性能的影响

Effect of rare earth solution modification on mechanical and tribological properties of bamboo fiber reinforced brake materials

通过对竹纤维进行不同工艺的稀土溶液改性（RES）处理,探索其对增强树脂基制动材料的力学和摩擦学性能的影响。结果表明：对竹纤维进行RES改性不仅可改善其与树脂基体间的界面粘结性能,同时还可提高竹纤维的耐热性能,经RES改性后的竹纤维耐热性较未处理高出一倍,可大大减少竹纤维在高温时的碳化程度,进而提高制动材料的高温摩擦性能;经RES改性竹纤维,其增强的复合材料力学和摩擦性能均得到提高;RES浓度为20%,改性时间为30 min的试样综合摩擦学性能最优,各个温度的摩擦系数均在0.40~0.50之间。

The effects of the modification of rare earth solution（ RES） with different concentration in different processing time on mechanical and tribological properties of bamboo fiber reinforced resin matrix brake materials were investigated. The results show that the RES modification of bamboo fiber can not only improve the interfacial bonding property between the bamboo fiber and resin matrix,but also improve the heat resistance of the bamboo fiber. The heat resistance of the bamboo fiber after RES modification is twice as high as that of the untreated bamboo fiber,the degree of carbonization of the bamboo fiber at high temperature can be greatly reduced,and the friction properties of the brake materials can be improved at high temperature. The mechanical and friction properties of the RES modified bamboo fiber reinforced composites are both enhanced. When the RES concentration is 20% and modification time is 30 min,the tribological properties of the bamboo fiber reinforced brake materials are optimal,and the friction coefficient at different temperatures is between 0. 40 and 0. 50.