剑麻纤维增强酚醛基摩擦材料的研制

Development of Sisal Fiber Reinforced Frictional Material

以酚醛树脂为基体，以经过表面预处理的剑麻纤维为增强材料，研制出新型无石棉摩擦材料，其各项性能均达到汽车制动器衬片GB5763—1998的规定，且与市场产品的摩擦磨损性能处于同一范围，可作为目前常用石棉摩擦材料的更新换代产品。通过研究剑麻纤维的质量分数和表面状态对材料摩擦磨损性能的影响，发现剑麻纤维的最佳质量分数为10％～20％。研究结果表明，采用碱处理、偶联剂处理和阻燃剂处理后的剑麻纤维，可以较好地改善复合材料的摩擦磨损性能。

Asbestos-free frictional material is developed by using phenolic resins as matrix, and surface-treated sisal fiber as reinforcement. Experimental results show that the properties of friction coefficient and wear can meet the requirement of GB5763-1998. Comparing with those of the marketable brakes, it was demonstrated that new frictional material could be the replacement of the asbestos frictional material. The influences of content and surface morphology of sisal fiber on frictional and wear properties are discussed. The best mass content of fiber is 15% ～ 20% . Sisal fiber treated by alkali, flame retardant and coupling agent can improve the friction coefficient and decrease the wear ratio.