树脂在纸基摩擦材料中分布规律的研究

Study on the distribution of resin in paper-based friction materials

关键词:  纸基摩擦材料  树脂分布  浸渍

Key Words:paper-based friction materials  resin distribution  impregnation

摘要:纸基摩擦材料的结构和性能本质上受其表面及内部树脂的支配，树脂分布均匀性决定了材料内部各组分间的相互作用，从而影响整体的物理和化学特性。为实现树脂在材料中的均匀分布，探究了树脂浸渍液浓度对树脂在材料Z-向分布的影响。结果表明，随着树脂浸渍液浓度升高，材料的树脂含量增加，孔隙率和平均孔径减小。树脂含量较低时，树脂在材料Z-向分布比较均匀，体积分数为7%左右。随树脂含量增加，由于原纸中纤维、填料和空隙的不均匀分布，造成树脂在浸胶纸Z-向分布不均，同时，材料的树脂含量两面差增大。当树脂含量为50%时，树脂进一步占据材料内部被空气占据的可用空间，导致材料内部树脂继续增多，但树脂两面差仅0.5%。

Abstract:The structure and properties of paper-based friction materials are essentially dominated by their surface and internal resins. The uniformity of resin distribution determines the interaction between the components inside the material, thus affecting the overall physical and chemical properties. In order to realize the uniform distribution of the resin in the material, the effect of the concentration of the resin impregnation solution on the Z-direction distribution of the resin in the material was investigated. The results show that with the increase of resin impregnation solution concentration, the resin content of the material increases, and the porosity and average pore size decrease. When the resin content is low, the resin is evenly distributed in the Z-direction of the material, and the volume fraction is about 7%. With the increase of resin content, due to the uneven distribution of fibers, fillers and voids in the base paper, the distribution of resin in the Z-direction of impregnated paper is uneven, and the difference between the two sides of the resin content of the material increases. When the resin content is 50%, the resin further occupies the available space occupied by the air inside the material, resulting in the continuous increase of the resin inside the material, but the two-sided difference of the resin is only 0.5%.