Preparation of Lignin Modified High Wearable Phenolic Resin

摘要

Enzymatic hydrolysis lignin (EHL) and phenol are structurally similar in terms of possessing the hydroxyl groups as the active chemical groups. Therefore, EHL can be partially substituted for phenol in phenol-formaldehyde (PF) resin synthesis. The purpose of this study is to investigate the effect of PF resin synthesis and tribological properties of PF resin-based friction materials with EHL contents ranging from 0 to 20 wt.% (by mass, based on the mass of phenol), which content of EHL in each PF resin was changed by 5%.The thermal stability of the modified PF resin was characterized by TGA. The results show that the residual solid is higher than that of pure PF resin at 800 °C. Furthermore, the fluidity of EHL and CNSL modified novolac phenolic resin was discussed. In addition, EHL and CNSL modified PF resin showed better tribological properties than those of pure PF resin.