Thermal and mechanical properties of paper-based friction materials with nano-Al2O3 modified phenolic resin
XIE Maoqing1,2, WANG Leigang1, LUO Yiqin3, ZHAO Zaojun2
1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; 2. Zhejiang Tieliu Clutch Co., Ltd., Hangzhou 311101, China; 3. Zhejiang Fashion Institute of Technology, Ningbo 315211, China
Abstract：The paper-based friction materials using nano-Al2O3 modified phenolic resin as binder were prepared by paper-making process. The effects of resin contents (mass fraction) and curing temperatures on the heat resistance, shear strength, compressure resilience were studied. The results show that with the increase of resin contents, the heat resistance of the paper-based friction materials decreases slightly, the shear strength increases. In the first to fourth compression-rebound tests, the rebound rate increases greatly at the first compression-rebound cycle, while the rebound rate is close to each other from the second to fourth compression-rebound cycle and is less affected by the resin content. The compression rate decreases with the increase of resin content, and the compression rate at the first compression-rebound cycle is obviously higher than that of the following three times. At higher curing temperature, the materials have the higher heat resistance and shearing strength, meanwhile, the compression rate decreases obviously and rebound rate increases obviously with the increase of curing temperature at the first compression-rebound cycle. However, from the second to fourth compression-rebound cycle, the compression rate and rebound rate are close to each other, and are less affected by the curing temperature. The paper-based friction material possess the better heat resistance, higher shear strength, higher compression rate and high rebound rate when the modified phenolic resin is 40% and the curing temperature is 160 ℃.
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2021, Vol. 26 
