Lin Mingcen, Zhou Wenling, Yao Ye, Chen Jingxiang, Zhang Chunhui
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Chinese-German Institute of Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.
Polymers (Basel). 2023 Jun 16;15(12):2702. doi: 10.3390/polym15122702.
Paper-based friction material is a typical paper-based composite that is usually cured via hot-pressing. This curing method does not account for the effect of pressure on the matrix resin, resulting in uneven distribution of resin in the material and reducing the mechanical properties of friction materials. To overcome the above shortcomings, a pre-curing method was introduced before hot-pressing, and the effects of different pre-curing degrees on the surface morphology and mechanical properties of paper-based friction materials were studied. The pre-curing degree significantly affected the resin distribution and interfacial bonding strength of the paper-based friction material. When the material was cured at 160 °C for 10 min, the pre-curing degree reached 60%. At this point, most of the resin was in a gel state, which could retain abundant pore structures on the material surface without causing mechanical damage to the fiber and resin matrix during hot-pressing. Ultimately, the paper-based friction material exhibited improved static mechanical properties, decreased permanent deformation, and reasonable dynamic mechanical properties.
纸质摩擦材料是一种典型的纸基复合材料，通常通过热压固化。这种固化方法没有考虑压力对基体树脂的影响，导致材料中树脂分布不均匀，降低了摩擦材料的机械性能。为了克服上述缺点，在热压前引入了预固化方法，并研究了不同预固化程度对纸质摩擦材料表面形貌和机械性能的影响。预固化程度显著影响纸质摩擦材料的树脂分布和界面结合强度。当材料在160℃下固化10分钟时，预固化程度达到60%。此时，大部分树脂处于凝胶状态，这可以在材料表面保留丰富的孔隙结构，并且在热压过程中不会对纤维和树脂基体造成机械损伤。最终，纸质摩擦材料表现出改善的静态机械性能、降低的永久变形和合理的动态机械性能。
