Preparation and Application Research of a Carbon Fiber Composite Bearing Bush Material

doi:10.12422/j.issn.1006-396X.2023.04.009

Abstract

Abstract:

Highstrength polymer materials with excellent mechanical properties and wear?resistance have been widely used in water pumps, electric generator and other fields as a new generation of bearing materials. A high performance polyurethane/carbon fiber composite （PUE/CF） was prepared by combining chopped carbon fiber (CF) with polyurethane elastomer (PUE), and the effects of carbon fiber content on the mechanical and tribological properties of the composites were investigated. The results show that the hardness of the composite can reach 60 ~ 68 HD, the tensile strength and elongation at break can reach 54 MPa and 298% respectively. Under dry friction condition, 0.16 of friction coefficient and 0.570% of wear rate can be obtained. Under water friction condition, 0.02 of friction coefficient and 0.129% of wear rate can be obtained. In summary, the composite prepared in this paper can meet the application requirements of polymer bearing bush and have broad application prospects in the field of automobile and ship.

Key words: Carbon fiber, Polyurethane, Composite material, Mechanical property, Tribological properties

摘要：

高强度的聚合物材料具有优异的力学性能和耐磨特性，作为新一代轴瓦材料，其广泛应用于水泵、水电发电机组等领域。通过短切碳纤维（CF）与聚氨酯弹性体（PUE）复合，制备了一种高性能聚氨酯弹性体/碳纤维（PUE/CF）复合材料，探究了CF质量分数对复合材料的力学性能和摩擦学性能的影响。结果表明，该复合材料的硬度可达到60~68 HD,拉伸强度和断裂伸长率分别为54 MPa和298%，干摩擦条件下摩擦系数和磨损率分别为0.16和0.570%，水润滑条件下摩擦系数和磨损率分别为0.02和0.129%。因此，该材料可以满足聚合物轴瓦材料的应用需求，在汽车、船舶等领域具有广阔的应用前景。

关键词: 碳纤维, 聚氨酯, 复合材料, 力学性能, 摩擦学性能

CLC Number:

TQ334.1

Zhongliang Sun, Yuting Zhang, Ruize Yuan, Siqi Zhan, Dongxiu Zhang, Shiwei Wang, Mingyao Zhang. Preparation and Application Research of a Carbon Fiber Composite Bearing Bush Material[J]. Journal of Petrochemical Universities, 2023, 36(4): 63-68.

孙中梁, 张钰婷, 袁瑞泽, 战思琪, 张栋秀, 王世伟, 张明耀. 一种碳纤维复合轴瓦材料的制备及应用研究[J]. 石油化工高等学校学报, 2023, 36(4): 63-68.

Figures/Tables 10

Fig.1 Effect of CF mass fraction on mechanical properties of PUE/CF composites

Table 1 Effect of CF mass fraction on tensile modulus of PUE/CF composites

w（CF）/%	拉伸模量/MPa
0	0.019 3
5	0.016 5
7	0.018 2
9	0.016 5
11	0.016 4
13	0.009 8
15	0.006 6

Fig.2 Effect of CF mass fraction on hardness of PUE/CF composites

Fig.3 Infrared spectroscopy of PUE/CF composites and PUE

Fig.4 Schematic diagram of PUE/CF composite friction

Fig.5 Friction coefficient and wear rate of PUE/CF composites with different CF mass fraction under dry friction conditions

Fig.6 The coefficient of friction of PUE/CF composites with 7%?CF mass fraction under dry friction

Fig.7 Friction coefficient and wear rate of PUE/CF composites with different CF mass fraction under water?lubricated friction conditions

Fig.8 The friction coefficient of PUE/CF composites with 7%?CF mass fraction under water?lubricated friction

Fig.9 SEM image of PUE/CF composite wear surface with different CF mass fraction

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