氧化石墨烯改性玄武岩纤维/聚酰亚胺复合材料的制备与摩擦学性能
Preparation and Tribological Performance of Graphene Oxide Modified Basalt Fiber/Polyimide Composites
李轩 1周德东 1何瑜 1张立京 2吕威 1张续译 1杨远鹏 1刘志章1
作者信息
- 1. 四川轻化工大学机械工程学院,四川自贡 643000
- 2. 西安长峰机电研究所,陕西西安 710065
- 折叠
摘要
通过静电自组装法将氧化石墨烯(GO)附着在硅烷偶联剂KH550接枝后的玄武岩纤维表面,并采用热模压工艺制备了 GO改性玄武岩纤维/聚酰亚胺复合材料(GBF/PI).对比研究了聚酰亚胺(PI)、玄武岩纤维/聚酰亚胺(BF/PI)、KH550改性玄武岩纤维/聚酰亚胺(KBF/PI)、GBF/PI复合材料的力学性能和摩擦磨损性能.结果表明,GBF/PI复合材料的维氏硬度、压缩强度和弯曲强度分别为66.5 HV,275.9 MPa和169.8 MPa,较PI试样分别提高约29.2％,45.8％和47.1％,较BF/PI试样分别提高约 21.9％,27.0％和28.1％,较KBF/PI试样分别提高约 6.9％,20.2％和 10.2％.与 PI,BF/PI和KBF/PI试样相比,GBF/PI复合材料具有更优的热稳定性,其中GBF/PI的起始分解温度和质量残留率分别为398.4 ℃和57.70％,明显高于PI树脂的387.5 ℃和49.36％.摩擦磨损实验结果表明,与GCr15对磨60 min后,GBF/PI的平均摩擦系数为0.617,磨损率为5.22×10-6mm3/(N·m),较PI树脂试样分别低约11.4％和47.2％,较BF/PI试样分别低约7.7％和27.0％,较KBF/PI试样分别低约8.4％和12.0％.GO的引入有利于形成致密均匀的摩擦层,减轻了 PI基复合材料摩擦损伤,提高了材料的减磨抗磨性能.
Abstract
By electrostatic self-assembly method,graphene oxide(GO)was adhered to the surface of basalt fibers grafted with silane coupling agent KH550,followed by the fabrication of GO-modified basalt fiber/polyimide composite material(GBF/PI)by hot compression molding process.The mechanical and frictional-wear properties of polyimide(PI),basalt fiber/polyimide(BF/PI),KH550-modified basalt fiber/polyimide(KBF/PI),and GBF/PI composite materials were comparative investigated.The results indicate that the Vickers hardness,compressive strength,and flexural strength of the GBF/PI composite are 66.5 HV,275.9 MPa,and 169.8 MPa,respectively.These values reveal enhancements of approximately 29.2％,45.8％,and 47.1％compared to the PI specimens,21.9％,27.0％and 28.1％compared to the BF/PI specimens,and 6.9％,20.2％and 10.2％compared to the KBF/PI specimens,respectively.In comparison with the PI,BF/PI and KBF/PI specimens,the GBF/PI composites have superior thermal stability,in which the onset decomposition temperature and mass residual rate of GBF/PI are 398.4 ℃ and 57.70％,respectively,which are significantly higher than those of the PI resins at 387.5 ℃ and 49.36％.Frictional-wear test results indicate that after 60 min of sliding against GCr15,the average friction coefficient of GBF/PI is 0.617,and the wear rate is 5.22×10-6mm3/(N·m).These values are approximately 11.4％and 47.2％lower than those of the PI specimens,7.7％and 27.0％lower than the BF/PI specimens,and 8.4％and 12.0％lower than the KBF/PI specimens.The introduction of GO facilitated the formation of dense and uniform friction layer,mitigating frictional damage to the PI-based composites and enhancing their anti-wear performance.
关键词
聚酰亚胺/玄武岩纤维/氧化石墨烯/表面改性/摩擦磨损Key words
polyimide/basalt fiber/graphene oxide/surface modification/frictional wear引用本文复制引用
基金项目
四川省科技计划项目(2023YFG0239)
四川轻化工大学科研创新团队计划项目(H92322)
机械结构优化及材料应用泸州市重点实验室开放课题(SCHYZSB-2023-01)
机械结构优化及材料应用泸州市重点实验室开放课题(SCHYZSA-2023-01)
2023年四川轻化工大学大学生创新创业项目(CX2023072)
出版年
2024
NETL
NSTL
万方数据