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^(-6)mm^(3)/(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。
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^(-6) mm^(3)/(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.
作者
李轩
周德东
何瑜
张立京
吕威
张续译
杨远鹏
刘志章
Xuan Li;Dedong Zhou;Yu He;Lijing Zhang;Wei Lü;Xuyi Zhang;YuanpengYang;Zhizhang Liu(College of Mechanical Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;China United Northwest Institute for Engineering Design and Research Corporation,Xi’an 710065,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2024年第5期76-86,共11页
Polymer Materials Science & Engineering
基金
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,SCHYZSA-2023-01)
2023年四川轻化工大学大学生创新创业项目(CX2023072)。
