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多组分协同改性聚酰亚胺复合材料的高温摩擦学性能

尹宇航 赵盖 宋敬伏 丁庆军

尹宇航, 赵盖, 宋敬伏, 等. 多组分协同改性聚酰亚胺复合材料的高温摩擦学性能[J]. 复合材料学报, 2021, 39(0): 1-12
引用本文: 尹宇航, 赵盖, 宋敬伏, 等. 多组分协同改性聚酰亚胺复合材料的高温摩擦学性能[J]. 复合材料学报, 2021, 39(0): 1-12
Yuhang YIN, Gai ZHAO, Jingfu SONG, Qingjun DING. High temperature tribological properties of polyimide composites modified by multi-components[J]. Acta Materiae Compositae Sinica.
Citation: Yuhang YIN, Gai ZHAO, Jingfu SONG, Qingjun DING. High temperature tribological properties of polyimide composites modified by multi-components[J]. Acta Materiae Compositae Sinica.

多组分协同改性聚酰亚胺复合材料的高温摩擦学性能

基金项目: 国家自然科学基金(52075247);航天联合基金(U2037603);固体润滑国家重点实验室开放基金(LSL-1901)
详细信息
    通讯作者:

    赵盖,博士,副教授,硕士生导师,研究方向为超声电机摩擦材料 E-mai:zhaogai@nuaa.edu.cn

  • 中图分类号: TB332

High temperature tribological properties of polyimide composites modified by multi-components

  • 摘要: 通过提高聚酰亚胺(PI)的耐热性和导热性,从而提高其高温摩擦学性能。首先选择笼形聚倍半硅氧烷(POSS)和SiO2提升其耐高温性能,碳纳米管(CNTs)和Cu粉提升热导率。然后选择分子模拟和实验相结合的方法研究各组分对其性能的影响。结果表明,POSS和SiO2能够提升PI的耐高温性能和杨氏模量,但降低了热导率和冲击强度。Cu提高了PI的耐高温性能和热导率,但降低了力学性能。低含量的CNTs改性效果良好,但高含量时表现不佳。随后根据单组分改性实验的结果设计了多组分复合改性PI复合材料。结果表明,改性配比为3 wt% POSS、3 wt% SiO2、0.5 wt% CNTs和3 wt% Cu的复合材料综合性能最优,在高温下的摩擦性能表现最佳,200℃时的摩擦系数为0.65,比纯PI降低了27.8%;磨损率为5.11×10−5 mm3/(N·m),降低了19.3%。

     

  • 图  1  聚酰亚胺复合材料模型

    Figure  1.  Models of polyimide composites

    图  2  RTEC多功能表面测试仪(a)、常温摩擦测试设备(b)、高温摩擦测试设备(c)

    Figure  2.  RTEC Multifunctional surface tester (a), test module at normal temperature (b), test module at high temperature (c)

    图  3  单组分改性聚酰亚胺复合材料的热力学性能:(a)玻璃化转变温度;(b)热导率;(c)5%热失重温度

    Figure  3.  Thermodynamic properties of the single-component modified polyimide composites: (a) Glass transition temperature; (b) Thermal conductivity; (c) Temperature of 5% weight loss

    图  4  单组分改性聚酰亚胺复合材料的力学性能:(a)杨氏模量与剪切模量;(b)冲击强度

    Figure  4.  Mechanical properties of single-component modified polyimide composites: (a) Young's modulus and shear modulus; (b) Impact strength

    图  5  单组分改性聚酰亚胺复合材料的摩擦性能:(a)25℃时摩擦系数;(b)100℃时摩擦系数;(c)200℃的摩擦系数;(d)25℃时磨损率;(e)100℃时磨损率;(f)200℃时磨损率

    Figure  5.  Tribological properties of single-component modified polyimide composites: Friction coefficient at 25℃ (a), 100℃ (b) and 200℃ (c); Wear rate at 25℃ (d), 100℃ (e) and 200℃ (f)

    图  6  单组分改性聚酰亚胺复合材料磨痕50倍显微图

    Figure  6.  50 X micrograph of wear marks of single-component modified polyimide composites

    图  7  多组分复合改性聚酰亚胺复合材料的热力学性能:(a)玻璃化转变温度;(b)热导率;(c)5%热失重温度

    Figure  7.  Thermodynamic properties of multi-component modified polyimide composites: (a) Glass transition temperature; (b) Thermal conductivity; (c) Temperature of 5% weight loss

    图  8  多组分复合改性聚酰亚胺复合材料的力学性能:(a)杨氏模量与剪切模量;(b)冲击强度

    Figure  8.  Mechanical properties of multi-component modified polyimide composites: (a) Young's modulus and shear modulus; (b) Impact strength

    图  9  多组分复合改性聚酰亚胺复合材料在25℃、100℃和200℃时的摩擦性能:(a)摩擦系数;(b)磨损率

    Figure  9.  Tribological properties of polyimide composites at 25℃, 100℃ and 200℃: (a) Friction coefficient; (b) Wear rate

    图  10  多组分复合改性聚酰亚胺复合材料的磨痕观测:(a) 50倍光学显微镜下;(b) 2000倍电子显微镜下

    Figure  10.  Wear marks of polyimide composites under 50 X (a) and 2000 X (b)

    表  1  多组分共混改性聚酰亚胺配方

    Table  1.   Formulation of multi-component modified polyimide composites

    SampleMass fraction of modification
    POSS/
    %
    SiO2/
    %
    Cu/
    %
    CNTs/
    %
    PI/
    %
    3%POSS-0.5%CNTs/PI3000.596.5
    3%SiO2-0.5%CNTs/PI0300.596.5
    3%Cu-0.5%CNTs/PI0030.596.5
    3%POSS-3%SiO2-0.5%CNTs/PI3300.593.5
    3%POSS-3%SiO2-3%Cu-0.5%CNTs/PI3330.590.5
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  • 收稿日期:  2021-11-03
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