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Effect of surface functionalization on the surface and interfacial properties of thermoplastic-coated carbon fibers in poly (ether ether ketone) matrix composites

SU Ya-nan ZHANG Shou-chun ZHANG Xing-hua JING De-qi

苏亚男, 张寿春, 张兴华, 经德齐. 表面官能化对热塑性涂层改性碳纤维表界面性质的影响[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60023-25
引用本文: 苏亚男, 张寿春, 张兴华, 经德齐. 表面官能化对热塑性涂层改性碳纤维表界面性质的影响[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60023-25
SU Ya-nan, ZHANG Shou-chun, ZHANG Xing-hua, JING De-qi. Effect of surface functionalization on the surface and interfacial properties of thermoplastic-coated carbon fibers in poly (ether ether ketone) matrix composites[J]. NEW CARBOM MATERIALS. doi: 10.1016/S1872-5805(21)60023-25
Citation: SU Ya-nan, ZHANG Shou-chun, ZHANG Xing-hua, JING De-qi. Effect of surface functionalization on the surface and interfacial properties of thermoplastic-coated carbon fibers in poly (ether ether ketone) matrix composites[J]. NEW CARBOM MATERIALS. doi: 10.1016/S1872-5805(21)60023-25

表面官能化对热塑性涂层改性碳纤维表界面性质的影响

doi: 10.1016/S1872-5805(21)60023-25

Effect of surface functionalization on the surface and interfacial properties of thermoplastic-coated carbon fibers in poly (ether ether ketone) matrix composites

Funds: Youth Innovation Promotion Association Funds for Chinese Academy of Science(2012140); Special Project of Strategic Leading Science and Technology of Chinese Academy of Sciences (A) Sub Topic (Grant numbers XDA17040519); Key R&D Projects of Shanxi Province (201803D121042)
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  • 摘要: 本文利用混酸氧化以及乙二胺接枝的方法得到羟基和氨基官能化碳纤维(CF-OH以及CF-NH2),之后进行磺化聚醚醚酮上浆处理,制备了热塑性上浆剂涂层改性的官能化碳纤维(CF-OH-SPEEK以及CF-NH2-SPEEK),并研究表面官能化对热塑性涂层改性碳纤维表面以及复合材料界面性质的影响。结果表明,经过表面官能化处理后,碳纤维的表面官能团含量以及表面润湿能力得到了明显的提高。核磁氢谱分析显示,官能化引入的—OH、—NH2等基团能与磺化聚醚醚酮发生化学反应,提高碳纤维和上浆涂层之间的结合能力。因此,与磺化聚醚醚酮直接涂层改性的退浆碳纤维(desized-SPEEK)相比,CF-OH-SPEEK以及CF-NH2-SPEEK与聚醚醚酮复合时界面剪切强度分别提高了6.2%和14.0%,证明表面官能化处理有利于提高热塑性涂层改性的碳纤维复合材料的界面结合能力。
  • Figure  1.  The process of surface functionalization and sizing treatment

    Figure  2.  The schematic diagram of measuring dynamic contact angle

    Figure  3.  The schematic diagram of monofilament tensile testing specimen

    Figure  4.  The schematic diagram of micro-droplet debonding testing specimen

    Figure  5.  Scanning electron microscope images of CF: (a) desized CF, (b) desized−SPEEK, (c) CF−OH, (d) CF−OH−SPEEK, (e) CF−NH2 and (f) CF−NH2−SPEEK

    Figure  6.  AFM images of CF: (a) desized CF, (b) desized−SPEEK, (c) CF−OH, (d) CF−OH-SPEEK, (e) CF−NH2 and (f) CF−NH2−SPEEK

    Figure  7.  XPS wide-scan spectra of CF surface: (a) desized CF, (b) desized−SPEEK, (c) CF−OH, (d) CF−OH−SPEEK, (e) CF−NH2 and (f) CF−NH2−SPEEK

    Figure  8.  XPS wide-scan spectra of CF surface: (a) desized CF, (b) desized −SPEEK, (c) CF−OH, (d) CF−OH−SPEEK, (e) CF−NH2 and (f) CF−NH2−SPEEK

    Figure  9.  The structure of SPEEK

    Figure  10.  The 1H NMR spectra of CF: (a) desized −SPEEK, (b) CF−OH−SPEEK and (c) CF−NH2−SPEEK

    Figure  11.  The Weibull distribution curves of CF: (a) desized CF, (b) desized −SPEEK, (c) CF−OH, (d) CF−OH−SPEEK, (e) CF−NH2 and (f) CF−NH2−SPEEK

    Figure  12.  The IFSS of CF/PEEK composites: (a) CFs without sizing and (b) CFs after SPEEK sizing

    Table  1.   The surface energy and its components of test liquids

    Test Liquidsγp (mN/m)γd (mN/m)γ (mN/m)
    DI5121.872.8
    CH2I2050.850.8
    下载: 导出CSV

    Table  2.   Surface roughness of CFs

    CF TypesSa(nm)
    Desized CF5.6±1.1
    Desized−SPEEK12.7±2.3
    CF−OH23.4±3.2
    CF−OH−SPEEK18.3±2.9
    CF−NH227.2±4.8
    CF−NH2−SPEEK21.7±3.6
    下载: 导出CSV

    Table  3.   Surface elemental compositions of CFs

    CF TypesElemental compositions (%)O/C (%)
    CNOSSi
    Desized83.700.8512.702.7515.17
    DesizedSPEEK82.4615.730.531.2819.08
    CFOH73.9523.982.0732.43
    CFOHSPEEK75.2922.970.641.1030.51
    CFNH273.694.0820.731.5028.13
    CFNH2SPEEK75.073.2119.670.691.3626.20
    下载: 导出CSV

    Table  4.   The fitting results of C1s curves

    CF TypesPeak assignment (%)Surface
    functional
    group (%)
    C—CC—NC—OC—SC=OO—C=O
    Desized77.902.5616.363.1822.10
    DesizedSPEEK72.9017.702.433.383.5927.10
    CFOH67.0620.894.897.1632.94
    CFOHSPEEK68.1221.122.504.254.0131.88
    CFNH266.789.0016.544.093.5933.22
    CFNH2SPEEK67.207.1816.942.464.152.0732.80
    下载: 导出CSV

    Table  5.   The dynamic contact angles and surface free energy results of CFs

    CF Types Contact angle (°)γp(mN/m)γd(mN/m)γ(mN/m)
    DICH2I2
    Desized72.9952.818.1232.6940.81
    Desized-SPEEK59.2836.6612.2641.2553.51
    CF-OH48.8224.3116.0046.3962.39
    CF-OH-SPEEK52.7429.2214.5944.5459.13
    CF-NH248.1123.6216.2946.6362.92
    CF-NH2-SPEEK51.1527.1515.1445.3660.50
    下载: 导出CSV

    Table  6.   The results of tensile strength and Weibull modulus

    CF TypesTensile strength(GPa)Weibull modulus, m
    Desized CF4.689.97
    Desized−SPEEK4.7910.02
    CF−OH4.367.64
    CF−OH−SPEEK4.527.94
    CF−NH24.376.79
    CF−NH2−SPEEK4.467.46
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-01-01
  • 修回日期:  2021-01-01
  • 网络出版日期:  2021-03-31

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