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Synergistic enhancement of toughness and viscosity of carbon nanotubes/polyether imide/polyether ether ketone nanocomposites

SONG Jiu-peng ZHAO Yan LI Xue-kuan XIONG Shu LI Shuang WANG Kai

宋九鹏, 肇研, 李学宽, 熊舒, 李爽, 王凯. 高韧性低黏度碳纳米管/聚醚酰亚胺/聚醚醚酮纳米复合材料的研究. 新型炭材料(中英文). doi: 10.1016/S1872-5805(22)60643-7
引用本文: 宋九鹏, 肇研, 李学宽, 熊舒, 李爽, 王凯. 高韧性低黏度碳纳米管/聚醚酰亚胺/聚醚醚酮纳米复合材料的研究. 新型炭材料(中英文). doi: 10.1016/S1872-5805(22)60643-7
SONG Jiu-peng, ZHAO Yan, LI Xue-kuan, XIONG Shu, LI Shuang, WANG Kai. Synergistic enhancement of toughness and viscosity of carbon nanotubes/polyether imide/polyether ether ketone nanocomposites. New Carbon Mater.. doi: 10.1016/S1872-5805(22)60643-7
Citation: SONG Jiu-peng, ZHAO Yan, LI Xue-kuan, XIONG Shu, LI Shuang, WANG Kai. Synergistic enhancement of toughness and viscosity of carbon nanotubes/polyether imide/polyether ether ketone nanocomposites. New Carbon Mater.. doi: 10.1016/S1872-5805(22)60643-7

高韧性低黏度碳纳米管/聚醚酰亚胺/聚醚醚酮纳米复合材料的研究

doi: 10.1016/S1872-5805(22)60643-7
详细信息
    通讯作者:

    肇 研. E-mail:jennyzhaoyan@buaa.edu.cn

  • 中图分类号: TB33

Synergistic enhancement of toughness and viscosity of carbon nanotubes/polyether imide/polyether ether ketone nanocomposites

More Information
  • 摘要: 聚醚醚酮(PEEK)具有良好的力学性能,但其较高的熔体黏度导致加工困难,因而限制了应用。本文采用湿粉法制备碳纳米管(CNTs)和聚醚酰亚胺(PEI)修饰的PEEK纳米复合材料,纳米复合材料的熔体黏度降低约50%。CNTs和PEI的加入使纳米复合材料的韧性得到协同提高,当PEI含量为4.95%,CNTs含量为0.05%时,纳米复合材料的断裂延伸率提高了129%,拉伸断裂能提高了97%。通过该方法制备的纳米复合材料熔体黏度较低,均匀分散的CNTs/PEI可在不影响耐热性的前提下有效降低PEEK纳米复合材料的加工难度。这种粉末共混改性的方法有望应用于热塑性复合材料的粉末浸渍工艺或激光烧结技术。
  • Figure  1.  Sample preparation, (a) The amination modification and in situ polymerization, and (b) CNT/PEI powder preparation and powder blending

    Figure  2.  Characterization of CNT-COOH and CNT-NH2, (a) Photographs of functionalized CNTs dispersed in anhydrous ethanol after different standing times. (b) FTIR spectra, (c) XPS survey spectra, (d) XPS spectra of CNT-COOH at C 1s region, (e) XPS spectra of CNT-NH2 at C 1s region, and (f) XPS spectra of CNT-NH2 at N 1s region

    Figure  3.  Characterizations of CNTs/PEI, (a) FTIR spectra of CNTs/PEI, (b) TG curves of CNTs/PEI powder, (c) SEM image of PEI-0, (d) SEM image of PEI-1, and (e) SEM image of PEI-2

    Figure  4.  Rheological curves of PEEK nanocomposites, and (a) Viscosity vs. temperature at a shear rate of 0.016 Hz. (b) Viscosity vs. shear rate at a temperature of 390 °C

    Figure  5.  The tensile properties of the PEEK nanocomposites: (a) Tensile strength, modulus, and elongation at break (n = 6), (b) Tensile fracture toughness, and (c) Tensile stress–strain curve

    Figure  6.  (a) Flexural strength and flexural modulus (n = 6) and (b) Notched Izod impact strength (n = 6)

    Figure  7.  Cross-sectional SEM images of the tensile-fractured surfaces of the PEEK nanocomposites

    Figure  8.  Crystallization behavior of PEEK nanocomposites under POM: (a–d) P0, (e–h) P5 and (i–l) C5

    Figure  9.  Etching morphology of the PEEK nanocomposites: (a) C1 and (b) C5

    Figure  10.  Schematic illustration of the deformation behavior in PEEK nanocomposites: (a) The C1, C2 and C5 nanocomposites, (b) P0 nanocomposites. (c) P1, (d) P2 and P5 nanocomposites

    Table  1.   Compositions of the PEEK nanocomposite samples

    Sample namePEEK (%)CNTs (%)Addition
    P0100.000.000
    P199.950.050
    P299.900.100
    P599.750.250
    C095.000.005 wt% PEI-0
    C195.000.005 wt% PEI-1
    C295.000.005 wt% PEI-2
    C595.000.005 wt% PEI-5
    下载: 导出CSV

    Table  2.   Mechanical testing standards

    Group/shapeTestingSpeed (mm/min)Standards
    DumbbellTensile test1GB/T 1040.1-2018/ISO 527-1:2012
    RectangularFlexural test2GB/T 9341-2008/ISO 178:2001
    Notched sampleCharpy impact test-GB/T 1043.1-2008/ISO 179-1:2000
    Notched sampleSingle-edge notched bend test10.0ASTM D5045-14
    下载: 导出CSV

    Table  3.   Characteristic temperatures and crystallinity of PEEK nanocomposites

    Sample nameTi/°CTmax/°CTg/°CTm/°CΔHm/J/gXm/%
    P0561586155.9347.754.0941.6
    P1566590154.6346.958.0944.7
    P2563591154.1346.453.8341.4
    P5566589157.4346.153.4941.2
    C0541566155.7346.147.1038.1
    C1546584159.9348.248.9539.6
    C2544580157.6345.150.4240.8
    C5542576153.6345.947.7238.6
    下载: 导出CSV

    Table  4.   Relevant studies on PEEK nanocomposites

    FillersFabrication methodsContent/%Elongation at break/%Increasement/%Reference
    CNTs Fused filament fabrication
    Additive manufacturing
    1.00 2.4 −22.0 [48]
    graphene nanoplatelets 3.00 3.5 12.0
    CNTs compatibilized with polysulfones Melt blending 0.10 (CNTs) 13.2 7.0 [45]
    graphene oxide Melt blending 0.50 25.0 86 [19]
    TiO2 Melt blending 3.00 42.0 20.0 [47]
    CNTs/PEI Powder blending 0.05 (CNTs) 93.0 129.0 This study
    下载: 导出CSV
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  • 收稿日期:  2022-05-13
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