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微波对碳纤维的改性作用及其对电子束固化CFRP界面性能的影响

张静静 梁森 汤超

张静静, 梁森, 汤超. 微波对碳纤维的改性作用及其对电子束固化CFRP界面性能的影响[J]. 复合材料学报, 2023, 40(7): 3900-3911. doi: 10.13801/j.cnki.fhclxb.20220922.004
引用本文: 张静静, 梁森, 汤超. 微波对碳纤维的改性作用及其对电子束固化CFRP界面性能的影响[J]. 复合材料学报, 2023, 40(7): 3900-3911. doi: 10.13801/j.cnki.fhclxb.20220922.004
ZHANG Jingjing, LIANG Sen, TANG Chao. Modification of carbon fiber by microwave and its effect on interfacial properties of electron beam cured CFRP[J]. Acta Materiae Compositae Sinica, 2023, 40(7): 3900-3911. doi: 10.13801/j.cnki.fhclxb.20220922.004
Citation: ZHANG Jingjing, LIANG Sen, TANG Chao. Modification of carbon fiber by microwave and its effect on interfacial properties of electron beam cured CFRP[J]. Acta Materiae Compositae Sinica, 2023, 40(7): 3900-3911. doi: 10.13801/j.cnki.fhclxb.20220922.004

微波对碳纤维的改性作用及其对电子束固化CFRP界面性能的影响

doi: 10.13801/j.cnki.fhclxb.20220922.004
基金项目: 国家自然科学基金 (52075280)
详细信息
    通讯作者:

    张静静,博士,副教授,硕士生导师,研究方向为树脂基复合材料成型技术及界面强化 E-mail: zhangjingjing@qut.edu.cn

  • 中图分类号: TB332

Modification of carbon fiber by microwave and its effect on interfacial properties of electron beam cured CFRP

Funds: National Natural Science Foundation of China (52075280)
  • 摘要: 电子束原位固化迎合“双碳”战略下碳纤维增强树脂基复合材料(CFRP)低成本控形控性的一体化制造需求,但却因固化构件界面质量差而尚未迈向工业化。本文围绕电子束固化CFRP弱界面的高效、高工业可行性强化技术,探索了微波短时辐射改性碳纤维改善界面的机制及工艺,阐明了碳纤维表面物理形貌、粗糙度及化学成分在不同微波辐射工艺参数下的演变规律:碳纤维表面的粗糙度和表面积,由未改性时的4.41 nm和7.5 nm2最高提高至微波辐射180 s后的21.7 nm和26.4 nm2;O/C原子比也由未改性时的0.2578最高增至辐射180 s时的0.3278。进一步地,构建了界面分子动力学模型,从分子层面细化并深化了羧基及羟基强化界面的本质,及其对界面结构及界面能的影响。界面剪切强度测试结果表明,在微波辐射(90 s)的物理及化学改性双重作用下,碳纤维/树脂界面获得了20.47%的提高。该研究为高性能电子束固化CFRP的绿色成型制造提供基础与支撑,具有重要的科学意义。

     

  • 图  1  AFM试样示意图

    Figure  1.  AFM specimen diagram

    图  2  碳纤维(CF)单丝拉伸强度测试

    Figure  2.  Carbon fiber (CF) monofilament tensile strength test

    F—Force

    图  3  界面剪切强度实验

    Figure  3.  Interfacial shear strength test

    图  4  碳纤维增强树脂基复合材料(CFRP)分子动力学模型

    Figure  4.  Molecular dynamics models of carbon fiberreinforced polymer (CFRP)

    图  5  不同微波辐射时间下CF表面微观形貌图及沟壑特征分析

    Figure  5.  Surface morphology and furrow characteristics of CFs at different microwave irradiation times

    Δx—Groove width; Δz—Groove depth

    图  6  不同微波辐射时间下CF表面粗糙度及表面积

    Figure  6.  Surface roughness and area of CF at different microwave irradiation time

    图  7  不同微波辐射时间下CF表面官能团含量

    Figure  7.  Group contents of CF surfaces at different microwave irradiation time

    图  8  CF与树脂分子间的静电吸附作用

    Figure  8.  Electrostatic interactions between CF and resin molecules

    图  9  CF及树脂分子在纤维表面法向的浓度分布

    Figure  9.  Molecular concentration distribution of CF and epoxy resin along CF surface normal direction

    图  10  不同微波辐射时间下CF/树脂界面能

    Figure  10.  Interfacial energy between CF/epoxy resin at different microwave irradiation time

    图  11  不同微波辐射时间下CFRP界面剪切强度(IFSS) (a)及单因素方差(ANOVA)分析结果 (b)

    Figure  11.  Interfacial shear strength (IFSS) at different microwave irradiation time (a) and one-way analysis of variance (ANOVA) analysis results (b)

    图  12  IFSS测试后碳纤维/树脂界面的微观形貌

    Figure  12.  Microscopic morphologies of CFRP interface after IFSS tests

    表  1  不同微波辐射时间下CF表面氧碳原子比

    Table  1.   O/C atomic ratio of CF surface at different microwave irradiation time

    Microwave
    irradiation time/s
    0306090120180
    O/C0.25780.26710.28560.30930.31410.3278
    下载: 导出CSV

    表  2  不同微波辐射时间下CF与树脂的非键作用能

    Table  2.   Nonbonding energy between CF and epoxy resin at different microwave irradiation time

    ModelI(0)I(30)I(60)I(90)I(120)I(180)
    Nobonding energy/(kcal·mol−1)−472.152−479.332−498.493−517.594−519.104−514.347
    Van der waals energy/(kcal·mol−1)−374.251−373.541−380.201−382.984−377.877−373.692
    Electrostatic energy/(kcal·mol−1)−97.901−105.791−118.284−134.61−141.217−140.655
    Notes: I(t)—Specimens with CFs irradiated by microwave for t seconds; t—Microwave irradiation time (s).
    下载: 导出CSV

    表  3  不同微波辐射时间下CF单丝的拉伸强度

    Table  3.   CF monofilament tensile strength at different microwave irradiation time

    Microwave irradiation
    time/s
    0306090120180
    Tensile strength/GPa5.2965.3285.2145.1724.9914.84
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-08-03
  • 修回日期:  2022-09-05
  • 录用日期:  2022-09-11
  • 网络出版日期:  2022-09-23
  • 刊出日期:  2023-07-15

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