| CFRP层间碳纳米管定向喷涂工艺及断裂韧性研究 |
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| 引用本文： | 蒋鹏,王仲奇,常正平,杨宗琪,周旭,冯征昊.CFRP层间碳纳米管定向喷涂工艺及断裂韧性研究[J].复合材料学报,2021,38(2):496-505. |
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| 作者姓名： | 蒋鹏 王仲奇 常正平 杨宗琪 周旭 冯征昊 |
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| 作者单位： | 西北工业大学机电学院,西安710072;伯明翰大学冶金与材料学院,伯明翰B152TT |
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| 基金项目： | 陕西省重点研发计划(2019ZDLGY02-02);硕士研究生创意创新种子基金(ZZ2019096)。 |
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| 摘 要： | 为了提高碳纤维增强树脂基复合材料(CFRP)层间性能，采用共沉淀法在碳纳米管上接枝磁性Fe3O4粒子，通过定向喷涂工艺使磁性碳纳米管(Fe3O4-MWCNTs)在碳纤维表面取向一致，并喷涂树脂加以固定，形成碳纤维-定向碳纳米管-树脂界面，采用真空辅助树脂渗透成形(Vacuum assisted resin infusion, VARI)工艺制备层间性能优异的Fe3O4-MWCNTs层间定向增强CFRP。试验结果表明，喷涂树脂可改善和巩固定向喷涂工艺。与未加磁场喷涂工艺相比，当Fe3O4-MWCNTs的质量分数为0.3wt%时，采用定向喷涂工艺试件的I型层间断裂韧性(GIC)提升幅度最大，GIC提高了37.7%。断面形貌分析表明其增强机制以树脂的塑性变形、Fe3O4-MWCNTs棒状聚集体的拔出及树脂塑性孔洞的生长为主。该研究为具有可控定向行为的磁性碳纳米管改性CFRP层间力学性能提供了新思路与方法。
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| 关 键 词： | CFRP 磁性碳纳米管 喷涂工艺 界面改性 断裂韧性 |
| 收稿时间： | 2020-04-23 |
Interlaminar aligned carbon nanotubes spraying process and fracture toughness of CFRP |
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| JIANG Peng,WANG Zhongqi,CHANG Zhengping,YANG Zongqi,ZHOU Xu,FENG Zhenghao.Interlaminar aligned carbon nanotubes spraying process and fracture toughness of CFRP[J].Acta Materiae Compositae Sinica,2021,38(2):496-505. |
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| Authors: | JIANG Peng WANG Zhongqi CHANG Zhengping YANG Zongqi ZHOU Xu FENG Zhenghao |
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| Affiliation: | 1.School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China2.University of Birmingham, School of Metallurgy and Materials, Birmingham B15 2TT, Britain |
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| Abstract: | Co-precipitation method was applied for grafting magnetic Fe3O4 particles on carbon nanotubes. In order to improve the interlayer properties of carbon fiber reinforced polymer(CFRP), the magnetic carbon nanotubes(Fe3O4-MWCNTs) were aligned on the surface of carbon fiber by spraying process after exposure to magnetic field to form ‘carbon fiber-aligned carbon nanotubes-resin’ interface, and were fixed by spraying the resin. Aligned Fe3O4-MWCNTs-reinforced CFRP with excellent interlaminar properties was prepared by vacuum assisted resin infusion(VARI) molding. The test results show spraying resin plays an important role in consolidating and improving aligned spraying process. Compared with non-magnetic spraying process, when the mass fraction of Fe3O4-MWCNTs is 0.3 wt%, the mode I interlaminar fracture toughness(GIC) increases by up to 37.7%. The main toughening mechanisms, which are pull-out and rupture of Fe3O4-MWCNTs aggregates, plastic deformation and plastic void growth of resin, are revealed by the fracture surface morphology. The research provides a new idea and method for interface modification of CFRP by adding Fe3 O4-MWCNTs with controlled aligned behavior. |
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| Keywords: | CFRP magnetic carbon nanotubes spraying process interface modification fracture toughness |
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