稀土Ce接枝碳纳米管-碳纤维多尺度增强体对环氧树脂基复合材料界面性能的影响

李玮; 程先华

doi:10.13801/j.cnki.fhclxb.20200805.002

稀土Ce接枝碳纳米管-碳纤维多尺度增强体对环氧树脂基复合材料界面性能的影响

doi: 10.13801/j.cnki.fhclxb.20200805.002

李玮¹,
程先华^{1, 2, ,}

1.
上海交通大学　机械与动力工程学院，上海 200240
2.
清华大学　摩擦学国家重点实验室，北京 100084

基金项目: 国家自然科学基金 (51975359)；摩擦学国家重点实验摩擦学科学基金(SKLTKF17A02)

详细信息

通讯作者:
程先华，博士，教授，博士生导师，研究方向为纳米表面工程及摩擦学　E-mail：xhcheng@sjtu.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2020-05-18
- 录用日期: 2020-07-29
- 网络出版日期: 2020-08-06
- 刊出日期: 2020-11-15

Effect of rare earth Ce grafted carbon nanotubes-carbon fiber multi-scale reinforcement on interfacial properties of epoxy matrix composites

LI Wei¹,
CHENG Xianhua^{1, 2
, ,}

1.
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2.
State Key of Tribology, Tsinghua University, Beijing 100084, China

摘要

摘要: 将马来酰亚胺官能化的多壁碳纳米管(CNTs)和碳纤维(CF)混合并通过CeCl₃处理，得到CNTs-CF多尺度增强体，采用FTIR、XPS、SEM对增强体的表面物理化学状态进行表征；以环氧树脂(EP)为基体，通过模压法制备CNTs-CF/EP复合材料，对其力学性能和断口形貌进行分析，探讨CNTs-CF多尺度增强体对CNTs-CF/EP复合材料界面性能的影响。结果表明：通过Ce的桥接作用，可以将改性后的CNTs化学接枝在CF表面，以同时解决CF与树脂基体间界面结合弱及CNTs不易分散的问题，有效改善了增强体与基体间的界面性能。因此CNTs-CF/EP复合材料的拉伸强度和杨氏模量较CF/EP复合材料分别提高了36.76%和71.57%；较CeCl₃改性CF(RECF)/EP复合材料分别提高了24.79%和52.17%。采用稀土Ce的化学接枝法成功制备出CNTs-CF多尺度增强体，为获得高级轻质树脂基复合材料提供了一种环境友好的新方法。
- 碳纳米管(CNTs) /
- 碳纤维(CF) /
- CeCl₃ /
- CNTs-CF多尺度增强体 /
- 界面结合 /
- 力学性能
Abstract: The multi-walled carbon nanotubes (CNTs) functionalized with maleimide and carbon fibers (CF) were mixed and treated with CeCl₃ to obtain CNTs-CF multi-scale reinforcement. These reinforcements were characterized by FTIR, XPS and SEM. The CNTs-CF/epoxy (EP) composite was prepared by the molding method with EP as the matrix. The mechanical properties and fracture morphology of CNTs-CF/EP composite were analyzed to explore the influence of CNTs-CF multi-scale reinforcement on the interfacial properties of EP composite. The results show that the modified CNTs can be chemically grafted on the CF surface through the bridging effect of rare earth Ce to solve the problems of weak interface bonding between CF and resin matrix and CNTs not easy to disperse, effectively improving the interfacial performance between the reinforcement and matrix. Therefore, the tensile strength and Young’s modulus of CNTs-CF/EP composite are increased by 36.76% and 71.57% relative to those of CF/EP composite, respectively; 24.79% and 52.17% relative to those of CF modified by CeCl₃ (RECF)/EP composite, respectively. The chemical grafting method of rare earth Ce is successfully used to prepare CNTs-CF multi-scale reinforcement, which provides a new environment-friendly method for obtaining advanced lightweight resin matrix composites.
- carbon nanotubes (CNTs) /
- carbon fiber (CF) /
- CeCl₃ /
- CNTs-CF multi-scale reinforcement /
- interfacial bonding /
- mechanical properties

HTML全文

图 1 多壁碳纳米管(CNTs)与马来酰亚胺的Diels-Alder反应

Figure 1. Diels-Alder reaction of multi-walled carbon nanotubes (CNTs) with maleimide

下载: 全尺寸图片幻灯片

图 2 CNTs和马来酰亚胺官能化CNTs(M-CNTs)的FTIR和XPS图谱

Figure 2. FTIR and XPS spectra of CNTs and maleimide functionalised CNTs (M-CNTs)

下载: 全尺寸图片幻灯片

图 3 CF、RECF和CNTs-CF多尺度增强体的O 1s的XPS图谱

Figure 3. XPS spectra of O 1s of CF, RECF and CNTs-CF multi-scale reinforcement

下载: 全尺寸图片幻灯片

图 4 RECF 和CNTs-CF多尺度增强体的Ce与O成键示意图

Figure 4. Schematic diagram of Ce and O bonding of RECF and CNTs-CF multi-scale reinforcement

下载: 全尺寸图片幻灯片

图 5 CF、RECF和CNTs-CF多尺度增强体的SEM图像

Figure 5. SEM images of CF, RECF and CNTs-CF multi-scale reinforcement

下载: 全尺寸图片幻灯片

图 6 环氧树脂(EP)、CF/EP、RECF/EP和CNTs-CF/EP复合材料的力学性能

Figure 6. Mechanical properties of epoxy (EP), CF/EP, RECF/EP and CNTs-CF/EP composites

下载: 全尺寸图片幻灯片

图 7 CF/EP、RECF/EP和CNTs-CF/EP复合材料拉伸断裂截面的SEM图像

Figure 7. SEM images of tensile fracture cross section of CF/EP, RECF/EP and CNTs-CF/EP composites

下载: 全尺寸图片幻灯片

图 8 CF/EP、RECF/EP和CNTs-CF/EP复合材料的断裂机制模型

Figure 8. Fracture mechanism models of CF/EP, RECF/EP and CNTs-CF/EP composites

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表 1 CF、CeCl₃改性的CF (RECF)和CNTs-CF多尺度增强体表面元素种类和原子分数

Table 1. Types and atomic fractions of surface elements of CF, CF modified by CeCl₃ (RECF) and CNTs-CF multi-scale reinforcement at%

Element CF RECF CNTs-CF

C 85.59 71.90 77.49
N 3.21 5.91 3.39
O 11.06 18.96 16.05
Ce 0.14 3.23 3.07

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