含MWCNTs玻璃纤维增强复合材料的力学和界面性能的研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (12): 83-88.

含MWCNTs玻璃纤维增强复合材料的力学和界面性能的研究

郑益飞, 申明霞^*, 段鹏鹏, 曾少华

河海大学力学与材料学院,南京211100

收稿日期:2019-04-18 出版日期:2019-12-28 发布日期:2019-12-28
通讯作者: 申明霞(1966-),女,博士,教授,主要从事微/纳米粒子改性和聚合物复合材料制备、性能、界面及其应用方面的研究,mxshen@hhu.edu.cn。
作者简介:郑益飞(1994-),男,硕士,主要从事碳纳米管改性玻璃纤维增强环氧复合材料性能方面的研究。
基金资助:
中央高校基本科研业务费专项资金(2016B45414)

STUDY ON MECHANICAL AND INTERFACIAL PROPERTIES OF GLASS FIBER REINFORCED COMPOSITES CONTAINING MWCNTs

ZHENG Yi-fei, SHEN Ming-xia^*, DUAN Peng-peng, ZENG Shao-hua

College of Mechanics and Materials, Hohai University, Nanjing 211100, China

Received:2019-04-18 Online:2019-12-28 Published:2019-12-28

摘要/Abstract

摘要： 为了进一步提高玻璃纤维增强环氧复合材料(GFRE)的力学性能,本文将工业级多壁碳纳米管(MWCNTs)均匀分散在含分散剂B60T的环氧树脂(EP)中,制备了MWCNTs/GFRE复合材料。研究了MWCNTs官能团种类和含量对GFRE宏观和微观力学性能的影响,并对复合材料界面粘合性进行了分析。结果表明:官能化MWCNTs可以明显提高GFRE的力学性能和层间粘合强度,羟基化碳纳米管(MWCNTs-OH)对GFRE的力学性能和层间剪切强度提升最明显;与GFRE相比,当MWCNTs-OH用量为0.1wt%时,MWCNTs-OH/GFRE的拉伸强度和弯曲强度分别提高了51.9%和31.2%,拉伸模量和弯曲模量分别提高了9.1%和5.2%,层间剪切强度提高了23.9%;动态粘弹性研究表明,与GFRE相比,MWCNTs-OH/GFRE的初始模量提升了约10.1%,玻璃化温度提高约4.8 ℃;MWCNTs对MWCNTs/GFRE界面结合和耐温性的提高,与其官能团数量、种类及其与环氧分子的反应难易以及形成的化学键自由度有关。

关键词: 复合材料, 玻璃纤维, 环氧树脂, 多壁碳纳米管, 力学性能

Abstract: In order to improve the comprehensive properties of glass fiber reinforced epoxy composites (GFRE), industrial multi-walled carbon nanotubes (MWCNTs) were dispersed uniformly in EP by adding dispersant B60T, and then glass fiber reinforced epoxy composites containing MWCNTs (MWCNTs/GFRE) were fabricated. The effects of functional groups and content of MWCNTs on the macro and micro mechanical properties of GFRE were further studied, and the interfacial adhesion of the composites was also evaluated. The results showed that functionalized MWCNTs can significantly improve the mechanical properties and interlaminar bonding strength of GFRE, and the hydroxylated MWCNTs (MWCNTs-OH) has the most obvious improvement in mechanical properties and interlaminar shear strength (ILSS) of GFRE. When the addition amount of MWCNTs-OH was 0.1wt%, the tensile strength and flexural strength of MWCNTs-OH/GFRE were increased by 51.9% and 31.2%, respectively, the tensile modulus and flexural modulus were improved by 9.1% and 5.2%, respectively, and the ILSS was raised by 23.9%, as compared with pure GFRE composites. Dynamic viscoelastic studies showed that the initial storage modulus (E′) and the glass transition temperature (T_g) of MWCNTs-OH/GFRE were increased by 10.1% and 4.8 ℃ compared with GFRE, respectively. The increase of interfacial adhesion and temperature resistance of MWCNTs/GFRE is suggested to be related to the content and type of functional groups of MWCNTs, the difficulty of reaction with epoxy molecule and the freedom of chemical bonds formed between MWCNTs and EP.

Key words: composite, glass fiber, epoxy resin, multi-walled carbon nanotubes, mechanical property

中图分类号:

TB332

郑益飞, 申明霞, 段鹏鹏, 曾少华. 含MWCNTs玻璃纤维增强复合材料的力学和界面性能的研究[J]. 玻璃钢/复合材料, 2019, 0(12): 83-88.

ZHENG Yi-fei, SHEN Ming-xia, DUAN Peng-peng, ZENG Shao-hua. STUDY ON MECHANICAL AND INTERFACIAL PROPERTIES OF GLASS FIBER REINFORCED COMPOSITES CONTAINING MWCNTs[J]. Fiber Reinforced Plastics/Composites, 2019, 0(12): 83-88.

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