纳米填料对不同老化条件下碳纤维/环氧树脂复合材料力学性能的影响。

Effect of Nanofiller on the Mechanical Properties of Carbon Fiber/Epoxy Composites under Different Aging Conditions.

作者信息

Yang Tian, Lu Shijian, Song Da, Zhu Xianyong, Almira Israpil, Liu Jiaan, Zhu Ying

机构信息

Key Laboratory of Automobile Materials (Ministry of Education), College of Materials Science and Engineering, Jilin University, Changchun 130022, China.

School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China.

出版信息

Materials (Basel). 2021 Dec 17;14(24):7810. doi: 10.3390/ma14247810.

DOI:10.3390/ma14247810

PMID:34947404

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8708597/

Abstract

In this study, carbon fiber-reinforced epoxy composites (CFRPs) containing multi-walled carbon nanotube (MWCNT) and halloysite nanoclay were fabricated. The effects of these nanofillers (MWCNT and nanoclay) on the tensile and flexural properties of the CFRPs under different aging conditions were studied. These aging conditions included water soaking, acid soaking, alkali soaking, and thermal shock cycling. The experimental results showed that, after accelerated aging, the mechanical performance of the CFRPs decreased. The performance degradation in the soaking environment depends on the immersion temperature and immersion medium. High-temperature accelerated the aging behavior of the CFRPs, resulting in low strength and modulus. The CFRPs were more vulnerable to acid soaking and alkali soaking than water soaking. The MWCNT and halloysite nanoclay are beneficial to improve the immersion aging resistance of the CFRPs, and the additions of nanofillers delayed the performance degradation under immersion aging conditions. However, nanofillers hardly improve the aging resistance of the CFRPs under thermal shock cycling condition. The fracture morphologies were observed by scanning electron microscopy (SEM) to reflect the failure modes of the CFRPs under various aging conditions. Differential scanning calorimeter (DSC) and fourier transform infrared (FTIR) spectroscopy tests were used to estimate the changes in the chemical structures and properties of epoxy resin and its composites under different conditions.

摘要

在本研究中，制备了含有多壁碳纳米管（MWCNT）和埃洛石纳米黏土的碳纤维增强环氧树脂复合材料（CFRP）。研究了这些纳米填料（MWCNT和纳米黏土）在不同老化条件下对CFRP拉伸和弯曲性能的影响。这些老化条件包括水浸泡、酸浸泡、碱浸泡和热冲击循环。实验结果表明，加速老化后，CFRP的力学性能下降。浸泡环境中的性能退化取决于浸泡温度和浸泡介质。高温加速了CFRP的老化行为，导致强度和模量降低。CFRP在酸浸泡和碱浸泡下比水浸泡更易受损。MWCNT和埃洛石纳米黏土有利于提高CFRP的耐浸泡老化性能，纳米填料的添加延缓了浸泡老化条件下的性能退化。然而，纳米填料在热冲击循环条件下几乎不能提高CFRP的抗老化性能。通过扫描电子显微镜（SEM）观察断裂形貌，以反映CFRP在各种老化条件下的失效模式。采用差示扫描量热仪（DSC）和傅里叶变换红外（FTIR）光谱测试来评估环氧树脂及其复合材料在不同条件下化学结构和性能的变化。