Effect of repeated hydrothermal cycling on the durability of glass fiber/epoxy composites with and without carbon nanotube reinforcement,Polymer Composites

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Effect of repeated hydrothermal cycling on the durability of glass fiber/epoxy composites with and without carbon nanotube reinforcement
Polymer Composites ( IF 4.8 ) Pub Date : 2021-09-04 , DOI: 10.1002/pc.26293
Abhinav Omprakash Fulmali ₁ , Bhaskar Sen ₁ , B. Arnimesh Nayak ₁ , Rajesh Kumar Prusty _{1,

2}

Affiliation

Enhancing the performance of polymeric composites by incorporating carbon nanotube (CNT) is a current research trend. In this article, the performance of glass fiber reinforced epoxy (GE) composite with and without CNT has been observed under repeated hydrothermal cycling (HC) between 15 and 50°C water baths. Before carrying out the HC, the optimum concentration of CNT in the GE composite was obtained by flexural test. This study first confirms that the addition of 0.1 wt% of CNTs resulted in a 6.68% and 6.47% increment in flexural strength and modulus compared to neat GE composite. Alteration in the performance of the neat GE and 0.1 wt% CNT-GE was then analyzed after performing HC for 20, 40, and 60 cycles by conducting mechanical (flexural), thermomechanical (dynamic mechanical thermal analysis [DMA]), chemical (Fourier transform infrared spectroscopy [FTIR]) and fractographic (scanning electron microscopy [SEM]) analysis. Degradation in the mechanical performance of the CNT embedded GE composite was found to be faster than the neat one with the increasing number of HC. The possible reason has been explained based on the evidence obtained from DMA, FTIR, and SEM analysis.

中文翻译：

反复水热循环对有和无碳纳米管增强的玻璃纤维/环氧树脂复合材料耐久性的影响

通过加入碳纳米管 (CNT) 来提高聚合物复合材料的性能是当前的研究趋势。在本文中，在 15 至 50°C 水浴之间反复水热循环 (HC) 下观察了含和不含 CNT 的玻璃纤维增强环氧树脂 (GE) 复合材料的性能。在进行 HC 之前，通过弯曲试验获得了 GE 复合材料中 CNT 的最佳浓度。该研究首先证实，与纯 GE 复合材料相比，添加 0.1 wt% 的 CNT 导致弯曲强度和模量增加 6.68% 和 6.47%。在进行 HC 20、40 和 60 次循环后，通过进行机械（弯曲）、热机械（动态机械热分析 [DMA]）、化学（傅里叶变换红外光谱 [FTIR]）和断口（扫描电子显微镜 [SEM]）分析。发现随着 HC 数量的增加，嵌入 CNT 的 GE 复合材料的机械性能的退化比纯的要快。已经根据从 DMA、FTIR 和 SEM 分析获得的证据解释了可能的原因。

更新日期：2021-11-09

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