材料科学
极限抗拉强度
芳纶
纳米复合材料
复合材料
扫描电子显微镜
纳米纤维
环氧树脂
丙烯酸酯
傅里叶变换红外光谱
透射电子显微镜
化学工程
聚合物
共聚物
纳米技术
纤维
工程类
作者
Ying Wang,Zhenxing Sun,Peixu Yin,Rongjun Qu,Ying Zhang,Changmei Sun
出处
期刊:Nanomaterials
[Multidisciplinary Digital Publishing Institute]
日期:2023-11-16
卷期号:13 (22): 2960-2960
被引量:4
摘要
In order to enhance the mechanical properties of UV-curable epoxy acrylate (EA)-based coatings, 3-(trimethoxysilyl)propyl methacrylate modified aramid nanofibers (T-ANFs) were synthesized and used as nanofillers to prepare EA/T-ANF nanocomposite films. The morphology of T-ANFs was characterized by transmission electron microscopy. The chemical structure of T-ANFs was analyzed via infrared spectroscopy, confirming successful grafting of methyl methacryloyloxy groups onto the surface of aramid nanofibers (ANFs). Real-time infrared spectroscopy was employed to investigate the influence of ANFs and T-ANFs on the photopolymerization kinetics of the EA film. The results revealed that the addition of ANFs and T-ANFs led to a decrease in the photopolymerization rate during the initial stage but had little impact on the final double bond conversion, with all samples exhibiting a conversion rate of over 83%. The incorporation of ANFs improved the tensile strength of the films while significantly reducing their Young’s modulus. In contrast, the addition of T-ANFs led to a substantial increase in both tensile stress and Young’s modulus of the films. For instance, the tensile strength and Young’s modulus of the 0.1 wt% of T-ANF film increased by 52.7% and 41.6%, respectively, compared to the pure EA film. To further study the dispersion morphology and reinforcement mechanism, the cross-sectional morphology of the films was characterized by scanning electron microscopy.
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