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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Fabrication and characterization of carbon/epoxy composites mixed with multi-walled carbon nanotubes
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Fabrication and characterization of carbon/epoxy composites mixed with multi-walled carbon nanotubes

机译：碳/环氧复合材料与多壁碳纳米管混合的制备与表征

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In this study, a high-intensity ultrasonic liquid processor was used to obtain a homogeneous mixture of epoxy resin and multi-walled carbon nanotubes (CNTs). The CNTs were infused into epon 862 epoxy resin through sonic cavitation and then mixed with W curing agent using a high-speed mechanical agitator. The trapped air and reaction volatiles were removed from the mixture using a high vacuum. Flexural tests and fracture toughness tests were performed on unfilled and CNT-filled epoxy to identify the effect of adding CNTs on the mechanical properties of epoxy. The highest improvement in strength and fracture toughness was obtained with 0.3 wt% CNT loading. The nanophased matrix filled with 0.3 wt% CNT was then used with weave carbon fabric in a vacuum-assisted resin transfer molding (VARTM) set up to fabricate composite panels. Flexural tests, thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA) were performed to evaluate the effectiveness of adding CNTs on the mechanical and thermal properties of the composite. The glass transition temperature, decomposition temperature, and flexural strengths were improved by infusing CNTs. Based on the experimental result, a linear damage model has been combined with the Weibull distribution function to establish a constitutive equation for neat and nanophased carbon/epoxy. Simulated result show that that infusing CNTs increases Weiubll scale parameter, but decrease Weibull shape parameter.
机译：在这项研究中，使用高强度超声液体处理器来获得环氧树脂和多壁碳纳米管（CNT）的均匀混合物。通过声空化将CNT注入epon 862环氧树脂中，然后使用高速机械搅拌器将其与W固化剂混合。使用高真空从混合物中除去截留的空气和反应挥发物。对未填充的和CNT填充的环氧树脂进行了挠曲测试和断裂韧性测试，以确定添加CNT对环氧树脂的机械性能的影响。在0.3wt％的CNT负载下，获得了强度和断裂韧性的最高改善。然后，将填充有0.3 wt％CNT的纳米相基质与碳纤维织物一起用于真空辅助树脂传递模塑（VARTM）中，以制造复合面板。进行挠曲测试，热重分析（TGA）和动态力学分析（DMA），以评估添加CNT对复合材料的机械和热性能的有效性。通过注入CNT可以改善玻璃化温度，分解温度和弯曲强度。根据实验结果，将线性损伤模型与Weibull分布函数结合起来，建立了纯的和纳米相的碳/环氧树脂的本构方程。模拟结果表明，注入碳纳米管可以增加Weiubll尺度参数，但可以减小Weibull形状参数。

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