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Preparation of in-situ grown carbon nanotubes via dithiocarbamate in composites with excellent microstructure and mechanical performance
Composites Science and Technology ( IF 8.3 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.compscitech.2020.108569
Shengjie Guan , Zhengxiang Zhong , Jun Li , Yaoyuan Xu , Lei Ding , Yudong Huang , Li Liu

Abstract Dithiocarbamate binding to nickel was successfully synthesized on the surface of carbon fibers acting as the catalyst of carbon nanotubes via two feasible strategy, including typical one–step method with metal hydroxide and green mild Markovnikov addition procedure using ethyl vinyl ether. The positive effects of modified carbon fibers were investigated, consisting of microstructure, roughness, and surface energy, etc. Further, carbon fiber composites with carbon nanotubes grown in-situ were prepared by combining methylphenyl silicone and phenolic resin, then undergoing a hyperthermal sintering process. The surface morphologies proved that the microstructure of composites changed dramatically due to substantial carbon nanotube whiskers. Furthermore, the mechanical performance of high temperature treated composite materials with higher modulus and strength had been enhanced, which the compressive strength and interlaminar shear strength could reach approximately 20 MPa (further up to 150%) and 10 MPa (120%). The modification of carbon fibers and growth of CNTs in-situ would contribute to competitive application of resin-based composites in the field of thermal bearing and insulation.

中文翻译:

通过二硫代氨基甲酸酯原位生长碳纳米管制备具有优异微观结构和机械性能的复合材料

摘要 通过两种可行的策略,包括典型的金属氢氧化物一步法和使用乙基乙烯基醚的绿色温和马尔科夫尼科夫加成法,在作为碳纳米管催化剂的碳纤维表面成功合成了二硫代氨基甲酸酯与镍的结合。研究了改性碳纤维的积极影响,包括微观结构、粗糙度和表面能等。此外,通过结合甲基苯基硅树脂和酚醛树脂,然后进行高温烧结过程制备了具有原位生长碳纳米管的碳纤维复合材料. 表面形貌证明,由于大量的碳纳米管晶须,复合材料的微观结构发生了显着变化。此外,高温处理后具有更高模量和强度的复合材料的力学性能得到增强,其抗压强度和层间剪切强度可达到约20 MPa(进一步达到150%)和10 MPa(120%)。碳纤维的改性和碳纳米管的原位生长将有助于树脂基复合材料在热承载和绝缘领域的竞争应用。
更新日期:2021-02-01
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