微波快速合成掺氮洋葱状碳纳米球及其摩擦学行为研究

IF 10.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Fengqin Shang , Yang Sun , Zihan Yan , Jiayu Yao , Ruirui Yang , Yingjia Hu , Bingheng Chen , Hangyan Shen
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引用次数: 0

摘要

本研究提出了一种简单、快速制备掺氮碳纳米球(N-CNOs)的方法。通过微波加热萘、三聚氰胺和碳纤维的混合物 2 分钟,成功制备了 N-CNOs,其形态接近球形,具有多层洋葱状结构,平均直径为 197 nm。与 CNOs 相比,N-CNOs 的摩擦系数(COF)从 0.36 降至 0.31,磨损率从 1.03 × 10-5 降至 0.83 × 10-5 mm³/(N-m),分别降低了 14 % 和 19 %。当 N-CNOs 浓度从 4.0 wt% 增加到 16.0 wt% 时,N-CNOs 的 COF 和磨损率分别达到最小值(0.22 和 0.53 × 10-5 mm3/(N-m))。N-CNOs 优异的摩擦学性能得益于层间间距的增加(0.07 nm)和原子尺度的晶格错配,二者都削弱了层间相互作用,从而改善了润滑性能并减少了摩擦。这项研究不仅提出了一种新的 N-CNOs 制备方法,而且揭示了原子尺度的润滑机理,为其在润滑领域的应用提供了技术支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Rapid synthesis of onion-like nitrogen-doped carbon nanospheres with microwave and study of its tribological behavior

Rapid synthesis of onion-like nitrogen-doped carbon nanospheres with microwave and study of its tribological behavior
In this study, a simple and rapid method for the preparation of Nitrogen-doped carbon nanospheres (N–CNOs) was proposed. N–CNOs were successfully prepared by microwave heating the mixture of naphthalene, melamine, and carbon fibers for 2 min, which showed a nearly spherical morphology with a multi-layer onion-like structure, and the average diameter was 197 nm. Compared with CNOs, the coefficient of friction (COF) of N–CNOs decreased from 0.36 to 0.31 and the wear rate decreased from 1.03 × 10−5 to 0.83 × 10−5 mm³/(N·m), which decreased by 14 % and 19 %, respectively. When the N–CNOs concentration increased from 4.0 wt% to 16.0 wt%, the COF and wear rate of N–CNOs reached the minimum (0.22 and 0.53 × 10−5 mm3/(N·m)), respectively. The excellent tribological properties of N–CNOs were attributed to the increase of interlayer spacing (0.07 nm) and the atomic scale lattice mismatch, both of which weakened interlayer interactions, thereby improving lubrication performance and reducing friction. This study not only proposed a new preparation method for N–CNOs, but also revealed the lubrication mechanism at the atomic scale, providing a technical support for their application in the field of lubrication.
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来源期刊
Carbon
Carbon 工程技术-材料科学:综合
CiteScore
20.80
自引率
7.30%
发文量
0
审稿时长
23 days
期刊介绍: The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.
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