合成大米颗粒双金属镍/铁植硅酸盐,以同时润滑和强化环氧基复合材料

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Peng Jin, Jinian Yang, Weilong Chen, Shibin Nie
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引用次数: 0

摘要

为了改善环氧树脂不佳的润滑性能,本文介绍了一种新型双金属植硅体的制备方法,这种植硅体具有独特的米粒状形态,并通过简单的水热法将镍和铁金属阳离子结合在一起。然后,这些植硅体被整合到环氧树脂基体中形成复合材料。对目标产品进行的综合分析验证了水稻粒状双金属镍/铁植硅酸盐合成策略的合理性,表明在水稻粒状金属有机框架的平坦表面上原位生长着无数微小的镍/铁植硅酸盐纳米片,形成了均匀的分层结构。镍/铁植硅酸盐的充分添加可使其在基质中实现良好的分散,并建立起牢固的结合界面,从而稳步提高弹性模量和硬度。值得注意的是,当填料含量达到 7% 时,平均摩擦系数从纯树脂的 0.515 降至复合材料的 0.450,这表明固体润滑效果显著。相比之下,仅添加 1%的硅酸镍/硅酸铁就能适度提高耐磨性、断裂伸长率和拉伸强度。此外,研究还发现,随着填料含量的增加,失重率降低了约 43.8%,而残炭增加了 74.2%,从而显著提高了环氧树脂复合材料在高温下的热稳定性。该研究为制备具有良好机械性能和热性能的自润滑环氧树脂复合材料提供了一种可行的方法。只需较低的 NiFePS 含量,就能获得优异的复合材料机械性能。摩擦系数和磨损率明显降低。摩擦机理为固体润滑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of rice‐granular bimetallic nickel/iron phyllosilicates to simultaneously lubricate and strengthen the epoxy‐based composites
To improve the subpar lubricating performance of epoxy resin, this paper presents the preparation of a novel bimetallic phyllosilicate featuring a distinctive rice‐granular morphology, which incorporates nickel and iron metal cations through a facile hydrothermal process. These phyllosilicates were then integrated into the epoxy matrix to form composites. A comprehensive analysis of the target product validates the rationality of the synthesis strategy for the as‐prepared rice‐granular bimetallic nickel/iron phyllosilicate, demonstrating a homogeneous hierarchical structure with numerous tiny nanosheets of nickel/iron phyllosilicate grown in situ on the flat surfaces of the rice‐granular metal–organic frameworks. An adequate addition of nickel/iron phyllosilicates allows for excellent dispersion within the matrix and establishes strongly bonded interfaces, steadily increasing the elastic modulus and hardness. Notably, the average friction coefficients decrease from 0.515 for the pure resin to 0.450 for the composites when the filler content reaches 7%, indicating a significant solid lubrication effect. In contrast, adding just 1% nickel/iron phyllosilicate moderately improves wear resistance, elongation at break, and tensile strength. Furthermore, it was found that as the filler content increased, the weight loss rate was reduced by approximately 43.8%, while the residual char increased by 74.2%, significantly enhancing the thermal stability of epoxy composites at high temperatures. This study offers a promising approach to preparing self‐lubricated epoxy composites with favorable mechanical and thermal properties.Highlights NiFePS was successfully synthesized via a facile two‐step self‐polymerization. Excellent mechanical properties of composites could be achieved with low content of NiFePS. The friction coefficient and wear rate were lowered remarkably. The friction mechanism was solid lubrication.
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来源期刊
Polymer Composites
Polymer Composites 工程技术-材料科学:复合
CiteScore
7.50
自引率
32.70%
发文量
673
审稿时长
3.1 months
期刊介绍: Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. PC brings you the details of developments in this rapidly expanding area of technology long before they are commercial realities.
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