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首页> 外文期刊>RSC Advances >Facile fabrication of long-chain alkyl functionalized ultrafine reduced graphene oxide nanocomposites for enhanced tribological performance
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Facile fabrication of long-chain alkyl functionalized ultrafine reduced graphene oxide nanocomposites for enhanced tribological performance

机译：长链烷基官能化超细氧化石墨纳米复合材料的体面的制造，提高摩擦学性能

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摘要

Due to their ultrathin 2D laminated structure as well as excellent mechanical and thermal stabilities, ultrafine graphene-based nanoparticles exhibit fascinating advantages as highly-efficient lubricant additives. However, it remains a daunting challenge to achieve good and durable dispersion of these graphene-based nanoparticles in lubricating oils. Herein, we report a facile and efficient integration strategy involving particle size miniaturization, surface grafting with octadecyl alcohol (OA), and partial chemical reduction to prepare a novel long-chain alkyl functionalized ultrafine reduced graphene oxide (RGO-g-OA) with highly-dispersive capacity and superior tribological performance. The chemical composition and structural characteristics, microstructural morphology, and particle size distribution of RGO-g-OA were systematically investigated. Combining significantly improved lipophilicity derived from the long-chain alkyl grafting and partial chemical reduction with the small-size effect gave rise to outstanding long-term dispersion stability (as long as one month) of RGO-g-OA in the finished oil. Moreover, the friction coefficient and wear volume of finished oil with merely 0.005wt% RGO-g-OA greatly reduced to 0.065 and 10316 m(3), decreased by 9.7% and 44%, respectively, compared to those of pristine finished oil, demonstrating remarkable friction reduction and anti-wear performances. Consequently, owing to the characteristics of facile fabrication, durable dispersion stability, and superior tribological performance at an extremely low content, this novel nanoadditive shows a promising application potential in the tribology field.
机译：由于其超薄的2D层压结构以及出色的机械和热稳定性，超细石墨烯的纳米粒子表现出令人着迷的优点，作为高效润滑剂添加剂。然而，在润滑油中实现这些基于石墨烯的纳米颗粒的良好和耐用分散仍然是一种艰巨的挑战。在此，我们报告了涉及粒度小型化的容易和有效的整合策略，用十八烷基醇（OA）表面接枝，以及部分化学还原，以高度高度地制备新的长链烷基官能化超细氧化物（RGO-G-OA）。 - 能力和卓越的摩擦学性能。系统地研究了rgo-G-OA的化学成分和结构特征，微观结构形态和粒度分布。结合显着改善衍生自长链烷基嫁接和部分化学降低的亲脂性与小尺寸效应产生的偏出的长期分散稳定性（只需一个月）的成品油中的RGO-G-OA。此外，与原始成品油相比，成品油仅为0.005wt％的RGO-G-OA的摩擦系数和磨损体积大约0.005wtg％的rgo-g-oa，分别降低了9.7％和44％，展示了显着的摩擦减少和抗磨表演。因此，由于耐用的制造，耐用的分散稳定性和优异的摩擦学性能在极低的内容中，这种新颖的纳米彩色显示了摩擦学领域的有希望的应用潜力。

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  • 来源
    《RSC Advances》 |2019年第13期|共10页
  • 作者

    Zhu Chao; Yan Yehai; Wang Fan; Cui Jian; Zhao Shuai; Gao Ailin; Zhang Guangfa;

  • 作者单位

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Key Lab Rubber Plast Minist Educ Shandong Prov Key Lab Rubber Plast Sch Polymer Sc Qingdao 266042 Shandong Peoples R China;

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