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Non-corrosive green lubricants: strengthened lignin-[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding

机译:非腐蚀性绿色润滑剂:加强木质素 - [胆碱] [氨基酸]离子液体互动通过互易氢键相互作用

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摘要

A series of novel green lubricants with dissolved lignin in [choline][amino acid] ([CH][AA]) ionic liquids (ILs) have been synthesized in this work. The effect of lignin on the thermal and tribological properties of the lignin/[CH][AA] lubricants was systematically investigated by means of thermogravimetric analysis, differential scanning calorimetry, and a friction and wear tester. The lignin in [CH][AA] has been demonstrated to be an effective additive to improve thermal stability, reduce the wear rates and stabilize the friction coefficients of lignin/[CH][AA] lubricants. Density function theory calculations on the electronic structure of [CH][AA] ILs reveal the atomic natural charge of ILs and their hydrogen bonding capability with lignin. Moreover, these green lubricants show excellent anti-corrosive properties against commercial aluminum and iron boards. The strong physical adsorption of [CH][AA] ILs onto the steel surface and the reciprocal hydrogen bonding between [CH][AA] ILs and lignin synergistically contribute to the enhanced lubrication film strength and thus the tribological properties of these new lubricants. This work provides a new perspective on utilizing complete bio-products in advanced tribological lubrication systems. In addition, this will open a new application venue for lignin to improve product value in lignocellulosic biomass utilization.
机译:在[Choline] [氨基酸]([CH] [AA])([CH] [AA])离子液体(ILS)中已经合成了一系列具有溶解的木质素的新型绿色润滑剂。通过热量分析,差示扫描量热法和摩擦和磨损测试仪系统地研究了木质素对木质素/ [AA]润滑剂的热和摩擦学性质的影响。 [CH] [AA]中的木质素已被证明是一种有效的添加剂,以提高热稳定性,降低磨损率并稳定木质素/ [AA]润滑剂的摩擦系数。密度函数理论计算[CH] [AA] ILS的电子结构揭示了ILS的原子自然电荷及其与木质素的氢键能力。此外,这些绿色润滑剂对商业铝和铁板显示出优异的防腐蚀性。 [CH] [AA] ILS在钢表面上的强物理吸附和[CH] [AA] ILS和木质素之间的往复氢键合协同促进增强的润滑膜强度,从而有助于这些新润滑剂的摩擦学性质。这项工作提供了一种利用先进摩擦润滑系统中完整的生物产品的新视角。此外,这将打开木质素的新应用场地,以提高木质纤维素生物质利用的产品价值。

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  • 来源
    《RSC Advances》 |2015年第81期|共6页
  • 作者单位

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

    Lulea Univ Technol Div Machine Elements S-97187 Lulea Sweden;

    Chinese Acad Sci Shanghai Inst Appl Phys Shanghai 201800 Peoples R China;

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

    Northeast Petr Univ Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Univ Akron Dept Chem &

    Biomol Engn Intelligent Composites Lab Akron OH 44325 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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