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首页> 外文期刊>Advanced materials interfaces >Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives
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Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives

机译：共价官能化氮化硼纳米液作为高效润滑油添加剂

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摘要

Hexagonal boron nitride nanosheets (h-BNNSs) are obtained by a chemical exfoliation method from bulk h-BN powders. The surface of h-BNNSs is functionalized with 3-aminopropyltriethoxysilane (APTS). Further, the amino functional groups on the surface of APTS-modified h-BNNSs (APTS-BNNSs) are reacted with 4-carboxyphenylboronic acid (CPBA) to obtain the covalently linked CPBA-BNNSs. The morphology and structure of h-BNNSs, APTS-BNNSs, and CPBA-BNNSs are comprehensively discussed. Of all the above four additives, the CPBA-BNNSs can most outstandingly improve friction-reducing and antiwear capacities of 150N base oil. The CPBA-BNNSs possess excellent dispersion stability in base oil due to the phenylboronic acid groups on the surface of h-BNNSs. Only 0.075 wt% CPBA-BNNSs is added into the base oil, the coefficient of friction is decreased by 32.3%, and the wear scar diameter and mean wear volume of the rubbing surface are reduced by 42.9% and 88.4%. The analysis of the worn scar surface demonstrates that CPBA-BNNSs can form a protective tribofilm containing boron and nitrogen elements on the rubbing surfaces, thereby decreasing the friction and protecting the surfaces from wear. Thus, the CPBA-BNNSs may be recommended as a potential lubricant additive in practical applications.
机译：六边形氮化硼纳米片（H-BNNS）通过来自本体H-BN粉末的化学剥离方法获得。 H-BNNS的表面用3-氨基丙基三乙氧基硅烷（APTS）官能化。此外，APTS改性的H-BNNSS（APTS-BNNSS）表面上的氨基官能团与4-羧基苯甲酸（CPBA）反应，得到共价连接的CPBA-BNNS。全面讨论了H-BNNSS，APTS-BNNS和CPBA-BNNS的形态和结构。在所有上述四种添加剂中，CPBA-BNNS最突出地改善了150N基础油的摩擦降低和抗磨能力。由于H-BNNSS表面上的苯基硼酸基团，CPBA-BNNSS在基础油中具有优异的分散稳定性。在基础油中加入仅0.075wt％的CpBA-BNNS，摩擦系数减少32.3％，摩擦瘢痕直径和摩擦表面的平均磨损体积减少42.9％和88.4％。磨损瘢痕表面的分析表明CPBA-BNNS可以在摩擦表面上形成含硼和氮素元件的保护性呋喃木，从而降低摩擦和保护表面免受磨损。因此，可以推荐CPBA-BNNS作为实际应用中的潜在润滑剂添加剂。

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