TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Lisha Liu,Longxia Wang,Shifan Sun,Yujuan Zhang,Chunli Zhang,Shengmao Zhang
The designed synthesis of ionic liquid-type organic molybdenum (IOMo) compounds was investigated for their tribological performance as additives in alkylated naphthalene base oil, and their performance was compared with commercial additives. When IOMo is combined with ZDDP as additive, they synergistically enhance its anti-friction properties and further improve its anti-wear performance effectively. By analyzing worn surface, coupled with the adsorption performance of the additive, the "adsorption-reaction-film formation" lubrication mechanism is proposed. IOMo forms strongly adsorbed ultra-thick adsorption film on the friction pair surface through electrostatic adsorption, effectively avoiding the running-in wear stage. During the friction process, frictional chemical reactions facilitate the formation of a complex boundary lubrication film, thereby demonstrating excellent anti-friction and anti-wear capabilities across the entire lubrication range.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Xia Li,Yi Li,Huimin Yang,Anjie Liu,Songwei Zhang,Litian Hu
The demand of high-performance additives suitable for lubricating grease is increasing with the development of high-end equipment. Herein, a novel thiophosphate 3-(O, O- di-nonylphenol di-thiophosphate)-2-methylpropanoic acid (NDMA) was synthesized and added to lithium complex grease as an extreme pressure and anti-wear additive. The physicochemical, rheological, and tribological properties of NDMA were studied and compared with ZDDP. The results indicate that NDMA can improve and enhance oil separation under pressure and dropping point. NDMA showed better shearing resistance, friction reducing, anti-wear and load carrying capability than ZDDP. The lubrication mechanism of NDMA was demonstrated through molecular dynamics simulation. The results indicate that NDMA has strong adsorption capacity on sliding surfaces, promoting the tribo-chemistry reaction between NDMA and iron surfaces.
研究领域:
材料科学
·
润滑工程
·
表面工程
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产品关联
DOI
高影响因子
TRIBOLOGY LETTERS
·
2019
·Vol. 67
·期 2
·58
·
IF 2.235
Jin Yongliang,Duan Haitao,Cheng Bingxue,Wei Lei,Tu Jiesong,Liu Jianfang,Li Jian
In this study, a multi-phenol antioxidant 2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenylthio)-1,3,5-triazine (THA) was synthesized. The thermal stability of THA and its oxidation resistance in triisodecyl trimellitate (TDTM) ester oil were evaluated compared with several commercial phenol antioxidants. Further investigations on the oxidation resistance and tribological performance of THA with dinonyl diphenylamine (Am) and ZDDP composites were conducted to determine the additive compatibility in TDTM. The results indicate that the THA possesses higher thermal stability and more effectiveness of oxidation resistance than the commercial phenol antioxidants. The synergistic anti-oxidative effect is confirmed for the THA/Am mixtures in TDTM ester oil. However, the addition of THA alone or THA/Am mixtures shows no improvement for the tribological performance of TDTM. Excitingly, the THA/Am/ZDDP composite additives not only have the superior oxidation resistance, but exhibit the effective friction and wear reductions. It suggests the excellent compatibility of the synthesized THA antioxidant with Am and ZDDP additives in TDTM ester oil.
研究领域:
材料化学
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润滑材料
·
应用化学
·
高分子化学
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表面科学
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机械工程
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石油化学
·
摩擦学
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DOI
高影响因子
LANGMUIR
·
2026
·Vol. 42
·期 28
·20814-20827
·
IF 4.4
Wu Chonglin,Hao Lei,Fan Kaitong,Zhang Chunfeng,Zhang Xiaojun,Xu Hong,Dong Jinxiang
Synthetic montmorillonite (MMT) was prepared via a hydrothermal
method and further modified through organic intercalation to obtain
organically modified montmorillonite (OMMT). Using OMMT as an oil
additive, four-ball tribological tests showed that both alkyl chain
length and intercalation level play critical roles in lubrication
performance, with longer chains and higher organic loadings resulting
in improved friction-reduction and antiwear properties. Under high-load
and long-duration conditions, the synthetic OMMT/ZDDP composite additive
exhibited excellent lubrication stability and antiwear capability,
significantly outperforming naturally derived organically modified
montmorillonite NOMMT/ZDDP oil. The enhanced performance was attributed
to the formation of a stable composite tribofilm, which combines the
load-bearing capacity of the inorganic layered structure with the
self-repairing capability of the tribochemical reaction film. Modified
synthetic montmorillonite provides a uniform interlayer structure
for the development of a stable, synergistic lubricating protective
film.
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产品关联
DOI
PubMed
高影响因子
TRIBOLOGY LETTERS
·
2003
·Vol. 15
·期 4
·385-394
·
IF 1.008
Yamaguchi E.S.,Zhang Z.,Kasrai M.,Bancroft G.M.
The antiwear properties of zinc dialkyldithiophosphate (ZDDP), dispersants, and mixtures of ZDDP and different dispersants have been evaluated using a pin-on-flat Plint wear machine. Tribochemical interactions between ZDDP and dispersants have been investigated under boundary lubrication conditions by means of X-ray absorption near edge structure (XANES) spectroscopy, probing the phosphorus, sulfur and nitrogen absorption edges. The results show that the dispersants do not give any wear protection by themselves in the base oil. The dispersants also do not affect the antiwear property of ZDDP under the given testing conditions. The N K-edge XANES analysis indicates that dispersants contribute to the chemical composition of the tribofilms and form mixed ammonium/zinc polyphosphates. Phosphorus in the tribofilms is present mainly in the form of medium-chain polyphosphate on the surface and short-chain polyphosphate in the bulk. Sulfur appears in the tribofilms mainly as sulfide S -II , possibly zinc sulfide. The presence of dispersants in oil blends does not disturb the polyphosphate (and sulfide) formation, but it does decrease the chain length of the polyphosphate in the tribofilms.
研究领域:
摩擦学
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润滑油化学
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材料科学
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表面分析
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Shuoshuo Chen,Shuguang Fan,Ningning Song,Guangbin Yang,Laigui Yu,Yujuan Zhang,Shengmao Zhang
Metal oxide nanoparticles as lubricant additives have attracted much attention, thanks to their excellent anti-wear ability and load-carrying capacity. Unfortunately, organic molybdenum, a small molecule auxiliary of zinc dialkyldithiophosphate (ZDDP) with high reactivity, exhibits poor load-bearing capacity. Therefore, molybdenum oxide nanoparticle (denoted as MONP) was surface-capped by dodecylamine (DDA) and maleic anhydride dodecyl ester (MADE) to obtain DDA/MADE-MONP, an organic-inorganic nanohybrid as a potential replacement of sulfur- and phosphorus-free commercial organic molybdenum additive (Organic-Mo). The as-prepared DDA/MADE-MONP nanohybrid was characterized by X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy; and its effect on the load-bearing capacity of an alkylated naphthalene base oil (AN30), as used alone and combined with ZDDP, was investigated. Results show that, whether used alone or combined with ZDDP, the as-prepared DDA/MADE-MONP has better load-bearing capacity than the commercial organic molybdenum additive. The reason lies in that DDA/MADE-MONP can release MoO 3 nanocores during the friction process to fill up the pits on the worn steel surface and form a dense protective tribofilm.
研究领域:
材料科学
·
润滑工程
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Huang Shaozhen,Wu Zhibin,Johannessen Bernt,Long Kecheng,Qing Piao,He Pan,Ji Xiaobo,Wei Weifeng,Chen Yuejiao,Chen Libao
A practical high-specific-energy Li metal battery requires thin (≤20 μm) and free-standing Li metal anodes, but the low melting point and strong diffusion creep of lithium metal impede their scalable processing towards thin-thickness and free-standing architecture. In this paper, thin (5 to 50 μm) and free-standing lithium strips were achieved by mechanical rolling, which is determined by the in situ tribochemical reaction between lithium and zinc dialkyldithiophosphate (ZDDP). A friction-induced organic/inorganic hybrid interface (~450 nm) was formed on Li with an ultra-high hardness (0.84 GPa) and Young’s modulus (25.90 GPa), which not only enables the scalable process mechanics of thin lithium strips but also facilitates dendrite-free lithium metal anodes by inhibiting dendrite growth. The rolled lithium anode exhibits a prolonged cycle lifespan and high-rate cycle stability (in excess of more than 1700 cycles even at 18.0 mA cm −2 and 1.5 mA cm −2 at 25 °C). Meanwhile, the LiFePO 4 (with single-sided load 10 mg/cm 2 ) ||Li@ZDDP full cell can last over 350 cycles with a high-capacity retention of 82% after the formation cycles at 5 C (1 C = 170 mA/g) and 25 °C. This work provides a scalable approach concerning tribology design for producing practical thin free-standing lithium metal anodes.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
PubMed
高影响因子
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