POLYMER SCIENCE SERIES B
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2024
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IF 1
Le Liu,Yang Wentong,Huang Xiaoling,Deng Qingsheng,Yu Deyu,Zhang Hongwen,Jiang Yan
Abstract In this study, VO x was prepared by oxalic acid and vanadium pentoxide under nitrogen atmosphere and SiO 2 was grown on the surface of VO x . Block copolymer (PCL- b -PDMS- b -PCL) was synthesized by hydroxy terminated poly(dimethylsiloxane) and caprolactone, and the composite material containing inorganic particles was obtained by blending VO x /SiO 2 with PCL- b -PDMS- b -PCL. The porous film was constructed by breathing pattern method, and the supersmooth surface was obtained by injecting lubricating oil into the porous film. The composite was tested by Fourier transform infrared spectroscopy, hydrogen NMR spectroscopy, scanning electron microscopy, contact angle and anti-bacterial adhesion. The results showed that PCL- b -PDMS- b -PCL was successfully synthesized, and the prepared composite material containing inorganic particles had excellent superslippery properties after oil injection, and the sliding angle was 2°.
研究领域:
材料科学
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表面工程
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化学合成
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DOI
高影响因子
Surface Topography-Metrology and Properties
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2022
·Vol. 10
·期 4
·045025
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IF 2.185
Ling Pan,Yuqing Han,Yunhui Chen,Liming Guo
Graphene exhibits great potential as an additive to enhance the anti-wear and friction reduction capacity of moving mechanical components in a synergistic mechanism with the base oil. This paper considers the effect of different factors such as the number of base oil molecules, graphene content, normal load, sliding velocity and the presence of graphene. The synergistic mechanism of graphene and base oil is investigated by experiments and molecular dynamics (MD) simulations. The results show that the friction and wear reduction is due to the formation of the load-supporting graphene layers and sufficient base oil molecules between Fe slabs. Graphene can stably adsorb on the rubbing surfaces lubricated by the base oil, confirming that graphene can form a physical deposition film on rubbing surfaces. Low friction and wear can be achieved with higher sliding velocity and lower load. Furthermore, compared to the sliding velocity, the load significantly affects the mean square displacement of base oil and oleic acid molecules. These outcomes provide a better understanding of the tribological properties of graphene as a lubricant additive.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Shijie Yu,Yuhao Chai,Chenyi Zhu,Kebing Zhu,Li Liu,Xiuli Zhang,Xiaocui Wang,Jun Cao
To improve the tribological performance and corrosion resistance of engine bearings exposed to contaminated lubricating oil , polymer coatings containing NdCl 3 at concentrations of 3.45 wt%, 5.17 wt%, and 6.89 wt% were developed, respectively. These coatings were applied to the surfaces of copper and aluminum alloys using a liquid spraying technique, aiming to assess their corrosion and wear resistance. Electrochemical experiments showed that the coating with a 3.45 wt% NdCl 3 concentration exhibited superior corrosion resistance , as evidenced by the highest self-corrosion potential and polarization resistance. Furthermore, friction tests on the corroded samples revealed that the 3.45 wt% NdCl 3 coating also demonstrated the lowest coefficients of friction and wear rates. This is due to the addition of an appropriate amount of NdCl 3 , which densifies the internal structure of the coating and improves the mechanical properties of the coating, thereby significantly improving its corrosion and wear resistance.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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DOI
高影响因子
Lubricants
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2023
·Vol. 11
·期 4
·156
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IF 3.5
Yuanyuan Li,Chen Chen,Qiong Tang,Lei Liu,Jinxiang Dong
Alkylnaphthalene as base oils are widely applied in the production of high-performance lubricating oils. Here, we report the synthesis of multi-butylnaphthalenes by alkylation of naphthalene andn-butene with trifluoromethanesulfonic acid as catalyst. Trifluoromethanesulfonic acid exhibited excellent catalytic performance with naphthalene conversion, as high as 98.5%, and the multi-butylnaphthalenes selectivity of 98.8% under optimum conditions. To investigate the effects of the side-chain numbers on naphthalene on the lubrication performance, two kinds of alkylnaphthalenes were obtained by controlling catalyst dosage, denoted as MBN-1 (90.3% mono/di-butylnaphthalenes) and MBN-2 (98.2% tri/tetra/penta/hexa-butylnaphthalenes), respectively. The primary physiochemical properties of the synthetic oils were tested, and their tribological performance was evaluated. MBN-2, with more side chains on naphthalene, displayed more effective friction reduction and anti-wear properties than MBN-1 and the commercial alkyl naphthalene base oil AN5.Keywords:naphthalene;trifluoromethanesulfonic acid;alkylation;synthetic lubricating base oil
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Materials
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2023
·Vol. 16
·期 14
·4979
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IF 3.4
Wen Zhong,Jiazhi Dong,Siqiang Chen,Zhe Tong
The synergistic effect of different types of solid particles in liquid lubricants is of great interest. In this work, g-C3N4nanosheets were initially prepared using a calcination method and then as-prepared, and h-BN were used as lubricating additives to the white oil. A comparison between the mixed additives and the single g-C3N4or h-BN additives revealed that the base oil with the addition of g-C3N4and h-BN showed the best lubricating properties. The results show a 12.3% reduction in friction coefficient, resulting in a 68.6% reduction in wear rate compared to the white oil when filled with 0.5 wt% g-C3N4and h-BN (1:1 by weight). Moreover, the addition of g-C3N4and h-BN improves the high-temperature lubrication properties of the white oil. However, the friction coefficient and wear rate increase with increasing oil temperature. The large contact area between g-C3N4and its sliding counterpart and the strong adhesive force between h-BN and its sliding counterpart improve the film formation efficiency, leading to enhanced tribological properties under oil lubrication conditions.
研究领域:
材料科学
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机械工程
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表面工程
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Shasha Yu,Jianxiang Feng,Tao Cai,Shenggao Liu
Normally, the sterically hindered phenols and diphenylamines, used as antioxidants, are added into the base oil simultaneously in order to improve the antioxidant efficiency. In view of this, we have designed a new type of antioxidant which combined the two traditional antioxidants into one molecule with Schiff base. These novel Schiff base bridged phenolic diphenylamine (SPD) antioxidants have been prepared through a one-step synthesis method which is suitable for large-scale production. The thermal stability and antioxidant ability were examined by thermal gravimetric analyzer (TGA) and pressurized differential scanning calorimetry (PDSC), respectively. The results showed that they both had better thermal stability and antioxidant efficiency than the commonly used commercial antioxidants. Importantly, the formulation of SPDs with other additives also exhibited improved antioxidant performances, presenting good application potential in the lubricant industry.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Ting Li,Yun Chen,Ziyu Han,Junhai Wang,Xinran Li,Lixiu Zhang,Yunwu Yu
Deep eutectic solvents (DESs) serve as functionalized solvents with superior lubricating properties. However, limited research has been conducted on their application for modifying and treating nanomaterials as nonpolar lubricant additives. Consequently, this paper presents the synthesis of a menthol/thymol/tetradecylphosphonic acid oil-soluble ternary DES, which was employed to modify and treat MXene. The DES facilitates the expansion of MXene’s interlayer spacing, while the grafting of long carbon chains in the DES enhances the dispersion stability of MXene in nonpolar lubricants. Furthermore, the tribological properties of DES complexed MXene lubricant additives were examined, revealing a reduction in the coefficient of friction and wear rate by 46.6 and 56.8% for both 0.1 wt % DES/MXene and 2 wt % DES base oil at 25 °C, and by 40.3 and 48.1% at 100 °C, respectively. The superior lubrication performance is attributed to optimal dispersion stability, exceptional wettability, and the synergistic impact of the dual lubrication film created by DES and the interlayer shear mechanism of MXene.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2020
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IF 5.278
Jun Ma,Shaojun Ruan,Jianqiang Hu,Yuanbao Sun,Yiwei Fei,Xufeng Jiang,Shibao Dong,Teng Chen,Nan Wu
Dose the blackened lubrication oil needs to be replaced for flying safety? Since there is very limited room for inaccurate assessment of oil quality due to strict flying safety standards, much aviation lubrication oil is disposed in advance long before their service life. More important, aircrafts still face the fatal challenges from unpredictable lubrication oil deterioration. Color change is surely a significant signal to diagnose the quality of lubrication oils. Based on the colorimeter, the color numbers of the testing lubrication oils are measured in this paper to identify the color variation degree of the oxidized lubrication oils. Then the molecular structures of the oxidized lubrication oils are investigated to find the intrinsic relationship between the oxidation products and color numbers. Based on key performances of the oxidized oil samples, the oil quality is undoubtfully deteriorated which is coincident with the variation of color number. The color numbers of the used aviation lubrication oils could provide an alternative way to readily and quickly measure the decline degree and residual lifetime.
研究领域:
化学工程
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航空航天工程
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DOI
高影响因子
Materials
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2020
·Vol. 13
·期 17
·3669
·
IF 3.057
Tong Zhang,Jianguo Zhao,Jin Zhang,Shanshan Zhang,Jingwei Li,Shijie Li,Xinyu Li,Jie Zhang
In this study, crumpled graphene balls (CGB), a kind of nano-material, was used as an additive to improve the tribological properties of base oil. Nano-magnesium silicate hydroxide (MSH)/CGB composites were prepared by ultrasound-assisted liquid-phase exfoliation. The loading of MSH significantly increased the number of pleats and reduced the lamellar thickness of CGB. Then, in order to improve the compatibility with the base oil, the MSH/CGB composites were decorated with oleic acid and stearic acid to get modified lipophilic composites (ML-MSH/CGB). The ML-MSH/CGB were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the tribological properties of the ML-MSH/CGB in base oils were investigated using a ball-on-disc setup tribometer. It indicated that the fantastic tribological behavior of the ML-MSH/CGB in base oil may contribute to a smaller and extremely wrinkled laminated structure. Furthermore, the base oil with 0.005 wt% ML-MSH/CGB composites exhibited the best anti-friction effect, and its average friction coefficient, wearing capacity and wear scar diameter were reduced by 25.4%, 22.1% and 16.7%, respectively. The introduction of ML-MSH/CGB composed materials is an excellent strategy to optimize the friction performance of lubricating oil.Keywords:crumpled graphene balls;magnesium silicate hydroxide;lubricating oil;tribological properties
研究领域:
材料科学
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机械工程
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2018
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IF 2.955
Chijia Wang,Huaiyuan Wang,Zhanjian Liu,Xixi Chen,Chongjiang Lv,Yue Hu,Yanji Zhu
Novel lypohydrophilic porous fillers that can function as micro-reservoirs to store lubricating oil as a low-friction and anticorrosive agent in a composite coating were developed. The novel oily particles were added to an epoxy resin (EP)-based coating to study the effect of lubricating oil on the anti-corrosion and the low-friction performance of the coating. The electrochemical impedance spectroscopy and the sliding wear tests demonstrated that the oily particles can significantly improve the barrier property and the wear-resisting performance of the EP coating. Furthermore, the friction coefficient of epoxy resin-25% lubricating celatom coating (0.4) was lower than that of the epoxy resin-25% PVDF coating (0.55), and the wear rate was lower by a factor of eight. The enhanced wear resistance can be mainly attributed to the lubrication performance of the lubricating oil stored in the porous particles. In addition, the hydroxyl group on the porous particles enhanced the crosslinking with the epoxy resin.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Bin Ge,Dong Liang,Yi Lei,Yajie Zhang,Yi Liu,Wei Wu,Yijun Shi,Jun Zhao
Lubricating oil as the “lifeblood” of industry can improve the performance and longevity of machines by orders of magnitude. However, the acidity of oils occurring during operation always results in fatal failures of machine elements. It is a great challenge to monitor oil acidity online in a highly sensitive machine system. In this study, a self-powered, real-time, online triboelectric sensor was developed for detecting oil acidity based on oil-solid triboelectricity (OA-TENG). By engineering a tribo-surface molecular structure with fluorocarbon chains and amino groups, the contact angle of the optimized triboelectric surface changed to ∼155°, which was much higher than that of commercial polytetrafluoroethylene (PTFE, ∼40°). Furthermore, the real-time adsorption of aged oils on the optimized surface was achieved using quartz crystal microgravimetry with dissipation (QCM-D) for oil-solid contact. It was found that the amino group on the surface has the capability of capturing oxygen-containing contaminants generated during aging through hydrogen and covalent bonds, which is able to adsorb with another 0.3 μg cm−1 compared with that without amino groups. Thus, typical acidity contaminants in aged oils can be successfully monitored. The triboelectric output of the optimized OA-TENG was similar to that of the PTFE-based OA-TENG, but the monitoring sensitivity of the optimized OA-TENG (∼0.62 V per TAN) was much higher than that of the PTFE-based OA-TENG (∼0.2 V per TAN). The triboelectric sensor's sensitivity reported in this study was also much better than that of the previous method for monitoring oil acidity (∼0.25 V per TAN). This work not only provides new pathways for oil condition monitoring with high sensitivity but also greatly expands the applicability of TENGs.
研究领域:
机械工程
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材料科学
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传感器技术
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DOI
高影响因子
Analytical Methods
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2021
·Vol. 14
·期 7
·694-699
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IF 2.896
Pengxiao Jia,Fu Wang,Wei Zeng,Zhaofeng Wang
Lubricating oils offers abundant information about the operating state of machines. In this work, a donor–acceptor aggregation-enhanced emission fluorescent molecule, (Z)-4-(1-cyano-2-(4-(diphenylamino)phenyl)vinyl)benzonitrile (CPA–TPA), was synthesized to investigate its function to sense the viscosity and polarity of lubricant base oils. The results indicated that the molecule showed steadily-increased fluorescence emission with the base oil viscosity. In a mixture of poly-α-olefin/ester base oils, its optimal emission gradually red-shifted with the ester oil fraction, i.e., the polarity of the lubricant. A good correlation could be established between the emission intensity of the probe and the oil viscosity or between the optimal emission wavelength and the oil polarity. This demonstrates a dual-response fluorescent probe used for lubricating oil analysis and opens a new opportunity to develop a molecule-based method for the evaluation of lubricating oil quality.
研究领域:
化学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）