Materials
·
2025
·Vol. 18
·期 9
·2052
·
IF 3.2
Jiamin Yu,Junhao Wu,Chengcheng Jiao,Huanyi Chen,Xinxin Ruan,Wei Li,Genxiang Gong,Jinhong Yu,Kazuhito Nishimura,Nan Jiang,Tao Cai,Zhisheng Wu
As an emerging two-dimensional nanomaterial, diamond nanosheets have the advantages of high hardness and chemical stability; exhibiting good tribological properties when used as lubricant additives. However, the dispersion stability of nanomaterials as additives in lubricants remains a significant challenge. In this study, fluidized and functionalized diamond nanofluids were prepared by grafting polyether amine on the surface of diamond nanosheets. By changing the state of diamond nanosheets, this material not only improved its own lubrication property, but also improved its dispersion in the lubricant. The friction test results demonstrated that the friction coefficient was reduced by 66.9% and the wear rate was reduced by 81.8% with the addition of 3 wt% of diamond nanofluid in water–glycol solution. This enhancement of lubricating properties is related to the excellent film-forming properties of diamond nanofluids during the tribology. Thisindicatesthat fluidized 2D diamond nanosheets have excellent lubricating properties and can significantly improve the friction properties of lubricants as additives.
研究领域:
材料科学
·
润滑工程
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产品关联
DOI
PubMed
高影响因子
Journal of Nanomaterials
·
2022
·
IF 3.791
Zhenming Qi,Wenhui Yu,Jialong Tian,Kuang Wang,Jiayi Chen,Dawei Gao,Yu Ren,Chunxia Wang
Amino functionalized nanocarbon black (CB/KH550) was prepared in reaction between KH550 and nanocarbon black (CB). 2-(4-(4,6-dichloro-1,3,5-triazin-2-ylamino)phenylsulfonyl)ethyl) sodium sulfate (SDTES) was synthesized and characterized. Self-dispersive and reactive nanocarbon black (CB/KH550/SDTES) was prepared by nucleophile substitution reaction and characterized by FTIR, TEM, zeta potential, and TG analysis. Cotton fabric was dyed with CB/KH550/SDTES by dip-dyeing method and was observed by SEM. Moreover, color depth, static resistance, UV protection, tensile property, and rub fastness of cotton fabric were measured and analyzed. Results showed that CB/KH550/SDTES demonstrated excellent dispersion stability. The dyed cotton fabric possessed adorable antiultraviolet and antistatic properties. The preparation mechanism of the cotton fabric dyed with CB/KH550/SDTES was proposed.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Lu Guangjie,Yu Caili,Cheng Jie,Xu Jianben,Zhang Faai
Fluorescent polyurethane has been widely used as fluorescent probes and switches due to its diverse structure and properties, but most of them are solvent-based and synthesized from petroleum-based products. A new type of rosin-based anthraquinone fluorescent waterborne polyurethane (WPU-DAAQ) with good and stable fluorescence properties was synthesized by reacting rosin modified ester (RAG) as a diol and 2, 6-diaminoanthraquinone (DAAQ) as a fluorescent agent with diisocyanate. The structure of WPU-DAAQ was characterized by Fourier transform infrared spectroscopy, UV-vis absorption spectroscopy, and hydrogen magnetic resonance spectroscopy. The fluorescence properties, water resistance, and solvent resistance of WPU-DAAQ were tested. The results showed that DAAQ was successfully grafted onto the polyurethane molecular chain. The fluorescence intensity of WPU-DAAQ increases and then decreases with increasing excitation wavelengths, and increases with the increase of solvent ether content, and is significantly enhanced compared to DAAQ. The dispersion stability was good with the increase of DAAQ. The introduction of DAAQ into polyurethane improved the thermal stability, hydrophobicity, and solvent resistance of WPU-DAAQ. Therefore, WPU-DAAQ is a new type of fluorescent waterborne polyurethane with stable dispersion properties, good fluorescent properties, heat resistance and water resistance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Friction
·
2020
·Vol. 9
·期 3
·524-537
·
IF 5.29
Liu Hailong,Huang Yajing,Wang Yaozhu,Zhao Xiaomin,Chen Danqing,Chen Guohua
Anthracite sheets were coated by sorbitol fatty acid ester (span80) through ball-milling process. The tribological properties of the span80-coated anthracite sheets as the additive in polyalpha olefin were evaluated through a series of friction tests using a four ball machine. The results revealed that the span80-coated anthracite sheets exhibited excellent dispersion stability in base oil. In addition, compared with base oil, the average coefficient of friction, wear scar diameter, and wear volume of modified oil at a mass fraction of 0.03% span80-coated anthracite sheets decreased by 45.39%, 60.13%, and 95.95%, respectively. The oil containing span80-coated anthracite sheets achieved good friction-reducing and anti-wear effects over a wide range of applied loads, temperatures, or rotating speeds. Control experiments were performed as well. The results obtained using span80-coated anthracite sheets were superior to those obtained using pure anthracite. The lubrication mechanism was attributed to the synergistic action of the crystalline and amorphous carbon in anthracite sheets as they formed a protective film and played a mitigative role on the surface of friction pair, which mitigated the wear extent of the friction pair.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
COLORATION TECHNOLOGY
·
2019
·Vol. 136
·期 1
·15-22
·
IF 1.241
Lili Wang,Xiaying Jiang,Chenglong Wang,Yi Huang,Yiding Meng,Jianzhong Shao
To improve the properties of titanium dioxide particles and realise their firm anchorage in blue light curing film, three modified titanium dioxide particles were prepared by grafting 3-(trimethoxysilyl)propyl methacrylate, 3-aminopropyltriethoxysilane and hexadecyltrimethoxysilane. The surface changes of titanium dioxide particles after modification were characterised. The dispersion stability, photo-polymerisation, rheological and mechanical properties of modified titanium dioxide blue light curing inks were investigated. Results showed that compared with native titanium dioxide, modified titanium dioxide particles were more appropriate for blue light curing ink. The particle sizes of the three modified titanium dioxide particles became smaller, their surfaces exhibited hydrophobicity, and the viscosity of the modified titanium dioxide inks decreased slightly. Of the three modified titanium dioxide particles, 3-(trimethoxysilyl)propyl methacrylate- and hexadecyltrimethoxysilane-modified titanium dioxide particles exhibited better dispersion stability in blue light curing ink. In particular, 3-(trimethoxysilyl)propyl methacrylate-modified titanium dioxide blue light curing ink showed the best photo-polymerisation and mechanical properties, which indicated the participation of the pigment grafted by double bonds in the blue light curable polymerisation. Using modified titanium dioxide in blue light curing ink, the dry/wet rubbing fastness of the printed fabrics improved.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2019
·Vol. 8
·期 4
·695-707
·
IF 3
Jiang Feng,Sun Haoyang,Chen Lei,Lei Fan,Sun Dazhi
Inorganic nanomaterials exhibit superior friction-reduction and anti-wear properties in oils. In this study, 2D layered α-zirconium phosphate (α-ZrP) nanosheets intercalated with different amines have been synthesized to study their dispersion stabilities in lubricating oil and tribological applications. The intercalated amines should be sufficiently long and lipophilic to provide stabilization to α-ZrP nanosheets in mineral oil. The results of tribological tests illustrate that with the addition of well-dispersed nanosheets, the coefficient of friction (COF) and pin volume loss reduce by ~47% and 75%, respectively. The excellent dispersion stability enables the nanosheets to flow into the contact area at the beginning, and thereby protect the rubbing surface. A reduction in the van der Waals forces between the adjacent layers induced by the intercalated amines transforms the friction between adjacent layers from pin disk to sliding, leading to a decrease in the COF under hydrodynamic lubrication. The study provides a new method to enhance the tribological properties via tuning the dispersion stabilities of nanomaterials in oils.
研究领域:
材料科学
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摩擦学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Qiang Tang,Qing-Yun Wu,Lin Gu
Graphene oxide (GO) nanocomposite lubricants have been verified with excellent anti−wear and anti−friction properties. However, the rapid transfer of hydrophilic GO nanosheets into hydrophobic lubricants still faces great challenges. In this work, a series of nanocomposite lubricants were successfully fabricated by a simple phase transfer process without complex chemical modification. With the assistance of ethanol and oleylamine, the GO nanosheets initially dispersed in the water phase could be quickly transferred to the mineral oil within 20 s after hand-shaking the immiscible two−phase system. Moreover, the phase−transferred GO nanosheets were greatly stable in the mineral oil for at least seven days. The tribological properties of the GO nanocomposite lubricants had been studied by a macroscopic ball−on−disk friction test. The tribological behavior of the obtained nanocomposite lubricants showed that when 0.1 mg/mL GO was dispersed into mineral oil, the minimum average friction coefficient was 0.140, which was 72% lower than that of mineral oil. The universality of the phase transfer process was verified by the reduced GO nanosheets. This physical phase transfer method must be simple, effective, and environment−friendly to prepare nanocomposite lubricants.
研究领域:
材料科学
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化学工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shang-Yuan Cheng,Chen-Peng Zhang,Meng-na Chao,Shu-Wei Guo,Gui-Sheng Qi
Suspended nanodroplets affect the transfer process within fluids through micro-perturbation or micro-convection effects. Therefore, adding dispersed nanodroplets as the dispersed phase into the liquid phase to form nanoemulsions can enhance the CO 2 absorption process. The quality of nanoemulsions mainly depends on the emulsification equipment. Traditional physical mechanical effects can only achieve large-scale macroscopic mixing, which usually takes a long time to complete, resulting in issues such as low production efficiency, batch operation, and long preparation cycles. This paper uses an impinging stream-rotating packed bed as a reactor, with span60 and tween60 as surfactants, and adopts a high-gravity process intensification technology to prepare undecane/methanol nanoemulsions with good dispersion stability. Nanoemulsion absorbents for CO 2 capture applications have been developed. The effects of different operating conditions on the dispersion stability of nanoemulsion were investigated. Furthermore, CO 2 absorption performance of nanoemulsion absorbents and methanol were investigated in a bubbling reactor. Based on the results, the reasonable mechanism for the enhancement of mass transfer was also discussed in detail. Further experiments on CO 2 absorption using nanofluids were conducted and compared with pure methanol. The results indicate that when the undecane volume fraction is 0.01 %, the high-gravity factor is 27, the impinging velocity is 14.1 m·s −1 , and the circulation time is 20 min, the nanoemulsion exhibits the highest stability, with the narrowest particle size distribution of oil droplets, an average particle size of 20.5 nm, and the highest uniformity. Simultaneously, the change in turbidity over time is minimal. The corresponding thermal conductivity at 25°C is 0.2003 W/m·K. The addition of nano-oil droplets significantly accelerates the CO 2 absorption rate, allowing the absorbent to reach saturation earlier, while the total amount of CO 2 absorbed remains the same. Compared with pure methanol, the nanoemulsion enhances the CO 2 absorption rate by 4.48 %. This work may provide a promising green method for efficient production of nanoemulsions for carbon dioxide capture.
研究领域:
化学工程
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环境科学
·
能源技术
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yongxin Hu,Xiaoyu Mao,Changhua Li,Songlin He,Chuan Fu,Yi He
The enhancement of dispersion stability and interfacial compatibility of nanomaterials within aqueous epoxy matrices represents a pivotal strategy for augmenting the protective performance and corrosion resistance of coatings. In this study, Ti3C2Tx Mxene functionalized with sodium alginate (TSA) was obtained by introducing sodium alginate (SA) into Ti3C2Tx Mxene (T) to improve the corrosion resistance of aqueous epoxy coatings (EP). The dispersion stability of TSA in aqueous medium was quantitatively assessed via ζ-potential measurements, revealing a significant enhancement in stability compared to the reference material T. The long-term stability of TSA/EP composite coatings was systematically evaluated via electrochemical impedance spectroscopy (EIS). Notably, the charge transfer resistance (Rc) remained at 5 × 107 Ω·cm2 after a 60-day accelerated aging test, exhibiting exceptional electrochemical durability. Compared with pure EP coating, this value is improved by 2 orders of magnitude. The improvement is attributed to the fact that active −COOH and −OH groups on the surface of SA enhance the interactions between T nanosheets and EP matrix. Specifically, these functional groups form hydrogen bonds or chemical bonds at the interface. Such interfacial bonding mechanisms enhance the compatibility and interfacial adhesion between T and the EP matrix. These conclusions are further supported by manual scratching experiments. The accessibility and greenness of SA provide a simple and environmentally friendly way of thinking for modifying T.
研究领域:
材料科学
·
防腐蚀工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2024
·Vol. 76
·期 4
·486-499
·
IF 1.5
Ziyan Lu,Feng Qiu,Hui Song,Xianguo Hu
PurposeThis paper aims to solve the problems molybdenum disulfide (MoS2) nanosheets suffer from inadequate dispersion stability and form a weak lubricating film on the friction surface, which severely limits their application as lubricant additives.Design/methodology/approachMoS2/C60nanocomposites were prepared by synthesizing molybdenum disulfide (MoS2) nanosheets on the surface of hydrochloric acid-activated fullerenes (C60) by in situ hydrothermal method. The composition, structure and morphology of MoS2/C60nanocomposites were characterized. Through the high-frequency reciprocating tribology test, its potential as a lubricant additive was evaluated.FindingsMoS2/C60nanocomposites that were prepared showed good dispersion in dioctyl sebacate (DOS). When 0.5 Wt.% MoS2/C60was added, the friction reduction performance and wear resistance improved by 54.5% and 62.7%, respectively.Originality/valueMoS2/C60composite nanoparticles were prepared byin-situformation of MoS2nanosheets on the surface of C60activated by HCl through hydrothermal method and were used as potential lubricating oil additives.Peer reviewThe peer review history for this article is available at:https://publons.com/publon/10.1108/ILT-10-2023-0321/
研究领域:
材料科学
·
摩擦学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Zan Yu,Meng Zhou,Rende Liu,Xinya Zhang
Although incorporating modified graphene oxide (GO) into base oil can significantly boost the lubrication properties, existing modification strategies inevitably introduce halogen ions that are harmful to the metal at the friction interface. In this work, long-alkyl chains are grafted onto the surface of GO through electrostatic interactions between GO and cetyltrimethylammonium hydroxide (CTAOH), improving the dispersion stability of GO in base oil. Subsequently, polyisobutylsuccinimide (PIBSI, T154) further is utilized to enhance the interfacial adhesion between CTAOH-GO and the tribological interface. The combination of surface modification of CTAOH and PIBSI dispersion greatly reduces the van der Waals forces between the CTAOH-GO nanosheets, resulting in the CTAOH-GO/T154 additive can be stably dispersed in 500 N base oil for more than 200 days. When the addition amount of GO is 0.075 wt% and the ratio of CTAOH-GO to T154 is 1:5, CTAOH-GO/T154 additive realizes the reduction of the average friction coefficient and the average wear scar diameter by 46.3 % and 30.6 % at 392 N, compared with pure 500 N base oil. Mechanism analysis exhibits that the excellent dispersion of CTAOH-GO/T154 and quick formation of tribo-film facilitate enhanced lubrication performance. Therefore, this work proposes an effective strategy to fabricate the GO-based additive for lubricating oil.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Wei Xie,Xiaoke Li,Jiaying Zhou,Fei Yin,Yaogang Jiang,Liu Yang
In this study, a novel approach for the synthesis of eco-friendly and cost-effective composite nanomaterials PPy@HNTs was introduced. The proposed synthesis method offers environmental friendliness, simplicity, and cost-effectiveness. The resulting PPy@HNTs nanofluids , obtained through dispersion in a specially formulated base solution, demonstrate excellent dispersion stability , desirable thermophysical properties , and remarkable photothermal conversion performance. At a concentration of 800 ppm, the PPy@HNTs nanofluids exhibited an impressive efficiency of 79.2 %, surpassing the performance of conventional heat transfer fluids (HTFs). This research presents a promising avenue for the utilization of low-cost nanofluids in the field of photothermal applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）