Lubricants
·
2026
·Vol. 14
·期 6
·222
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IF 3.6
Haiyang Wang,Zhongyi He,Zongbin Wang,Haodi Zhang,Liping Xiong,Xiaogang Jiang
This study investigates spherical methyl silicone resin, a potentially environmentally friendly additive free of sulfur, phosphorus, and chlorine, as a lubricant additive in polyethylene glycol 200 (PEG 200) base oils. We evaluated concentration-response characteristics and tribological performance across PEG base oils containing 0.01–0.05 wt% resin. Tribological testing was conducted with a four-ball wear tester at 98 N and 1450 rpm for 30 min. All tested concentrations demonstrated excellent friction-reduction and anti-wear performance, with an optimal efficacy observed at 0.02 wt%. Surface characterization was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. This friction-reducing and anti-wear performance is attributed to the formation of silicon-oxygen species and graphene-like carbon structures, thereby effectively suppressing direct surface contact and mitigating wear. Consequently, spherical methyl silicone resin demonstrates considerable potential as a green lubricant additive for bearing steel applications.
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MOLECULES
·
2026
·Vol. 31
·期 17
·3001
·
IF 5.1
Wentao Li,Ying Liu,Xingchao Wang,Xiaohan Jiang,Lingyang Liu
Aqueous zinc-ion hybrid capacitors (ZIHCs) have attracted considerable attention for safe and sustainable energy storage; however, their practical application under variable temperature conditions remains challenging due to electrolyte freezing at low temperatures, accelerated water-related side reactions at elevated temperatures, and the instability of zinc electrode reactions. Herein, a diethylene glycol (DG)-based aqueous electrolyte was developed to improve the wide-temperature electrochemical performance of ZIHCs. The effects of different DG concentrations on electrolyte properties, molecular interactions, and electrochemical behavior were systematically investigated. The incorporation of an appropriate amount of DG regulates the hydrogen bond interactions among water molecules, thereby reducing water-related side reactions and improving zinc reversibility. Among the investigated electrolytes, the optimized DW80 electrolyte achieves balanced performance in terms of safety, low-temperature tolerance, and electrochemical stability. Benefiting from the optimized electrolyte composition, Zn||Zn symmetric cells exhibit stable long-term cycling performance, and the assembled ZIHCs demonstrate reliable operation over a wide temperature range from −40 to 60 °C. This work highlights the importance of optimizing cosolvent content and provides a simple strategy for improving the temperature adaptability of aqueous zinc-based energy storage systems.
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RSC Advances
·
2023
·Vol. 13
·期 13
·8901-8914
·
IF 3.9
Xinkuai He,Zhousi Hu,Qingtian Zou,Jingjing Yang,Ruqing Guo,Luye Wu
The preparation of active, stable and low-cost non-noble electrocatalysts for the hydrogen evolution reaction (HER) using the electrochemical water splitting process is crucial for the promotion of sustainable energy. In this study, Co–Ni alloys with various Co contents are prepared using a galvanostatic method and the co-deposition behavior of Co2+ and Ni2+ in ethylene glycol (EG) is reported. These results indicate that the presence of additional Ni2+ species can accelerate the Co–Ni co-deposition process and Co2+ species in the system can inhibit the reduction of Ni2+. Moreover, the two effects are improved with an increase in Ni2+ or Co2+ species concentration in the EG system, respectively. Chronoamperometry records show that the Co–Ni electro-crystallization mechanism is one of 3D instantaneous nucleation and growth. Moreover, the Co–Ni alloy with 59.46 wt% Co exhibits high electrocatalytic activity for HER with an overpotential of 133 mV at 10 mA cm−2 in 1 M KOH due to a high value of electrochemical active surface area (ECSA) (955.0 cm2). Therefore, the Co–Ni alloy electrocatalyst obtained from the EG system could be a promising candidate for practical hydrogen production.
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FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Mengting Gao,Zelin Li,Baozheng Zhao,Shitao Yu,Lang Huang,Qiong Wu
Nickel‑tungsten co-doped spherical carbon-based catalysts (m%Ni-n%W-GC T ) are prepared by one-pot hydrothermal‑carbonization using glucose as carbon host. Structural composition of tungsten transforms from WOx → W → WCx when increasing carbonization temperature and tungsten loading content at the presence of Ni during hydrogen reduction , attributed to the occurrence of carburizing reaction. The carbon-based catalysts exhibit developed porous structures with weak and moderately strong acidity, and the Brønsted acid and total acid contents increase with promoting tungsten loading content. Investigation of m%Ni-n%W-GC T activity on catalyzing cellulose hydrogenolysis shows that the porous structure provides abundant reaction sites and facilitates reactant transportation, where the Brønsted acid sites promote hydrolyzing cellulose, and WC x is beneficial for hydrogenolysis of glucose other than direct hydrogenation and then Retro-Aldol condensation for ethylene glycol (EG). The optimized reaction condition (2 h at 230 °C and 5 MPa with 9%Ni-13.5%W-GC 850 as the catalyst) delivers a cellulose conversion of 100%, with 69.2% selectivity for EG. The study provides an effective method for preparing EG from cellulose employing biomass-based carbon as the catalyst support.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Luping Chen,Shixiang Liu,Fengyuan Gao,Hailin Cong,Bing Yu,Youqing Shen
Transcatheter arterial chemoembolization (TACE) is one of the common methods of treating tumors and usually requires an accompanying injection of an exogenous contrast agent, but the exogenous contrast agent is highly susceptible to removal by blood flow , which greatly reduces the efficiency of the operation. Here, we developed a uniformly sized Ag 2 S/BaSO 4 /DOX@PEGDAMS that integrates embolization, drug loading, and visualization with a microfluidic device . The microspheres can be imaged stably under NIR-II/X-ray for a long time, and the luminescence of NIR-II is better than that of X-ray. This breaks the limitations of conventional X-ray-only imaging of embolic microspheres . The microscope images and scanning electron microscope EDS results showed that the microspheres were regularly spherical with uniform particle size, and the signature elements such as Ag, S, and Ba were uniformly distributed in the microspheres. In vitro cytotoxicity assays and apoptosis assays have demonstrated that the microspheres have good biocompatibility and can effectively inhibit tumor cell growth due to the presence of DOX. The ability of microspheres to aggregate in blood vessels and block blood flow was verified by modeling and embolizing in rabbit ear tumors. In conclusion, Ag 2 S/BaSO 4 /DOX@PEGDAMS shows excellent embolization, drug loading, and imaging capabilities, and has the potential to be used for TACE and other diseases requiring interventional embolization therapy.
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Surfaces and Interfaces
·
2023
·
IF 6.2
Yuhan Lin,Jiahong Chen,Junli Zhu,Jiawei Zhong,Kun Yang,Honghao Deng,Junqiao Huang,Zhichuan Shen,Zhicong Shi
Replacing the liquid electrolytes with polymer electrolytes is an irresistible trend to meet the application requirement of lithium metal batteries . However, for obtaining a better cycling performance, traditional polymer electrolytes typically need to be operated at high temperature, which limits the commercialization of next-generation lithium metal batteries. Here, a flexible gel polymer electrolyte (TGD-TCGG-PAN) is constructed in polyacrylonitrile (PAN) porous spinning membrane via the in-situ free radical polymerization . At 30 °C, the lithium-ion conductivity and lithium-ion transference number of TGD-TCGG-PAN are 1.57 × 10 −4 S cm −1 and 0.72, respectively. The LFP|TGD-TCGG-PAN|Li battery can cycle at 3C for more than 700 cycles with a capacity retention rate of 95.02%. Compared with commercial PE membrane, application of PAN makes the TGD-TCGG-PAN perform a better thermal stability. This new process is a viable way for lithium metal batteries using gel polymer electrolyte.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Daqian Si,Zhihao Zhang,Zhiqiang Wang,Yinci Chen,Xu Gao,Bo Da,Hongxuan Guo,Litao Sun
Hydrogels, especially poly(ethylene glycol)-based hydrogels, have received considerable attention due to their excellent performance. However, the commonly used millimeter or micron size of hydrogels limits their higher resolution sensing applications. Using liquid-phase, focused electron-beam-induced deposition is a feasible way to print nanostructured hydrogels. In this work, a device based on a scanning electron microscope was designed to fabricate nanopatterned hydrogels and the electron scattering distribution to induce hydrogel cross-linking was obtained by an optimized Monte Carlo simulation with a Pearson correlation coefficient analysis. We discuss the factors affecting the swelling ratio of the poly(ethylene glycol)diacrylate hydrogel and conclude that the feature size of the hydrogel is about 280 nm in diameter under certain conditions. This study provides a solution for the miniaturized preparation of nanohydrogels, which will help improve the ability of nanosensors to obtain more high density of arrays.
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THERMOCHIMICA ACTA
·
2022
·
IF 3.378
Lili Feng,Runxiang Yu,Yang Li,Yushen Huang,Lei Zhao
Aiming at the problems of easy leakage and low thermal conductivity of solid–liquid phase change materials (PCM), and the recycle of fly ash, ordered mesoporous silica (OMS) was synthesized from fly ash to prepare the shape–stabilized PCM (SSPCM) with various polyethylene glycol (PEG) mass fractions. Aminoated multi–walled carbon nanotubes (MWNT–NH 2 ) were added into SSPCM for enhancing the heat transfer rate. The structure of PEG remains intact after blending with OMS. The shape–stabilization capacity of OMS to PEG was up to 90 wt%. The leakage problem of solid–liquid PCM can be effectively solved owing to the interactions between OMS and PEG, such as surface adsorption, mesoporous confinement and hydrogen bonding. The melting enthalpy of PEG/OMS SSPCM with 90 wt% PEG reaches up to 133.7 J g −1 , and its heat storage efficiency is 90%. SSPCM exhibits excellent thermal stability and reliability. Its thermal conductivity is increased by 191.3% upon the addition of 5 wt% MWNT–NH 2 comparing with PEG.
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ENERGY & FUELS
·
2023
·
IF 5.3
Qi Zhang,Xiao Wu,Yang Liu,Rui Sun,Fangfang He,Zhuoni Jiang,Yuan-Lin Zhou,Yongsheng Li,Wenbin Yang
The application of thermal energy storage (TES) technology in practical engineering has been limited by liquid leakage and material rigidity during phase change. In this study, we prepared novel polyethylene glycol (PEG)/polyurethane acrylate (PUA)-based flexible phase-change films (PCFs) using ultraviolet (UV) curing technology to solve these problems. The PCFs showed a desirable phase-change enthalpy (113.1 J/g), low leakage rate (1.70%), reversible optical performance, excellent shape stability, and superior flexibility. The tensile strength of the PCF was 5.00 MPa, and the elongation at break reached 1342.3%, which was five times higher than that of pure PUA, indicating outstanding flexibility and toughness. The as-prepared PCFs show great potential for future applications, such as incorporation into flexible electronic devices and temperature control systems.
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FUEL
·
2023
·
IF 7.4
Xiaoli Yang,Zelin Li,Mingyu Guo,Tao Zhao,Xiong Su,Wei Jiang,Guangting Han,Haoxi Ben
One-pot catalytic conversion of cellulose to ethylene glycol (EG) provides an efficient way toward the production of high value-added chemicals from the abundant biomass resource. However, control of product selectivity is a challenge due to the thermal instabilities of cellulose derived sugars. Here, a series of multifunctional NiCu/WO 3 catalysts were prepared and applied to this process. By tuning the metal ratio and WO 3 content, a high EG selectivity of 58.9% was obtained. The selectivity of total diols even reached 83.9%. Besides, the catalyst revealed excellent performance in the conversion of raw biomass. Characterization results showed that the special catalyst structure of WO 3 -wrapped metal particles enabled the reaction to proceed in a well-defined sequence and also facilitated the formation of NiCu-WO x-1 -O(H) interfacial sites. These interfacial sites offered high activity for the C C bond cleavage to produce glycolaldehyde from glucose. An appropriate amount of each active site ensured a well-synergistic effect of C C cleavage and hydrogenation capabilities, thus resulting in the highly selective formation of EG.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2022
·
IF 3.682
Yongli Shi,Chunyan Li,Mingbo Yang,Xiaofei Pan,Jie Hu
In this study, novel redox-sensitive nanoparticles (NPs) were fabricated from the poly(caprolactone) conjugates with disulfide-linked poly(ethylene glycol) (DDMAT- mPEG-S-S-PCL, DPSP). The DPSP polymer was synthesized by ring-opening polymerization (ROP) and reversible addition-fragmentation chain transfer (RAFT) polymerization. The obtaining of the DPSP polymer was confirmed by the 1H nuclear magnetic resonance (1H NMR) and Fourier transform infrared spectroscopy (FTIR) spectra. The DPSP NPs were fabricated with the solvent-evaporation method. Docetaxel (DTX) was employed as a model drug and encapsulated into the DPSP NPs. The in vitro anti-tumor activity of the DTX-loaded DPSP NPs and free DTX against the breast cancer cells (4T1) were evaluated by MTT assay. The cargo-free DPSP NPs were in circular shapes with an average diameter of 107.8 ± 0.4 nm. These NPs displayed redox-responsive behavior in the presence of glutathione. Animal experiments indicated that the DPSP NPs showed excellent blood compatibility and good bio-security. Cell tests suggested that the DPSP NPs could be taken in by 4T1 cells, smoothly, which improved the anti-tumor activity of free DTX.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chaowu Wang,Qibo Zhang
Efficiently recovering critical metals from secondary resources is crucial to decreasing the environmental impact of mineral-resource mining and reducing production costs and process energy consumption. Herein, we propose a simple and comprehensive approach to recycle Co 3 O 4 from waste choline chloride/ethylene glycol (named Ethaline) electrolyte containing Co(II) ions along with solvent regeneration. Through the rational coordination adjustment using water, [CoCl 4 ] 2− complex in the Ethaline-based electrolyte is transformed to [CoCl 2 (H 2 O) 4 ] 0 and [CoCl 2 (H 2 O) 5 ] + to facilitate precipitation separation. Adding oxalic acid (OA) as a precipitator can reach 97.1% cobalt recovery efficiency with a high value-added Co 3 O 4 rod-like structure obtained by calcining the oxalate precipitate. In addition, the water-containing solvent can be regenerated via reduced pressure distillation with a high recovery efficiency of up to 98.0%. FT-IR and 1 H NMR characterizations verify that the regenerated Ethaline exhibits good structural stability. Impressively, the proposed recovery path shows high recovery efficiencies for both cobalt and Ethaline in various practical Co(II) ion-containing electrolytes. This study establishes a novel technical pathway for the resource utilization of metal-bearing waste Ethaline electrolytes, which shows an excellent prospect in solvent recycling after metal processing.
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