INDUSTRIAL LUBRICATION AND TRIBOLOGY
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2024
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IF 1.5
Hui Zhao,Shunzhen Ren,Zhengbo Zhong,Zhipeng Li,Tianhui Ren
PurposeThis study aims to reveal the tribological mechanism of synergistic effect between MoDTC and P-containing additives in aluminum-based grease.Design/methodology/approachThe authors prepared a molybdenum dialkyl dithiocarbamate (MoDTC) and revealed the tribological mechanism of synergistic effect between MoDTC and P-containing additives in aluminum-based grease by combining with ZDDP and P-containing and S-free additives.FindingsThe MoDTC the authors prepared has good friction-reducing and anti-wear properties in aluminum-based grease and has an obvious synergistic effect with ZDDP. MoDTC and ZDDP have a significant synergistic effect on the tribological properties in aluminum-based grease, mainly because of the formation of phosphates and metaphosphates as well as more MoS2in the friction film. P element plays a facilitating role in the chemical conversion of MoDTC to MoS2.Originality/valueThe experiments of MoDTC with tributyl phosphate and trimethylphenyl phosphate confirm that the P element plays a facilitating role in the chemical conversion of MoDTC into MoS2.Peer reviewThe peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2023-0410
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
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 42
·19876-19882
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IF 3.591
Ling Zhao,Hanping Fu,Lishan Jian,Yating Zeng,Liran Liu,Qingshuang Liang,Xiufeng Xiao
In this work, we report a novel phosphorus element heterostructure with a snowflake-like morphology consisting of 1D rod-like black phosphorus (BP) and 2D flake-like red phosphorus (RP). The content of black phosphorus in the heterostructure can be adjusted and the light absorption range and photocatalytic performance of the heterostructure increase with the proportion of black phosphorus. In this 1D/2D phosphorus element heterostructure, the photogenerated electrons in the conduction band of BP can be used for water decomposition to produce hydrogen, while the photogenerated holes in the valence band of RP can be used to produce oxygen, without using any sacrificial agents. The ratio of hydrogen and oxygen evolution rates is 2 : 1, and the rates are 2.0 and 1.1 μmol g−1 h−1, respectively. Therefore, we believe that this work demonstrates the potential of metal-free elemental photocatalysts with high efficiency, especially in overall pure-water splitting.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Delai Jiao,Haofei Sima,Xiaolin Shi,Chunling Zhang,Bo Liu
In this work, a mussel-inspired flame retardant containing a catechol moiety, was synthesized, which was used to coat flexible polyurethane foam (FPUF). The influence of the coating time, coating temperature, and flame retardant concentration on the coating thickness and morphology were investigated. When the temperature is 45 °C, and the coating time is 3 days and the concentration is 3 mg/mL, the peak heat release rate (PHRR) of the coated FPUF decreases by 44.2 %, and the combustion time was significantly prolonged. This is because catechol contains a large number of hydroxyl groups, and the flame retardant coating formed after polymerization contains a large amount of carbon sources. Additionally, the phosphorus element in DPDHPP has a catalytic effect on carbon formation, which can form a phosphorus rich 3D network carbon layer in the condensed phase during combustion. Catechol and P-containing free radicals can produce quenching effects in the gas phase, reducing the active free radicals in the air. The flame retardant coating formed not only significantly improves the flame retardant performance of FPUF, but also has no adverse effect on the compression properties of the FPUF.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 48
·45556
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IF 1.86
Hongqiang Yan,Li Zhao,Zhengping Fang,Hao Wang
Complex multilayer coatings composed of α-zirconium phosphate (ZrP), polyethylenimine (PEI), and ammonium polyphosphate (APP) were constructed via layer-by-layer assembly method for flame retardant ramie fabric. Bicomponent PEI/ZrP layers served as insulating barrier coating, and bicomponent PEI/APP layers served as intumescent coating. The flame retardancy of the coated ramie fabric was strongly dependent on the nature of the coatings and the layer-by-layer assembly patterns. The coated ramie fabric with inside PEI/ZrP layers and outside PEI/APP layers possessed the most uniform and consistent coating surface morphology, as well as the highest content of N and P elements, resulting in an excellent improvement in flame retardancy of ramie fabrics. When this kind of coated ramie fabric was heated, the inner PEI/ZrP layer effectively prevent oxygen and heat from penetrating into the substrate, and the outer PEI/APP layer exposed to air with good expansion during combustion. The synergistic effect was formed during the combustion process and could impart ramie fabrics with high flame retardancy. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45556.
研究领域:
材料科学
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纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2024
·Vol. 39
·期 2
·433-438
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IF 3.1
Xinyan Yang,Xin Wang,Dongdong Li,Xu Zhang,Kuohu Li,Hongmei Ren,Zhengxian Zhou,Zhengbo Qin,Xianfeng Zheng
For analyzing the phosphorus (P) element in water, a liquid aerosol is used as a sampling method of laser-induced breakdown spectroscopy (LIBS). To further improve the detection performance of liquid aerosol-LIBS, the effect of liquid aerosol temperature on the qualitative and quantitative analysis was investigated. With increasing the liquid aerosol temperature, the emission intensity of P increased with the temperature; the threshold energy density (Eth) of P I 213.618 nm decreased from 9.98 to 6.62 J cm−2, and the optimal laser energy density reduced from 26.00 to 18.70 J cm−2. In addition, the LoD of P decreased from 5.22 to 1.81 ppm, and the average relative standard deviation (ARSD) of the intensity of P I 213.618 nm was similar. Furthermore, the R2, the average relative error (ARE), and the root mean square error of cross validation (RMSECV) were improved from 0.9926 to 0.9964, 8.93 to 5.95%, and 4.85 to 2.91 ppm. The results indicate that liquid aerosol temperature affects the sensitivity, LoD, and accuracy of liquid aerosol-LIBS for the analysis of P in water.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
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2018
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IF 0
Lei Wei,Shi-Xi Zhao,Xia Wu,Shu-Jin Zhao,Ce-Wen Nan
Nano-Li 2 Mn 0.5 Fe 0.5 SiO 4 /C cathode material is synthesized by a hydrothermal route and phosphorus substitution is applied to improve structural stability and electrochemical properties. At low substitution content, P element completely enters into the lattice, forms [PO 4 ] tetrahedrons and partially replaces [SiO 4 ] tetrahedrons , which is confirmed by X-ray diffraction and X-ray photoelectron spectroscope measurements. Phosphorus substitution helps to suppress the change of coordination number of Mn and stabilize the material structure to some extent, obtaining better electrochemical performance in the early cycle. With the increase of P content, parts of P element exist in Li 3 PO 4 which distributes uniformly and co-exists with active substance. Electrochemical tests prove that existing Li 3 PO 4 has positive impacts on cycle and rate performance, and the lithium ion diffusion coefficient increases by about 14 times than pristine sample. Under the synergistic effects of phosphate substation and proper Li 3 PO 4 , Li 2 Mn 0.5 Fe 0.5 SiO 4 /C shows enhanced electrochemical performances.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Tian He,Fangeng Chen,Wenxiang Zhu,Ning Yan
There is a strong interest in developing environmentally friendly synthesis approaches for making polyurethane elastomers (PUE) with desirable mechanical performance and flame retardancy suitable for a variety of applications. Hence, in this study, a novel nano functionalized lignin nanoparticle (Nano-FL) containing nitrogen (N) and phosphorus (P) moieties was developed via mild grafting reactions combined with the ultrasound method. The Nano-FL incorporated in the PUE acted as both crosslinking agents and flame retardants. The novel Nano-FL showed good compatibility and dispersibility in the PUE matrix, thereby overcoming the weakening effect of adding traditional lignin flame retardants on the mechanical properties of the PUE materials. PUE/Nano-FL exhibited strong tensile properties. Compared with control neat PUE, with 10 wt% of Nano-FL addition, the PUE attained a limiting oxygen index as high as 29.8% and it also passed the UL-94 V-0 rating. Furthermore, Cone Calorimetry Test (CCT) showed that the addition of Nano-FL not only reduced the heat release rate and the total heat release but also decreased the total smoke production rate during combustion. The char residues of PUEs with Nano-FL showed a high oxidation resistance with dense and continuous structural morphologies. The combined barrier and quenching effects of the char layer provided excellent flame retardancy performance. The novel Nano-FL developed in this study showed excellent promises as green functional additives for enhancing mechanical, thermal and flame retardancy performance of a wide range of polymers.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
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2024
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IF 8.6
Cui Li,Yu Long,Yuanmeng Lou,Xuan Huo,Lili Ma,Yanan Tang,Chuncheng Hao,Xin Wen
As one typically sustainable polymer material, poly(butylene succinate) (PBS) is highly necessary to improve its flame retardancy and simultaneously maintain satisfied mechanical performances. In this study, “three-in-one” novel flame retardant was synthesized through grafting organophosphorus onto Fe-MOF functionalized Mg(OH) 2 (labeled as MH@Fe-MOF-P), then it was introduced into PBS matrix to investigate its effect on flame retardancy and mechanical properties. The results indicated that PBS/20MH@Fe-MOF-P exhibited excellent flame retardancy, including that the LOI was 29.6%, the UL-94 rating reached to V0, and the peak of heat release rate (PHRR) decreased by 82.1%. The flame retardant mechanism was ascribed to the synergistic effect of Mg(OH) 2 , Fe-MOF and organophosphorus on delaying the decomposition and catalyzing the carbonization of PBS. Meanwhile, PBS/20MH@Fe-MOF-P presented better mechanical performances than PBS/20MH and PBS/20MH@Fe-MOF composites, resulting from the special structure of MH@Fe-MOF-P to achieve good dispersion of fillers and strong polymer-filler interface adhesion. This work provides a novel strategy to modify Mg(OH) 2 with high flame retardant efficiency, and also broadens the practical applications of PBS materials with balanced comprehensive performances.
研究领域:
材料科学
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高分子化学
✓ 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）