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Wang H, Che Q, Li Y, Zhang S, Liu X, Zhang J, Hu L. Ionic Nitrogen-Doped Carbon Dots as Nonpolar Lubricant Additives at Low Effective Addition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12632-12640. [PMID: 38832432 DOI: 10.1021/acs.langmuir.4c01096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
The poor compatibility with nonpolar lubricant still hinders the application of carbon dots (CDs) in lubrication. In addition, research proves that the existence of ionic structure and active groups on CDs are conducive to their lubricity. In order to obtain the ionic structures and good oil compatibility synchronously, a kind of ionic nitrogen-doped CDs (NCDs) was synthesized via the alkylation of nitrogen in NCDs and anion exchange. The new material could exhibit good tribological performance as poly alpha olefins (PAO4) additives with low addition. Moreover, an ionic liquid, [N44HH][DEHP], with the same anion was chosen as a comparison to investigate the role of NCD cations. The surface analyses demonstrate that NCD cations and phosphate ester anions adsorb on the friction interface to play a synergistic lubrication role during the friction process, which could generate a superior carbon-based tribofilm.
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Affiliation(s)
- Haocheng Wang
- School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266033, P. R. China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Qinglun Che
- School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266033, P. R. China
| | - Yi Li
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- Qingdao Center of Resource Chemistry & New Materials, Qingdao 266071, P. R. China
| | - Songwei Zhang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- Qingdao Center of Resource Chemistry & New Materials, Qingdao 266071, P. R. China
| | - Xiaoling Liu
- School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266033, P. R. China
| | - Jianjun Zhang
- School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266033, P. R. China
| | - Litian Hu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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Gao M, Zhang Q, Wu S, Wu L, Cao P, Zhang Y, Rong L, Fang B, Yuan C, Yao Y, Wang Y, Sun H. Contamination Status of Novel Organophosphate Esters Derived from Organophosphite Antioxidants in Soil and the Effects on Soil Bacterial Communities. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10740-10751. [PMID: 38771797 DOI: 10.1021/acs.est.3c10611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
The contamination status of novel organophosphate esters (NOPEs) and their precursors organophosphite antioxidants (OPAs) and hydroxylated/diester transformation products (OH-OPEs/di-OPEs) in soils across a large-scale area in China were investigated. The total concentrations of the three test NOPEs in soil were 82.4-716 ng g-1, which were considerably higher than those of traditional OPEs (4.50-430 ng g-1), OPAs (n.d.-30.8 ng g-1), OH-OPEs (n.d.-0.49 ng g-1), and di-OPEs (0.57-21.1 ng g-1). One NOPE compound, i.e., tris(2,4-di-tert-butylphenyl) phosphate (AO168 = O) contributed over 65% of the concentrations of the studied OPE-associated contaminants. A 30-day soil incubation experiment was performed to confirm the influence of AO168 = O on soil bacterial communities. Specific genera belonging to Proteobacteria, such as Lysobacter and Ensifer, were enriched in AO168 = O-contaminated soils. Moreover, the ecological function of methylotrophy was observed to be significantly enhanced (t-test, p < 0.01) in soil treated with AO168 = O, while nitrogen fixation was significantly inhibited (t-test, p < 0.01). These findings comprehensively revealed the contamination status of OPE-associated contaminants in the soil environment and provided the first evidence of the effects of NOPEs on soil microbial communities.
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Affiliation(s)
- Meng Gao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Qiuyue Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Shanxing Wu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lina Wu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Peiyu Cao
- Department of Global Development, College of Agriculture and Life Science, and Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, New York 14850, United States
| | - Yaozhi Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lili Rong
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Bo Fang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Chaolei Yuan
- School of Agriculture, Sun Yat-sen University, Shenzhen 518107, China
| | - Yiming Yao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yu Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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Jiang H, Hou X, Dearn KD, Su D, Kamal Ahmed Ali M. Thermal stability enhancement mechanism of engine oil using hybrid MoS2/h-BN nano-additives with ionic liquid modification. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.10.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Physical and chemical properties of binary mixtures of dibutylammonium-based ionic liquids and water. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2021. [PMCID: PMC8591436 DOI: 10.1007/s43153-021-00174-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Ionic liquids are used in different processes owing to their low vapor pressure, large viscosity range, chemical and thermal stability, and superior conductance even without water. These features make them flexible and tunable, indicating their possible use as substitutes for commonly used compounds in many processes. The objective of this study was to evaluate the properties of aqueous binary solutions for three different ionic liquids (ILs): dibutylammonium acetate, dibutylammonium propanoate, and dibutylammonium butanoate. The measured properties were density, speed of sound, and conductivity, and their isentropic compressibility and thermal expansion coefficient were calculated based on these properties. The temperature range used for measurements was 293.15–323.15 K. Mathematical models were used for each ionic liquid + water mixture to fit the density and speed of sound data. The increase in the alkyl chain leads to a tendency to decrease the values of density, speed of sound, and conductivity of the solutions. However, decreasing the dilution in water, the density, the conductivity and the speed of sound initially increase and then decrease, exhibiting a maximum in the initial water concentration range which indicates the formation of aggregates. Critical micellar concentrations at 298 K were determined through conductivity data. Enhancing the temperature leads to a decrease on density and sound velocity.
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Physicochemical and tribological performances of GAILs as lubricants for copper and aluminum friction counterfaces. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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The effect of chemical structure on the tribological performance of perfluorosulfonate ILs as lubricants for Ti-6Al-4V tribopairs. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114286] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Khan A, Sharma OP, Khatri OP. Ionic Liquids-Based Aqueous Lubricants: Emulsion Stability to Enhancement of Surface Wettability and Tribological Properties. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c05046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Amzad Khan
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Om P. Sharma
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India
| | - Om P. Khatri
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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Oil-miscible, halogen-free, and surface-active lauryl sulphate-derived ionic liquids for enhancement of tribological properties. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wang L, Liu Y, Lu H, Huang Z. Recycling of phosphorus-containing plastic based on the dual effects of switchable hydrophilicity solvents. CHEMOSPHERE 2020; 259:127402. [PMID: 32593819 DOI: 10.1016/j.chemosphere.2020.127402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/05/2020] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
Plastic waste has caused severe environmental problems. Some additives in plastics, like organophosphates, enter the environment with plastic waste, causing significant harm to plants and creatures. However, the primary method of recycling phosphorus-containing plastic, especially polycarbonate and acrylonitrile-butadiene-styrene copolymer (PC/ABS), is a mechanical method, which not only does not effectively separate plastics and organophosphates but also tends to cause polymer degradation during recycling. In order to overcome these problems, we proposed an efficient and sustainable approach to recycle of phosphorus-containing plastic. In this method, N, N-dimethylcyclohexylamine (DMCHA), a switchable hydrophilicity solvent (SHS), was used to react with and extract organophosphates in plastic, achieving the goal of complete separation of plastic and organophosphates. PC/ABS can be recovered by precipitation. Dissolved organophosphates can also be easily recovered due to the switching characteristics of SHS. Both of recovered materials were of high purity and were close to virgin materials. This technique is an easy and efficient approach to separate plastic and organophosphates, which has excellent application prospects in recycling phosphorus-containing plastic.
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Affiliation(s)
- Li Wang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China
| | - Ya Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China; Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, 610500, PR China.
| | - Zhiyu Huang
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, 610500, PR China; School of New Energy and Materials, Southwest Petroleum University, Chengdu, 610500, PR China.
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Ali MKA, Xianjun H. Colloidal stability mechanism of copper nanomaterials modified by bis(2-ethylhexyl) phosphate dispersed in polyalphaolefin oil as green nanolubricants. J Colloid Interface Sci 2020; 578:24-36. [PMID: 32504903 DOI: 10.1016/j.jcis.2020.05.092] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/19/2020] [Accepted: 05/24/2020] [Indexed: 02/05/2023]
Abstract
Nanomaterials stabilization in lube oils poses an acute challenge in nanolubricants/nanofluids formulation. This study aims to improve the dispersion stability of copper (Cu) nanomaterials in polyalphaolefin-6 (PAO6) oil to overcome the agglomeration/sedimentation problem. Here, we modified the surface of Cu nanomaterials using bis(2-ethylhexyl) phosphate (IL) to enhance the electrostatic repulsion force in Cu nanomaterials. We evaluated the dispersion behavior of Cu nanolubricants by visual observation, ultraviolet-visible spectroscopy, dynamic light scattering, and zeta potential measurements. Furthermore, we determined the rheological and thermo-oxidation behavior of Cu nanolubricants using Brookfield viscometer, thermogravimetric, and Fourier transform infrared. Our experiments showed that dispersion stability depends on Cu concentration and settling time. IL demonstrated effective miscibility when blended with PAO6 oil and displayed non-Newtonian behavior. The results suggest that Cu modified by IL provides superior dispersion in PAO6 oil without sedimentation for 60 days, compared to unmodified Cu. Moreover, the hydrodynamic diameter of the modified Cu did not exceed 240 nm even after 60 days of preparation. The excellent dispersion behavior can be ascribed to the domination of the electrostatic repulsion forces over the inter-nanomaterials van der Waals interactions, which is related to the formation of the electrical adsorption layer on the Cu surface. The obtained colloidal dispersions have the potential to be utilized as green nanolubricants for lubricating tribological systems.
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Affiliation(s)
- Mohamed Kamal Ahmed Ali
- Automotive and Tractors Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt; Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China; Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, China.
| | - Hou Xianjun
- Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China; Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, China.
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Kontham V, Padmaja KV, Madhu D. Synthesis of ricinoleate anion based ionic liquids and their application as green lubricating oil additives. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2020.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Low viscosity lactam-based ionic liquids with carboxylate anions: Synthesis, characterization, thermophysical properties and mutual miscibility of ionic liquid with alcohol, water, and hydrocarbons. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113586] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Two fatty acid anion-based ionic liquids - part I: Physicochemical properties and tribological behavior as neat lubricants. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112827] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Khazalpour S, Yarie M, Kianpour E, Amani A, Asadabadi S, Seyf JY, Rezaeivala M, Azizian S, Zolfigol MA. Applications of phosphonium-based ionic liquids in chemical processes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01901-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Fatty acid-derived ionic liquids as renewable lubricant additives: Effect of chain length and unsaturation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112322] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Rivera N, Blanco D, Viesca J, Fernández-González A, González R, Battez AH. Tribological performance of three fatty acid anion-based ionic liquids (FAILs) used as lubricant additive. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111881] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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Fatty acids-derived protic ionic liquids as lubricant additive to synthetic lube base oil for enhancement of tribological properties. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111444] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Battez AH, Rivera N, Blanco D, Oulego P, Viesca J, González R. Physicochemical, traction and tribofilm formation properties of three octanoate-, laurate- and palmitate-anion based ionic liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.050] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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