Article
Materials Science, Multidisciplinary
Javier Faes, Ruben Gonzalez, Antolin Hernandez Battez, David Blanco, Alfonso Fernandez-Gonzalez, Jose Luis Viesca
Summary: In this study, three novel fatty acid anion-based ionic liquids showed similar tribological behavior as lubricants for various material pairs, including steel, aluminum alloy, bronze, cast iron, and tungsten carbide. The corrosion behavior of the ionic liquids was mainly observed on the bronze surface, while XPS analysis indicated low chemical interaction with the surfaces of the tested materials.
Article
Green & Sustainable Science & Technology
Carlton J. Reeves, Ashish K. Kasar, Pradeep L. Menezes
Summary: Environmentally friendly lubricants, including room-temperature ionic liquids (RTIL), are becoming popular due to their potential to replace toxic petroleum-based oils, although their thermal stability remains a concern. RTILs show promising tribological properties and enhanced thermal stability compared to bio-based and petroleum-based oils, attributed to their lamellar-like liquid crystal structure, electrostatic potential dipolar, and molecular adsorption layer.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Mechanical
Ashish K. Kasar, Carlton J. Reeves, Pradeep L. Menezes
Summary: This study investigated the addition of various types of solid particles and carbon nanotubes in Ionic Liquids, finding that nano-sized particles improved tribological properties. The influence of particulate additives was empirically modeled using a fractal function based on particle size and roughness.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Raimondas Kreivaitis, Arturas Kupcinskas, Audrius Zunda, Thi Na Ta, Jeng Haur Horng
Summary: The tribological properties of ionic liquids were compared at different temperatures, showing a decrease in lubricity at higher temperatures. The performance difference between different friction pairs varied. The investigated ILs performed better than motor oil in terms of lubrication.
Article
Chemistry, Physical
Md Hafizur Rahman, Ting Liu, Tatianna Macias, Manoranjan Misra, Manish Patel, Ashlie Martini, Pradeep L. Menezes
Summary: The friction and wear behavior of bio-based [P6,6,6,14][Sacc] and halogen-based [P6,6,6,14][NTF2] ionic liquids at steel sliding interfaces were studied. [P6,6,6,14][Sacc] had higher viscosity, better friction and wear protection, lower density, comparable thermal stability, more favorable wettability, and better corrosion performance compared to [P6,6,6,14][NTF2]. Simulations showed that the cohesion interaction energy was stronger for [P6,6,6,14][Sacc], contributing to its ability to form an effective adsorption film and reduce friction and wear across different temperatures.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Khodor Nasser, Jose M. Lineira del Rio, Enriqueta R. Lopez, Josefa Fernandez
Summary: This study examines the tribological performance of three ionic liquids combined with graphene nanoplatelets as hybrid additives for a polyalphaolefin base oil. The hybrid combinations show improved friction reduction compared to binary nanolubricants and neat PAO mixtures, with dispersions containing low concentrations of GnP showing better effectiveness. Additionally, the combination of 0.05 wt% GnP and 1 wt% IL leads to significant reductions in friction and wear.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Zhaozhao Yang, Bian Guo, Yijing Liang, Qing Huang, Feizhou Li, Ruozheng Wang, Xiaoyan Yan, Bo Yu, Qiangliang Yu, Meirong Cai
Summary: Two oil-soluble ionic liquids with the same anion but different cations were synthesized and added to PAO10 to improve its physicochemical and frictional properties. One of the ionic liquids formed a chemically reactive film between steel/steel friction pairs, reducing friction and wear.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
M. Bartolome, D. Goncalves, A. Garcia Tuero, R. Gonzalez, A. Hernandez Battez, J. H. O. Seabra
Summary: Two phosphonium-derived ionic liquids (IL1 and IL2) were added to lithium complex (G1) and anhydrous calcium-based (G2) greases at a concentration of 5 wt%. Friction torque and wear tests were performed to evaluate the effects of the ILs on the friction and wear properties of the greases. IL2 showed improved friction reduction performance for both greases, especially G1. Both ILs improved the antiwear behavior of G2 and IL2 also helped alleviate the oxidation and thermal aging issues in G2.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biotechnology & Applied Microbiology
Fabiane O. Farias, Ariel A. C. Toledo Hijo, Cassamo U. Mussagy, Ramon S. B. Ferreira, Valeria C. Santos-Ebinuma, Eduardo A. C. Batista, Antonio J. A. Meirelles
Summary: This study investigates two different approaches for vegetable oil deacidification using an ionic liquid as a solvent. The oligomeric IL approach removes oleic acid from soybean oil, and the multicomponent IL approach achieves a FFA removal rate of 85%. Both methods result in lower oil loss compared to conventional chemical processes.
FOOD AND BIOPRODUCTS PROCESSING
(2023)
Article
Engineering, Chemical
Tobias Amann, Felix Gatti, Ke Li, Yakub Demirel, Andreas Kailer, Hao Feng, Chengqing Yuan
Summary: The aim of the work was to improve the tribological properties of an ATF oil by using additives. Different ILs were tested in material pairings and it was found that certain ILs led to more than 50% reduction in wear. Additionally, the study showed that the selected ILs had varying effects on friction behavior at different temperatures.
LUBRICATION SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Mariana T. Donato, Jonas Deuermeier, Rogerio Colaco, Luis C. Branco, Benilde Saramago
Summary: The goal of this study was to develop new protic ionic liquids (PILs) as additives for lubrication of micro and nanoelectromechanical systems (MEMS and NEMS). Ten PILs with different combinations of cations such as [MIMH], [4-picH], [PyrH], [DBUH], and [TMGH], and anions such as [HSO4] and [MeSO3] were tested as additives in polyethylene glycol (PEG200) to lubricate steel/silicon and silicon/silicon contacts. The best performing additive was found to be [4-picH][HSO4], which formed a protective film on the silicon surface, resulting in a 15-fold reduction in wear compared to PEG200 alone.
Article
Engineering, Chemical
Zijing Bai, Jixia Qiu, Dongqian Zhang, Peng Gao, Zengyun Jian
Summary: In this study, a lubricant additive based on protic ionic liquids was synthesized, which can significantly decrease the friction coefficient and wear volume. The excellent tribological performances were confirmed to be due to the physical adsorption film and chemical reaction film generated during the friction process. This type of ionic liquid additives has great potential to be widely employed in the industrial field, thanks to their simple synthesis, exceptional tribological abilities, convenient purification procedure, and low cost.
Article
Chemistry, Physical
A. Garcia Tuero, M. Bartolome, D. Goncalves, J. L. Viesca, A. Fernandez-Gonzalez, J. H. O. Seabra, A. Hernandez Battez
Summary: The study investigated the effects of three phosphonium-based ionic liquids on the performance of two greases. [P-6,P-6,P-6,P-14][TCM] improved thermal stability, while [P-6,P-6,P-6,P-14][BEHP] showed superior antiwear behavior.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Mechanical
Jing Hua, Marcus Bjorling, Roland Larsson, Yijun Shi
Summary: Research shows that the properties of green lubricants can be influenced by the content of CO2 and water, resulting in changes in viscosity and friction. Therefore, by adjusting the CO2 and water content, the performance of the lubricant can be controlled.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Florian Hausen
Summary: Ionic liquids (ILs) have significant applications in lubrication, catalysis, and battery electrolytes. The time required to form a stable interface between ILs and charged surfaces is crucial in many applications. This study demonstrates the probing of ILs' relaxation times using friction force microscopy, showing that the friction force is highly sensitive to even subtle changes in the ILs' interfacial configuration. Various relaxation processes with different time scales are observed, and a significant difference is found depending on the direction of applied potential switching. Furthermore, variations in height after potential steps and the presence of trace amounts of water are discussed.
Article
Chemistry, Multidisciplinary
Sandra Rodriguez-Varillas, Tania Fontanil, Alvaro J. Obaya, Alfonso Fernandez-Gonzalez, Clarissa Murru, Rosana Badia-Laino
Summary: Carbon dots obtained from tomato juice exhibit high antioxidant power and minimal toxicity to healthy cells.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Alberto Garcia, Guillermo D. Valbuena, Alejandro Garcia-Tuero, Alfonso Fernandez-Gonzalez, Jose L. Viesca, Antolin Hernandez Battez
Summary: This study aims to investigate the compatibility of four conventional automatic transmission fluids (ATFs) with three types of polymer materials and assess their feasibility in electric vehicle transmissions. The results showed that PEEK and PTFE exhibited minimal changes in mechanical properties, while PA66 experienced significant variations in elongation at break. The aging time had a greater impact on the polymer properties than the type of ATF used. All the ATFs demonstrated high compatibility with PEEK and PTFE, and medium compatibility with PA66.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
E. Rodriguez, N. Rivera, A. Fernandez-Gonzalez, T. Perez, R. Gonzalez, A. Hernandez Battez
Summary: This study focuses on the electrical compatibility of three automatic transmission fluids (ATFs) in electrified drivelines and their changes in electrical conductivity during oxidation. The results indicate that the higher content of additive leads to lower variations in electrical conductivity, and electrical conductivity measurements are more suitable for monitoring oil thermo-oxidative degradation at initial stages compared to FT-IR measurements. While conventional ATFs maintain good electrical compatibility in electrified drivelines, their materials compatibility and copper corrosion protection for electrical components should also be tested.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Alejandro Garcia-Tuero, Beatriz Ramajo, Guillermo D. Valbuena, Alfonso Fernandez-Gonzalez, Rafael Mendoza, Alberto Garcia, Antolin Hernandez Battez
Summary: This study investigated the compatibility of four conventional ATFs with three elastomers and examined their performance and changes through various testing methods. The results showed that FKM and silicone materials exhibited high or medium compatibility with the ATFs, while EPDM materials had low compatibility and may result in changes in composition and structure.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
M. Blanco-Vieites, D. Suarez-Montes, A. Hernandez Battez, E. Rodriguez
Summary: In this study, two cyanobacteria species were cultured using highly sulfated wastewater as the culture medium, and the results showed that Arthrospira maxima is suitable for bioremediation of sulfated wastewater. The growth performance of A. maxima in this wastewater was 2.16 times higher than the initial value, and the sulfate removal rate increased from 23.3% to 73%. This study provides the most efficient data on sulfate microalgal bioremediation to date.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Engineering, Marine
L. A. Diaz-Secades, R. Gonzalez, N. Rivera
Summary: This study investigates the feasibility of recovering waste heat from marine diesel engine blocks and evaluates the energy, economic, and environmental impacts. The findings indicate that waste heat recovery can significantly reduce CO2 and NOx emissions from ships.
Article
Chemistry, Multidisciplinary
Noelia Rivera, Jose Luis Viesca, Alberto Garcia, Jose Prado, Luis Lugo, Antolin Hernandez Battez
Summary: This study investigates the impact of oxidation on the thermophysical properties and cooling performance of ATFs, finding that molecular structure has a greater influence on thermal conductivity and heat capacity than on density and viscosity. ATFs formulated with API Group III base oils show better cooling performance. The use of figures-of-merit (FOMs) is recommended for comparing cooling performance instead of relying on a single property.
APPLIED SCIENCES-BASEL
(2022)
Article
Biotechnology & Applied Microbiology
M. Blanco-Vieites, V Casado, A. Hernandez Battez, E. Rodriguez
Summary: This study demonstrates that culturing Arthrospira maxima in highly sulphated wastewater allows for bioremediation while producing value-added products. Results show that A. maxima can grow well in sulphated wastewater and significantly reduce sulphate content within the first 6 days. The resulting biomass can be used to extract C-phycocyanin and crude lipid extract. Therefore, the hypothesis of using A. maxima industrial cultures for wastewater remediation and value-added product production is confirmed.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Mechanical
Alejandro Garcia Tuero, Noelia Rivera, Eduardo Rodriguez, Alfonso Fernandez-Gonzalez, Jose Viesca Luis, Antolin Hernandez Battez
Summary: This study investigated the influences of additive concentrations on the electrical compatibility and tribological performances of three commercial automatic transmission fluids (ATFs). The results showed that all the ATFs maintained electrical compatibility, dissipative performance, and sufficiently high breakdown voltage even at increasing additive concentrations. The ATFs formulated with API Group III base oils exhibited improved wear reduction at the highest additive concentrations, attributed to the formation of iron phosphates and polyphosphates on the worn surface.
Article
Chemistry, Analytical
Christian Chimeno-Trinchet, Maria Emilia Pacheco, Alfonso Fernandez-Gonzalez, Rosana Badia-Laino
Summary: A fast and efficient method was developed to obtain europium(III)-doped surface-modified carbon dots with a hydrophobic coating. The surface functionalization improved the dispersibility of the nanoparticles in non-polar media and modified the accessibility of water molecules to the europium ions. The developed nanochemosensor showed high stability in both photoluminescent signal intensity and dispersions, and had a low detection limit and fast response time for water determination in toluene.
Article
Engineering, Marine
Luis Alfonso Diaz-Secades, R. Gonzalez, N. Rivera, Elena Montanes, Jose Ramon Quevedo
Summary: Waste heat recovery is an effective method to improve engine efficiency and meets the needs of the maritime industry. The proposed waste heat recovery system can recover high, medium, and low-grade waste heat by using steam Rankine cycle, organic Rankine cycle, thermoelectric harvesters, and desalination. It effectively recovers waste energy, offers economic benefits, and satisfies the daily demand for fresh water.
Article
Chemistry, Multidisciplinary
Alfonso Fernandez-Gonzalez, alvaro J. Obaya, Christian Chimeno-Trinchet, Tania Fontanil, Rosana Badia-Laino, Snezana Agatonovic-Kustrin
Summary: This study explores the feasibility of using ATR-FTIR spectroscopy to identify ABO blood types. The results show that the use of various classification algorithms can predict blood types to a greater extent than random selection, although not as accurately as biochemical blood typing tools. Additionally, the methodology has higher sensitivity in identifying B antigens compared to A antigens.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Javier Faes, Ruben Gonzalez, David Blanco, Alfonso Fernandez-Gonzalez, Antolin Hernandez-Battez, Patricia Iglesias, Jose Luis Viesca
Summary: This study investigates the use of an ionic liquid obtained from fatty acids (FAIL) as an additive in two different base oils. The results show that FAIL is compatible with the base oils and can improve their viscosity and antiwear performance. The tribological performance of the base oils and their blends with FAIL varies under different lubrication conditions.
Article
Chemistry, Physical
Rajalaxmi Sahoo, C. Reshma, D. S. Shankar Rao, C. V. Yelamaggad, S. Krishna Prasad
Summary: This study investigates the influence of the flexible spacer parity of a guest photoactive liquid crystalline dimer on the photonic bandgap features of the cholesteric and twist grain boundary smectic C phases of the host molecule. The results show that the parity of the photoactive dimer affects the width of the photonic bandgap and the blue-shift of the cholesteric phase. Additionally, the parity of the dimer also affects the layer spacing and two-dimensional periodicity of the liquid crystalline phases.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Sara Rozas, Alberto Gutierrez, Mert Atilhan, Alfredo Bol, Santiago Aparicio
Summary: This study presents a multiscale theoretical investigation on the use of bifunctional hydrophobic Deep Eutectic Solvent for carbon capture using tetrapropylammonium chloride, acetic acid, and ethanolamine. The characterization includes nanoscale analysis of CO2 absorption mechanisms and changes in liquid phase properties during gas capture.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Tabouli Eric Da-yang, Alhadji Malloum, Jean Jules Fifen, Mama Nsangou, Jeanet Conradie
Summary: In this study, the potential energy of different glycine tautomers and their interaction with Cu2+ cations was investigated. The results showed that the solvation medium and the presence of Cu2+ cations influenced the stability of glycine tautomers.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Xiaoliang Gou, Nan Ye, Qingqing Han, Junjie Cui, Long Yi Jin
Summary: In this study, amphiphilic rod-coil molecules with rigid DSA parts and flexible oligoether chains were designed and their assembly capacities were investigated. The morphology of the molecular aggregates was influenced by the pH of the solution and UV light, and the aggregates showed adsorption capacity for nitroaromatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Shuang Liu, Liyan Shan, Cong Qi, Wenhui Zhang, Guannan Li, Bei Wang, Wei Wei
Summary: Optimizing the design of styrene-butadiene-styrene copolymer (SBS) is crucial for producing cost-effective SBS modifiers and improving road quality. This study examined the influence of SBS content and molecular structure on viscosity and compatibility. The results showed that the viscosity contribution of SBS is determined by its molecular structure and phase morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Artem A. Petrov, Ekaterina A. Titova, Aydar A. Akhmadiyarov, Ilnaz T. Rakipov, Boris N. Solomonov
Summary: This work focuses on the thermochemistry of solvation of azeotropes. The enthalpies of dissolution of azeotropes in different mediums were determined, and the impact of the structure of the azeotropes on their properties in solution was discussed. A correlation between enthalpies of solvation and molar refraction was used to determine the vaporization enthalpies of azeotropes for the first time. The results were found to be consistent with literature data, obtained using direct and calculated methods. These findings contribute to the analysis of the structure-property relationships of azeotropes.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
L. V. Kamaeva, E. N. Tsiok, N. M. Chtchelkatchev
Summary: Understanding the correlations between liquids and solids allows us to predict the thermodynamic parameter range favorable for the formation of intriguing solid phases by studying liquids. In this study, we experimentally and theoretically investigated an Al-Cu-Co system within different composition ranges, and identified high-temperature solid phases. Our findings demonstrated the correlation between the boundaries of different solid phases and undercooling and viscosity in the concentration area.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
R. Aneesh Kumar, S. Jamelah Al-Otaibi, Y. Sheena Mary, Y. Shyma Mary, Nivedita Acharjee, Renjith Thomas, Renjith Raveendran Pillai, T. L. Leena
Summary: In this study, the interactions between doped and pristine coronenes and adenine nucleobases were investigated using Density Functional Theory. The optimal configurations, adsorption energies, charge transfer, and electrical properties of each complex were calculated. It was found that doped coronene had stronger adsorption strength and charge transfer compared to pristine coronene. The stability of the complexes was attributed to non-covalent interactions in the interactive region. The change in electrical conductivity of coronenes after adsorption suggested their sensitivity towards DNA bases. The predicted energy gap and prolonged recovery time for adenine-coronene configurations indicated the potential application of pristine/doped coronene in DNA detection.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Gang Zhou, Yongwei Liu, Biao Sun, Zengxin Liu, Cuicui Xu, Rulin Liu, Qi Zhang, Yongmei Wang
Summary: The CFD-DEM method was used to simulate the dust deposition pattern in the bronchus of anchor digging drivers, revealing the highest dust concentration in the vortex region of the working face. The study also found a positive correlation between dust particle diameter and bronchial deposition rate, and a negative correlation with alveolar deposition rate.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Yan Zhang, Yafei Luo, Lingkai Tang, Mingyan E, Jianping Hu
Summary: This study investigates the effects of different transition metal decorations on B12N12 nanocages on the adsorption properties of nitrosourea drugs using computational methods. The results reveal the presence of weak non-covalent interactions between metals and nanocages, and the interaction between drugs and nanocages plays a significant role in drug adsorption. Compared to free drugs, the adsorption of drugs on nanocages can facilitate electron transfer, reduce energy gaps and chemical hardness, indicating activity at the target site.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
C. I. Alcolado, J. Poblete, L. Garcia-Rio, E. Jimenez, F. J. Poblete
Summary: In this study, the selective oxidation of aromatic aldehydes was investigated using Ru(VI) as a catalyst and hexacyanoferrate (III) as a cooxidant in an alkaline medium. The reaction mechanism involves complex reaction orders for the oxidant and the aromatic aldehyde, while the reaction order for Ru(VI) is one. The proposed mechanism includes two catalytic cycles and the formation and decomposition of complexes. Quantitative structure-activity relationship analysis showed that deactivating groups in the para-position enhance the process.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Hongyan Huang, Chunquan Li, Siyuan Huang, Yuling Shang
Summary: This study examines the sensitivity of the thermal conductivity of water-based alumina nanofluids to changes in concentration, sphericity, and temperature. The results show that volume fraction and temperature have a significant impact on the thermal conductivity, while sphericity also needs to be considered. A support vector machine regression model was created to analyze the sensitivity of the thermal conductivity to different parameters. The findings indicate that temperature, sphericity, and volume fraction are the most sensitive variables.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Correction
Chemistry, Physical
V. M. Pergamenshchik, T. Bryk, A. Trokhymchuk
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Valentyn Rudenko, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, Yuriy Garbovskiy
Summary: This paper reports on the synthesis, structural characterization, spectral and nonlinear-optical properties of glass nanocomposites made of glass forming ionic liquid crystals and nanoparticles. The study reveals that by exciting the nanocomposites within their absorption band, a control over effective optical nonlinearities can be achieved, allowing the modification of the magnitude and sign of the effective nonlinear absorption coefficient. The proposed strategy using metal-alkanoates based glass-forming ionic liquid crystals and nanoparticles shows great potential for the development of nanophotonics and plasmonics technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
