Article
Materials Science, Multidisciplinary
Dapeng Gu, Shuaibing Wang, Jingchao Zhang, Ke Liu, Suwen Chen, Xiaofan Chen, Zibo Wang, Jintu Liu
Summary: This study investigates the synergistic effect of filling ultra-high molecular weight polyethylene (UHMWPE) and heat treatment on the tribological properties of poly(methyl methacrylate) (PMMA)-based composites. The results show that the friction coefficient and wear rate of the composites are significantly reduced by the combination of UHMWPE filling and heat treatment. The improvement in friction reduction is attributed to the lubrication effect of the filled UHMWPE, while the enhancement in wear resistance is attributed to the improvement in hardness and microstructure compactness caused by heat treatment.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Coatings & Films
Gozde Celebi Efe, Elif Yenilmez, Ibrahim Altinsoy, Serbulent Turk, Cuma Bindal
Summary: The present study successfully coated a UHMWPE-HAp composite film on the surface of Ti6Al4V alloy, achieving surface modification of the material. Various analyses were conducted on the composite coating, demonstrating strong adhesion, good wear resistance, and potential application in artificial hip joint replacements.
SURFACE & COATINGS TECHNOLOGY
(2021)
Review
Polymer Science
Mohammed Abdul Samad
Summary: Polymer coatings have gained attention due to their low cost, ease of coating, low friction, and good anti-corrosion properties. Among various polymers, UHMWPE stands out for its excellent tribological properties, despite limitations such as low load-bearing capacity and low thermal stability. Researchers have developed various routes, including composite coatings, film systems, and dual film systems, to improve the tribological performance of UHMWPE coatings.
Article
Polymer Science
Glendimar Molero, Chia-Ying Tsai, Cong Liu, Hung-Jue Sue, Shuntaro Uenuma, Koichi Mayumi, Kohzo Ito
Summary: The mechanical and scratch behaviors of polyrotaxane (PR) modified poly(methyl methacrylate) (PMMA) were systematically investigated in this study. The findings suggest that the methacrylate functional group on PR induces favorable molecular interactions with the PMMA matrix, leading to improved tensile and compressive properties and significantly enhanced scratch resistance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Jun Zhong, Xinyue Zhang, Xiaofeng Yu, Xuanyu Shi, Shihao Sun, Li Yang, Min Zuo, Yihu Song, Qiang Zheng
Summary: The selective distribution of silica nanoparticles grafted with crosslinked PMMA in PMMA/SAN blend was studied. Highly crosslinked PMMA chains mainly located in the PMMA-rich domains, while linear PMMA chains mainly located at the blend matrix interface. NPs grafted with slightly crosslinked chains were partially located at the interface and partially in the PMMA-rich domains. The deviation between theoretical prediction and actual location of modified NPs may be related to the heterogeneity of miniemulsion polymerization. The different locations of modified NPs induced by different grafted chain structures can result in various compatibilization effects on PMMA/SAN blend.
Article
Materials Science, Multidisciplinary
Alireza Farazin, Alireza Shakeri, Hossein Mahdavi
Summary: In this study, an amphiphilic block copolymer suitable for modification of forward osmosis (FO) membrane support layers was synthesized using the ATRP method. The addition of this copolymer significantly improved the performance of the support layer, and the best performing membrane exhibited satisfactory FO performance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Ahmed Fouly, Ahmed Mohamed Mahmoud Ibrahim, El-Sayed M. Sherif, Ahmed M. R. FathEl-Bab, A. H. Badran
Summary: Increasing the concentration of HA nanoparticles enhances the mechanical properties of PMMA nanocomposites and reduces the friction coefficient and wear loss.
Article
Engineering, Mechanical
Tun Cai, Shengpeng Zhan, Tian Yang, Yinhua Li, Dan Jia, Jiesong Tu, Jian Li, Haitao Duan
Summary: UHMWPE-g-AA samples were prepared by ultraviolet-light-induced surface grafting, and their tribological properties in seawater were studied using ball-on-disk tribology experiments. The results show that the PAA lubricating brush layer improves the fluid medium at the friction surface/interface, reducing the friction coefficient and wear amount of the friction pair.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Neha Singh, Sujeet K. Sinha
Summary: This study investigated hybrid polymeric composites of epoxy with UHMWPE and MoS2 fillers, where the addition of base oil SN150 showed excellent tribological performance under constant contact pressure and speed, with low wear rate and friction coefficient. The fillers also imparted hydrophobic properties to the epoxy surface, reducing adhesion and friction.
Article
Engineering, Mechanical
M. Alvarez-Vera, Javier A. Ortega, I. A. Ortega-Ramos, H. M. Hdz-Garcia, R. Munoz-Arroyo, J. C. Diaz-Guillen, J. L. Acevedo-Davila, M. A. L. Hernandez-Rodriguez
Summary: This study investigated the microstructure and tribological performance of laser microtextured CoCr alloy discs against UHMWPE, showing that various texturing patterns can reduce friction and wear on UHMWPE pins. The laser surface texturing method improved the nanohardness and reduced friction coefficients, providing insights for enhancing the longevity of MoP joint replacements.
Article
Polymer Science
Hyeyoung Park, Martin Wiesing, Philipp Zimmermann, Andreas Janke, Simona Schwarz, Jurgen Nagel
Summary: This article investigates a new approach for functionalizing a surface by using a conventional laser to generate chemical activation. By optimizing laser parameters, poly(ethyleneimine) (PEI) was successfully grafted onto poly(methyl methacrylate) (PMMA) and the modified surface was characterized and analyzed.
Article
Polymer Science
Hamza Mahmoud Aboelanin, Stepan Podzimek, Vladimir Spacek
Summary: This study focuses on the detailed characterization of the molecular structure and dilute solution properties of highly dense star-like polymers of poly(methyl methacrylate) and poly(n-butyl methacrylate). The comparison of refractive index increment with corresponding linear homopolymers was conducted. The prepared polymers were characterized using size exclusion chromatography, multi-angle light scattering detector, and online viscometer. The obtained data allowed for the determination of arm distribution, average number of arms per molecule, and molar mass dependency of the draining factor. The relation between the number of arms per molecule and molar mass was estimated and compared with true values.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Xinyue Zhang, Haimo Zhang, Min Zuo, Jun Zhong, Xuanyu Shi, Shihao Sun, Li Yang, Yihu Song, Qiang Zheng
Summary: The effect of selective distribution and migration behavior of two types of modified nanoclays on the phase behavior of PMMA/SAN blends is investigated. The different grafting density and chain lengths result in different initial locations and subsequent migration behaviors of the nanoclays. The dense and short chain nanosheets are distributed at the interfacial region and form percolation networks, significantly blocking the concentration fluctuation and domain coarsening. The sparse and long chain nanosheets are initially distributed in the SAN-rich domains and slowly migrate to the interfacial region, inhibiting phase separation and stabilizing the morphology.
Article
Polymer Science
Yu-Liang Lin, Song-Yu Tsai, Hung-Chieh He, Lin-Ruei Lee, Jhih-Hao Ho, Chien-Lung Wang, Jiun-Tai Chen
Summary: This study fabricated sc-PMMA nanorods using various pore sizes AAO templates to investigate its crystallization behavior under nanoconfinement. The results show that the crystallization kinetics of sc-PMMA inside nanopores differs significantly from the bulk state, and the preferred orientation of sc-PMMA crystallites is mainly influenced by the degree of spatial confinement and the polymer molecular weight. This work provides a deeper understanding of sc-PMMA under nanoconfinement and offers opportunities for the applications of supramolecular nanostructures in miniaturized devices.
Article
Materials Science, Multidisciplinary
Gnana Saurya Vankayalapati, Ethan Kaplan, Lisa M. Lallo, Nikhil Victor, Craig M. Clemons, John M. Considine, Kevin T. Turner
Summary: Cellulose nanofibrils (CNFs) show promise as reinforcements for polymer fibers, enhancing their strength, stiffness, and fracture toughness. Composite fibers of Poly(methyl methacrylate) (PMMA) and CNFs with varied CNF content were successfully fabricated, leading to significant improvements in mechanical properties. The addition of low-weight fractions of CNFs resulted in increased Young's modulus, yield strength, and fracture toughness in the composite fibers.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Karla J. Moreno, Maria Teresa Hernandez-Sierra, Jose E. Baez, Eloy Rodriguez-deLeon, Luis Daniel Aguilera-Camacho, J. Santos Garcia-Miranda
Summary: The study showed that using xanthophylls as additives for green lubricants can improve the wear protection of bio-lubricants, reduce wear rate, but have a minimal impact on the friction coefficient. Astaxanthin performs the best as an additive, and significant improvements in the oxidation of castor oil were also observed.
Article
Biochemical Research Methods
Gustavo Ochoa-Vazquez, Boris Kharisov, Ana Arizmendi-Morquecho, Anais Cario, Cyril Aymonier, Samuel Marre, Israel Lopez
Summary: A simple and low-cost continuous segmented-flow process for the synthesis of Ag and Au spherical-shaped nanoparticles is presented. The flow conditions have opposite effects on the synthesis of Ag and Au nanoparticles, with low residence times improving Ag nanoparticle production and high residence times improving Au nanoparticle synthesis yield and quality.
IEEE TRANSACTIONS ON NANOBIOSCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Manuel Ceballos, Israel Lopez, Ana Arizmendi-Morquecho, Margarita Sanchez-Dominguez
Summary: In this study, a simple, fast, reproducible and cheap methodology for SERS substrate fabrication of decorated silver dendritic nanostructures with gold nanospheres was reported. The decorated nanostructures showed improved sensitivity for detecting the analyte at low concentrations. The results demonstrated that the decorated nanostructures exhibited significantly enhanced Raman signals at low concentrations.
Article
Materials Science, Multidisciplinary
Ricardo Ortega-Alvarez, Maria T. Hernandez-Sierra, Luis D. Aguilera-Camacho, Micael G. Bravo-Sanchez, Karla J. Moreno, J. Santos Garcia-Miranda
Summary: This study analyzes the improvement of steel bearing system performance using green lubricants based on vegetable oil mixtures. The results show that oil mixtures can significantly reduce the friction coefficient and wear rate, making them a feasible option for biolubricants in bearing systems.
Article
Primary Health Care
Isidro Garcia-Salvador, Encarna Chisbert-Alapont, Amparo Antonaya Campos, Jorge Casana Mohedo, Clara Hurtado Navarro, Silvia Fernandez Peris, Jose Bonias Lopez, Maria Luisa de la Rica Escuin
Summary: This study assessed the training, readiness, and training needs of primary care nurses in Spain in palliative care theory and practice through a descriptive cross-sectional study. The results indicated a deficiency in practical training in palliative care, highlighting the need for targeted training to improve the care of people with palliative needs and their families.
Article
Engineering, Mechanical
J. E. Gonzalez-Sevilla, J. O. Berumen, M. Flores-Martinez, L. Rivera, E. Camps, C. Hernandez-Navarro, E. Rodriguez-De Anda, E. Garcia
Summary: The tribological performance of coatings is influenced by their material, morphology, and structure. This study compared the performance of two multilayer films with different thickness arrangements and found that the hierarchical structure reduced the presence of cracks and fractures.
Article
Engineering, Chemical
Jesus Alonso Cruz-Valdez, Rosalba Patino-Herrera, Guillermo Gonzalez-Alatorre, Jose Francisco Louvier-Hernandez, Adriana Aviles Martinez, Elias Perez
Summary: This study investigated a method of separating propylene from propane using ACN-EDA solvent in extractive distillation process, and the results showed that this method can reduce costs and CO2 emissions.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Manuel Ceballos, Israel Lopez, Ana Arizmendi-Morquecho, Margarita Sanchez-Dominguez
Summary: In this work, a simple, fast, reproducible and cheap method for fabricating surface enhanced Raman spectroscopy substrates was reported. Silver dendritic nanostructures prepared by electrodeposition were decorated with gold nanospheres using electrophoretic deposition. The decorated nanostructures showed improved sensitivity in detecting analytes at lower concentrations.
Article
Agriculture, Dairy & Animal Science
Fernando Jonathan Lona-Ramirez, Nancy Lizeth Hernandez-Lopez, Guillermo Gonzalez-Alatorre, Teresa del Carmen Flores-Flores, Rosalba Patino-Herrera, Jose Francisco Louvier-Hernandez
Summary: In recent years, oregano essential oil has been used as an animal food additive due to its antifungal and antibacterial properties as well as a synthetic antibiotic substitute. This study compares the performance of Soxhlet solvent extraction and head space-solid phase microextraction (HS-SPME) techniques for quantification of thymol and carvacrol in a swine feed organic matrix. The HS-SPME method is found to be more efficient for extracting these compounds.
REVISTA MEXICANA DE CIENCIAS PECUARIAS
(2023)
Article
Materials Science, Multidisciplinary
M. Edith Navarro-Segura, Ruben Dario Rivera-Rangel, Ana Arizmendi-Morquecho, Israel Lopez, J. Alvarez-Quintana, Margarita Sanchez-Dominguez
Summary: In this study, a highly sensitive and reusable plasmonic nanostructure substrate was developed using a facile and low-cost method. The substrate exhibits high spatial resolution and is capable of detecting high-resolution SERS spectra at very low solution concentrations. The results were confirmed using the discrete dipole approximation and Mie's theory, and finite element modeling demonstrated the superior surface electric field detection performance of hollow structures compared to solid structures.
APPLIED MATERIALS TODAY
(2022)
Article
Environmental Sciences
Carolina Hernandez-Navarro, Sebastian Perez, Elizabeth Florez, Nancy Acelas, Juan Munoz-Saldana
Summary: Currently, the large volumes of Sargassum biomass (Sgs) arriving on Caribbean coasts are a problem that must be solved quickly. One alternative is to obtain value-added products from Sgs. In this work, Sgs is demonstrated to be a high-performance Ca -bioadsorbent for phosphate removal by a heat pretreatment at 800 degrees C that produces biochar. The calcined Sgs (CSgs) have a composition of 43.68%, 40.51%, and 8.69% of Ca (OH)2, CaCO3, and CaO, making CSgs a promising material for phosphate removal and recovery.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Materials Science, Coatings & Films
A. I. Gutierrez-Perez, M. T. Ayala-Ayala, A. G. Mora-Garcia, C. Hernandez-Navarro, S. Perez, J. A. Diaz-Real, J. Gonzalez Hernandez, J. Munoz-Saldana
Summary: Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have shown potential in environmental remediation. This study investigates the photocatalytic properties of NBT-based coatings deposited by oxyacetylene flame spray (FS) and analyzes the influence of spraying parameters on the physicochemical properties. The results demonstrate the ability of the FS methodology to produce multiphase photocatalytic coatings.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2023)
Article
Chemistry, Applied
M. Edith Navarro-Segura, Margarita Sanchez-Dominguez, Ana Arizmendi-Morquecho, J. Alvarez-Quintana
Summary: This study demonstrates the fabrication of enhanced performance TENGs using Ag octahedron nano-assemblies on ITO as electrodes, which significantly increases the electric charge collection. As a result, the nanostructured TENG exhibits a 65 times higher maximum output power and nearly 10 times higher open circuit output voltage than the non-nanostructured TENG, attributed to the increment of intrinsic interface states and effective contact area. It is also shown that the resulting electrical output power can successfully drive low power consumption electronic devices, contributing to the development of TENG technology.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
M. I. Martinez-Valencia, Carolina Hernandez Navarro, J. A. Vazquez-Lopez, J. L. Hernandez-Arellano, J. A. Jimenez-Garcia, J. L. Diaz-Leon
Summary: This study presents the optimization of cranial titanium implants using Finite Element Analysis (FEA) and artificial neural network (ANN), which is of significant importance for repairing skull injuries.
REVISTA INTERNACIONAL DE METODOS NUMERICOS PARA CALCULO Y DISENO EN INGENIERIA
(2022)
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.
