Article
Materials Science, Composites
Sohail Yasin, Munir Hussain, Qiang Zheng, Yihu Song
Summary: In this study, natural rubber nanocomposites were prepared using novel fillers and modifiers. Both the fillers and ionic liquid improved the mechanical properties of the material without affecting the dispersion of the nanoparticles during processing.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Paper & Wood
Jaehyun Jung, Henry A. Sodano
Summary: Cellulose nanocrystals (CNCs) are modified and bonded to aramid nanofibers (ANFs) to form hybrid fillers, which are then functionalized using a silane coupling agent and incorporated into rubber compounds. The functionalized ANF/CNC (fAC) reinforced rubber compounds show improved mechanical properties, crosslink density, abrasion resistance, and fuel-saving efficiency without compromising wet skid resistance performance.
Article
Materials Science, Multidisciplinary
Jia Xin Chan, Joon Fatt Wong, Azman Hassan, Norhayani Othman, Jeefferie Abd Razak, Umar Nirmal, Shahrir Hashim, Yern Chee Ching, Muhamad Zaini Yunos, T. M. Sampath U. Gunathilake
Summary: Polybutylene terephthalate (PBT) hybrid nanocomposites reinforced with synthetic wollastonite nano-fibers (SWN) and graphene oxide (GO) were prepared by melt compounding. The study investigated the effect of GO content on the properties of PBT/SWN/GO nanocomposites. The hybridization of SWN and GO improved the mechanical, thermal, and tribological properties, but the poor interaction between GO and PBT matrix limited the reinforcing effect of SWN.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Sohail Yasin, Munir Hussain, Qiang Zheng, Yihu Song
Summary: This study investigates the potential of using cellulose nanocrystals as biodegradable nanofillers in rubber nanocomposites and conducts a life cycle assessment. The results show that partially replacing carbon black or silica with cellulose nanocrystals can enhance the biodegradability of the composites, thereby reducing waste generation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Haijie Chen, Zhiwen Zheng, Hongxiang Yu, Dan Qiao, Dapeng Feng, Zenghong Song, Jian Zhang
Summary: Solid lubricants are attracting attention for their use in special working conditions, and MXenes have become popular due to their nanolaminated structure and weak interactions. The MXene-based films modified with polydopamine showed significantly enhanced tribological performance and load capacity, with Si-MX/PDA-HOAC performing the best. A lubricating protection film containing FeF2 formed on the silicon/steel surfaces played a key role in demonstrating excellent tribological properties in this study.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Amir Saeid Pakdel, Elina Niinivaara, Emily D. Cranston, Richard M. Berry, Marc A. Dube
Summary: Cellulose nanocrystals (CNCs) with different surface properties were incorporated into emulsion-based pressure-sensitive adhesives (PSAs) to modify their properties. CNCs with higher hydrophilicity and surface charge showed less association with latex particles and resulted in nanocomposites with lower strain-softening behavior and improved PSA properties.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Pampayil Sasikumar Sarath, David Pahovnik, Petra Utrosa, Ozgun Can Onder, Sabu Thomas, Jozef T. Haponiuk, Soney C. George
Summary: This study investigates the influence of hybrid nanofillers on the properties of silicone rubber nanocomposites. The results show that better dispersion of graphene oxide improves the mechanical properties and reduces the friction coefficient of the material. Additionally, graphene oxide can form a lubricant layer, leading to a smoother material surface. The study also explores the solvent transport and the factors affecting it, such as solvent structure and filler concentration.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Cailean Q. Pritchard, George Funk, James Owens, Samantha Stutz, Ali Gooneie, Janak Sapkota, E. Johan Foster, Michael J. Bortner
Summary: A novel nanocomposite comprised of cellulose nanocrystals and oxidized cellulose nanofibers was prepared through solution casting, and the combination of these materials can be used to develop nanocomposites with enhanced mechanical properties.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Applied
Ziyang Chen, Zikang Li, Ping Lan, Hui Xu, Ning Lin
Summary: Inspired by ancient Chinese philosophy, we combined rigid cellulose nanocrystals (CNC) with elastic rubbers to create CNC/rubber composite aerogels, which exhibit low density, high porosity, improved mechanical performance, and hydrophobicity.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Xiaoping Yang, Jianfeng Tian, Jun Dong
Summary: By adding n-CuO, the friction mechanism of fluorosilicone rubber is changed, resulting in reduced friction coefficient and wear loss, enhancing the friction properties of the rubber matrix. Additionally, the tearing property of FVMQ is improved by altering the crosslinking density with the addition of n-CuO.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Ge Zhu, Laura Giraldo Isaza, Alain Dufresne
Summary: A green and powerful strategy for preparing CNC/GO/NR nanocomposites with a 3D hierarchical conductive network was reported. The CNC/GO nanohybrids, with enhanced stability due to hydrogen bonding interactions, significantly improved electrical conductivity and mechanical properties of the nanocomposites. The nanocomposite with 4 wt% GO and 5 wt% CNC exhibited a nine orders of magnitude increase in electrical conductivity compared to the nanocomposite with only 4 wt% GO.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Jose M. Lineira del Rio, Ramon Rial, Enriqueta R. Lopez, Josefa Fernandez
Summary: This research investigates the use of Mn3O4-graphene nanocomposites as additives in electric vehicle transmission oils. The results show that adding Mn3O4-G nanoparticles can effectively reduce friction and wear, with the nanolubricant containing 0.075 wt% Mn3O4-G exhibiting the best performance.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Hyeonho Cho, Ahmad Shakil, Andreas A. Polycarpou, Sunghan Kim
Summary: In this study, a new type of bionanofilm was successfully developed through water vapor annealing, using graphene oxide, silk fibroin, and cellulose nanocrystals. The mechanical properties of the film were altered only in the in-plane direction after annealing, while remaining unchanged in the thickness direction.
Article
Polymer Science
Xiao Xiao, Jie Chen, Zhe Ling, Jiaqi Guo, Jianbin Huang, Jianfeng Ma, Zhi Jin
Summary: The study focuses on the preparation of chiral nematic cellulose nanocrystal films by self-assembly, incorporating amino acids to tune optical properties. Among the four types of amino acids tested, serine showed the most compatible intercalation. The composite films of histidine and phenylalanine exhibited multi-optical functions with high UV light shielding capabilities, indicating potential for diverse applications in functional materials.
Article
Engineering, Mechanical
Rundong Zuo, Guorong Wang, Gang Hu, Shiping Zhao, Gang Wei
Summary: The study investigated the influence of different axial loads on the tribological properties of HNBR in oil-based mud containing hard particles using experimental and theoretical methods. It was found that the tribological properties of HNBR vary with axial load and wear time, and the total friction coefficient can be separated into adhesion, hysteresis, and abrasive terms. The hysteresis term, caused by micro-strain on the HNBR surface and overall deformation, was identified as the main factor affecting the tribological properties.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Composites
Yunxiao Liu, Lijuan Zhou, Li Wang, Xiaolong Pan, Kuntao Wang, Jie Shu, Lehuan Liu, Hui Zhang, Leyu Lin, Xinyan Shi, Alois K. Schlarb, Jianming Zhang
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Mechanical
Sebastian Kamerling, Alois K. Schlarb
TRIBOLOGY INTERNATIONAL
(2020)
Article
Thermodynamics
Johannes Hoeller, Jan Niedermeyer, Claudia Redenbach, Nicholas Ecke, Alois K. Schlarb, Heiko Andrae, Peter Klein
HEAT AND MASS TRANSFER
(2020)
Article
Engineering, Mechanical
Leyu Lin, Chong Sun, Stefan Emrich, Michael Kopnarski, Alois K. Schlarb
Article
Polymer Science
Yang Lyu, Haotian Zhao, Xinlong Wen, Leyu Lin, Alois K. Schlarb, Xinyan Shi
Summary: Developing high-performance biodegradable materials using 3D printing is crucial for environmental protection and addressing emergencies like COVID-19. Fused deposition modeling (FDM) has advantages such as low cost, but weak interlayer adhesion restricts its development. By optimizing 3D printing parameters, significant improvements in interlayer adhesion and mechanical properties of FDM products can be achieved, offering a new approach for enhancing FDM performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Leyu Lin, Alois K. Schlarb
Summary: The study found that the content of silica nanoparticles significantly affects the friction and wear properties of PEEK/CF/nanosilica composites. Under low-load conditions, the friction coefficient decreases with increasing nanofiller content, while the specific wear rate increases with enhancing nanosilica loading. However, under high-load conditions, the differences in tribological properties become insignificant, showing less dependence on nanosilica loading.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Materials Science, Composites
Alois K. Schlarb, Nicholas Ecke, Sebastian Kamerling, Yuxiao Zhao, Leyu Lin
Summary: This paper presents a comparative evaluation of the tribological properties of five polyetheretherketone compounds in sliding contact with steel. The study reveals that the best tribological properties can be achieved by adding a wide variety of inorganic fillers, in addition to carbon fibers and solid lubricants.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Yang Lyu, Xinlong Wen, Gongliang Wang, Qinghong Zhang, Leyu Lin, Alois K. Schlarb, Xinyan Shi
Summary: This study improved the mechanical properties of composite materials by coating low molecular weight poly (D-lactic acid) on the surface of silica dioxide using a green chemical method, achieving nano dispersion and uniform distribution.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Characterization & Testing
Yang Lyu, Yanlu Chen, Leyu Lin, Alois K. Schlarb, Yue Li, Xinyan Shi
Summary: This study successfully increased the filament layer adhesion strength of FDM specimens by using a polymer blend as the matrix and adding a low molecular weight plasticizer and crosslinking agent.
Article
Engineering, Mechanical
Leyu Lin, Stefan Emrich, Michael Kopnarski, Alois K. Schlarb
Summary: This study systematically investigated the lubrication performance of a PEEK/PTFE blend in a steel/steel tribosystem under dry sliding conditions. It was found that the lubrication effect is strongly dependent on the provisioning rate, with a significant drop in friction coefficient at steel/steel contact when the rate is between 3 and 5 ng/mm2.rev, resulting in a constant level of around 0.3. The improved tribological properties were attributed to the higher specific lubricant film thickness, suggesting a novel approach for lubricating steel/steel contact using polymer-based solid lubricants.
Article
Chemistry, Physical
Tobias Bubmann, Simon Shi, Alexander Brueckner, Teresa Menzel, Holger Ruckdaeschel, Alois K. Schlarb, Volker Altstaedt
Summary: Environmental stress cracking (ESC) is a common failure mechanism for polymer components, and its impact on the long-term stability of plastics in outdoor applications is of great importance. This study investigated the influence of different sample wetting methods on ESC behavior and revealed significant differences in crack propagation behavior depending on the wetting method. Correlations between wetting behavior, crack propagation behavior, and morphological phenomena were established.
Article
Green & Sustainable Science & Technology
Leyu Lin, Yuxiao Zhao, Yao Xu, Chong Sun, Alois K. Schlarb
Summary: In this study, high-performance tribocomposites were manufactured using recycled carbon fibers, and it was demonstrated that recycled carbon fibers can be excellent candidates for preparing high-quality tribomaterials.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Chemistry, Physical
Chi Hua, Shengqin Zhao, Leyu Lin, Alois K. Schlarb
Summary: The impact of loading history on the friction and wear behavior of a PESU-based nanocomposite/steel tribosystem was investigated in this study. Surprisingly, the steel counterpart, which was expected to be stronger, also experienced wear when the load conditions exceeded a critical load limit, resulting in significantly higher wear of the nanocomposite during subsequent sliding. Analysis of the worn surfaces of the steel confirmed the occurrence of tribochemical reactions during sliding, attributed to the redox between sulfur dioxide (SO2) decomposed from PESU and the iron of the metallic counterbody. These reactions led to pronounced changes of the steel surface and subsequent high wear.
APPLIED SURFACE SCIENCE
(2023)
Article
Polymer Science
Simon Shi, Leyu Lin
Summary: The present study comprehensively investigated the environmental stress cracking resistance (ESCR) of a vibration-welded polycarbonate (PC) nanocomposite filled with 1 vol.-% nanosilica using an online optical crack measurement approach. The experimental results showed that the improvement of ESCR depended strongly on the stress cracking agents (SCAs) used. Addition of nanosilica led to a significant increase in the ESCR of neat PC in deionized water, while the enhancement in isopropanol after incorporating nanosilica was marginal. The observed improvement was attributed to the plastic deformations and micro cavities induced by the nano-sized particles during fracture of the materials, as elucidated through optical analysis.
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.