Article
Polymer Science
Gulsum Ceylan, Serkan Emik, Tuncer Yalcinyuva, Emin Sunbuloglu, Ergun Bozdag, Fatma Unalan
Summary: This study investigated the effects of different cross-linking agents with varying chain lengths and flexibilities on the mechanical properties of PMMA. The results showed that there was no significant increase in flexural strength, elastic modulus, or impact strength with the addition of cross-linking agents. However, the surface hardness of PMMA notably decreased with the addition of PEGDMA in concentrations ranging from 5% to 20%. The incorporation of cross-linking agents in concentrations ranging from 5% to 15% led to an improvement in the mechanical properties of PMMA.
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
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
Eun-Hee Kim, In-Hwa Choi, Kwang-Hwan Ko, Joon-Seop Kim
Summary: The effects of cation type and under-neutralization on the scratch healing of poly(methyl methacrylate-co-methacrylate) ionomers by heat treatment were investigated. The study found that within the tested time frame, regardless of the cation type of the neutralizing agents or the degree of under-neutralization, the ionomers exhibited a healing efficiency of 84-98%.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Physical
ShiWei Xie, Dong Wang, Sa Zhang, JianHua Xu, JiaJun Fu
Summary: This article describes a catalyst-free and efficient method for preparing high performance PMMA through hindered urea bond (HUB) crosslinking strategies. The HUB crosslinked PMMA exhibits improved mechanical properties, including increased Young's modulus, tensile strength, strain at break, and toughness. It also shows excellent solvent resistance, high temperature creep resistance, and the ability to be recycled and repaired.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Thermodynamics
Jianying Ma, Chunlei Cao
Summary: Ionic liquids (ILs) have been widely used as solvents for organic synthesis, but their applications in polymer synthesis are still limited. This study investigates the use of ILs in copolymerization and shows that copolymerizing ILs can significantly improve the thermal stability of copolymers. The results indicate that copolymers with ILs have higher thermal stability and thermal oxidative stability compared to homopolymers.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Ming-Hung Tsai, Hao Ouyang, Fuqian Yang, Mao-Kuo Wei, Sanboh Lee
Summary: Understanding the structural degradation of polymers and polymer-based materials is crucial for improving the reliability and lifespan of associated structures and systems. In this study, we investigated the effect of UV irradiation on the physical aging of PLA and PMMA blends using differential scanning calorimetry. The results revealed the thermodynamic and kinetic contributions to the aging process and the decrease in enthalpy loss and activation energy with increasing UV irradiation dose.
Article
Nanoscience & Nanotechnology
Qingxiang Wu, Zunpeng Feng, Ziming Cai, Chuwen Lan, Jianchun Xu, Ke Bi, Yanan Hao
Summary: To improve the energy storage density of capacitors, the ferroelectric phase poly(vinylidene fluoride) (PVDF) is introduced as a modifier. Blending PVDF-doped PMMA composites enhances the polarization strength but sacrifices the breakdown strength due to the presence of defects. To address this issue, a double-layer structure is designed with controlled interfacial bonding achieved through hot pressing. This work successfully achieves high discharge energy density and maintains energy efficiency in PMMA and PVDF composite films.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
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
Polymer Science
Ioana Chiulan, Denis Mihaela Panaitescu, Andrada Serafim, Elena Ruxandra Radu, Gabriela Ionita, Valentin Raditoiu, Augusta Raluca Gabor, Cristian-Andi Nicolae, Marius Ghiurea, Dora Domnica Baciu
Summary: In this study, cellulose nanofibers were surface treated by plasma and grafted with poly(ethylene glycol)methyl ether methacrylate (PEGMMA) to improve their mechanical strength and hydrophobicity. The results showed that the plasma treatment and PEGMMA grafting significantly improved the surface characteristics of the nanofiber sponges, increasing their wall thickness and number of pores, and enhancing their hydrophobicity and mechanical strength. Cell viability experiments demonstrated that the PEGMMA-grafted nanofiber sponges had higher cell viability and did not trigger an inflammatory response. These findings suggest the great potential of plasma-treated and PEGMMA-grafted cellulose nanofibers for biomedical applications.
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
Materials Science, Multidisciplinary
Kung-Tse Yang, Ya-Chen Yuan, Hao Ouyang, Fuqian Yang, Sanboh Lee
Summary: Understanding the impact of solvent-induced crack growth in polymer composites is crucial for their practical applications. In this study, the researchers investigated the crack growth in poly (methyl methacrylate)/multiwalled carbon nanotube (PMMA/MWCNT) composites under different solvent and temperature conditions. They found that the type of solvent and temperature significantly affected the areal density and growth rate of cracks, and increasing the fraction of MWCNTs reduced crack growth. The crack growth was controlled by a thermally activated process, with faster growth observed in the healed area compared to the non-cracked area.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Chemical
Sheng-Yao Wang, Ralph Rolly Gonzales, Pengfei Zhang, Titik Istirokhatun, Ryosuke Takagi, Airi Motoyama, Li-Feng Fang, Hideto Matsuyama
Summary: A new P(MMA-co-DMAEMA)based membrane was fabricated and modified to control surface charge for improved fouling resistance. The modified membrane exhibited outstanding antibacterial activity and fouling resistance against model protein foulants, showing enhanced surface hydrophilicity and positive surface charge due to the incorporation of P(MMA-co-DMAEMA) and quaternization process. The neutralized blend membrane showed excellent anti-bacterial activity, comprehensive resistance against charged foulants, and high flux retention after simple membrane washing, demonstrating potential for practical filtration applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Polymer Science
Ismael Sanchez-Calderon, Victoria Bernardo, Daniel Cuadra-Rodriguez, Judith Martin-de-Leon, Miguel Angel Rodriguez-Perez
Summary: Micronization is a promising route to reduce the thermal conductivity of nanocellular polymers by replacing the continuous solid phase with a discontinuous one, resulting in improved performance.
Article
Polymer Science
Pelin Ozzaim, Orkan Baran Korkusuz, Sinan Fidan, Tamer Sinmazcelik
Summary: Polymer materials with high specific strength are extensively used in engineering applications. Poly (methyl methacrylate) (PMMA), a thermoplastic material with high glass transition temperature, is widely used due to its low density, lightweight, high transparency, chemical resistance, and high toughness. Recent studies on the scratching behavior of polymers show that the behavior varies significantly under different operating conditions.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Shuai Liu, Sheng Wang, Shouhu Xuan, Shuaishuai Zhang, Xiwen Fan, Han Jiang, Pingan Song, Xinglong Gong
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Engineering, Multidisciplinary
Shuaishuai Zhang, Sheng Wang, Tao Hu, Shouhu Xuan, Han Jiang, Xinglong Gong
COMPOSITES PART B-ENGINEERING
(2020)
Article
Engineering, Mechanical
Chengkai Jiang, Zhongmeng Zhu, Jianwei Zhang, Zhuoran Yang, Han Jiang
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Mechanics
Zhuoran Yang, Jianwei Zhang, Zhongmeng Zhu, Chengkai Jiang, Qian Cheng, Han Jiang
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2020)
Article
Polymer Science
Ke Chen, Chaoming Wang, Tingjun Wang, Zhongmeng Zhu, Ruiting Ma, Han Jiang
JOURNAL OF POLYMER RESEARCH
(2020)
Article
Engineering, Mechanical
Qian Cheng, Han Jiang, Yonghua Li
TRIBOLOGY INTERNATIONAL
(2020)
Article
Mechanics
Zhongmeng Zhu, Yan Xia, Chengkai Jiang, Zhuoran Yang, Han Jiang
Summary: The study investigated the zero-degree peeling behavior of highly stretchable adhesive tape on a rigid substrate and proposed analytical formulas to consider the influences of viscoelasticity, hyperelasticity, and visco-hyperelasticity on peeling performance. The research found that the instant peeling force of viscoelastic tape can be greatly improved through a rate-dependent coefficient, the Neo-Hookean type of hyperelasticity enhances interfacial stability, and visco-hyperelasticity may bring a risk of delayed debonding. Guidance for innovative designs of visco-hyperelastic tape bonding systems was also discussed.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Haitao Liu, Jianwei Zhang, Minghao Zhao, Chunsheng Lu
Summary: Fracture toughness is an important index in safety evaluation for materials and structures. A new formula based on scratch tests with a Vickers indenter has been proposed in this work to determine the fracture toughness of glasses, which takes into account parameters such as elastic modulus, crack depth, and applied normal force. This alternative method provides a convenient and accurate way to calculate the fracture toughness of glass materials.
ACTA MECHANICA SOLIDA SINICA
(2022)
Article
Automation & Control Systems
BingBing Wang, HaiKuan Chen, GuangTao Xu, JianWei Zhang, MingHao Zhao
Summary: This paper proposes a theoretical model for predicting the surface morphology of inhomogeneous target materials, and its advantages are demonstrated through experiments.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Physics, Applied
Siwei Zhao, Jianwei Zhang, Yuanxin Li, Haitao Liu, Bingbing Wang, Minghao Zhao
Summary: This article proposes a method to solve the inverse problem of characterizing mechanical properties of bilayer materials using finite element simulation. The method can determine the film thickness, Young's modulus, and hardness of film and substrate. It has practical prospects in the field of indentation testing technology.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Mechanical
Jianwei Zhang, Yuanxin Li, Xuefeng Zheng, Gang Wang, Minghao Zhao
Summary: A new test method based on dimensional analysis and finite element analysis was proposed to extract plastic parameters and interfacial coefficient of friction of metallic materials via scratch tests. The proposed formulas were proven to be accurate through comparison with conventional methods.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Electrical & Electronic
Xiaohui Liu, Rui Huang, Chengkai Jiang, Yu Xu, Chun Li, Chuan Wu
Summary: This paper systematically studied the dynamic response and fatigue life of tension insulator strings under stochastic wind. The finite element models were established to analyze the effects of height difference ratios on conductors' dynamic tension and insulator strings' dynamic response. A simplified calculation method of stress time history was proposed to evaluate the fatigue life. The results revealed at-risk parts and failure modes, providing guidance for optimization and safety evaluation of fittings.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Materials Science, Multidisciplinary
Jianwei Zhang, Jinhong Qin, Yuanxin Li, Chunsheng Lu, Haitao Liu, Minghao Zhao
Summary: This paper utilizes neural networks and deep learning methods to extract plastic parameters of metallic materials from scratch tests, establishing the relationship between scratch responses and plastic parameters using various network models, with the DMTR model outperforming the other two.
MECHANICS OF MATERIALS
(2022)
Review
Mechanics
Zhuoran Yang, Yan Xia, Zhongmeng Zhu, Chengbin Yao, Han Jiang
Summary: This paper systematically reviews the methodology of developing the cohesive zone model (CZM) for understanding the failure behavior of soft adhesives. The establishment of CZM for one-time failure, delayed failure, and fatigue failure of soft adhesives is summarized. The challenges and prospects for future research are presented based on the application of soft adhesives in frontier areas.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)
