Article
Polymer Science
Ying Yan, Yujia Sun, Jiyang Su, Bo Li, Ping Zhou
Summary: Polymer crazing is a precursor to damage and significantly reduces the mechanical performance of polymer materials. This study examined the initiation and progression of crazing in PMMA, and the impact of machining and alcohol solvents on its formation. The results showed that alcohol solvents influenced PMMA through physical diffusion, while machining affected crazing growth via residual stress. Treatment reduced the crazing stress threshold and increased sensitivity to stress. Oriented PMMA exhibited higher resistance to crazing stress compared to regular PMMA. This study provides valuable insight into crazing initiation and prevention methods.
Article
Chemistry, Multidisciplinary
Lidia Mezzina, Angelo Nicosia, Giuseppe Antonio Baratta, Maria Elisabetta Palumbo, Carlotta Scire, Placido Giuseppe Mineo
Summary: As space exploration missions become more frequent, the effects of space radiation on polymers, which are versatile and suitable for advanced applications, are not yet fully understood.
Article
Chemistry, Physical
Bingkun Chen, Qianwen Zhang, Xiong Shen, Dayu Huang, Chenggang Yuan, Yuting Wang, Qiuyun Ouyang, Xuan Fang, Xue Chen
Summary: The MAPbBr3 perovskite and MAPbBr3/PMMA organic glasses were successfully synthesized, showing excellent optical properties. The nonlinear absorption coefficient of MAPbBr3/PMMA is competitive with perovskite materials, and its stability over time proves its potential for future optical limiting devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Biochemistry & Molecular Biology
Mairis Iesalnieks, Raivis Eglitis, Talis Juhna, Krisjanis Smits, Andris Sutka
Summary: This study successfully prepared a transparent titanium dioxide coating on plastic substrates and demonstrated its high performance in photocatalytic degradation of organic pollutants. The coating can be applied to polymer substrates and exhibits good stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Dhiraj Dutta, Nisha Gaur, Rama Dubey, Jitendra Yadav, Jyoti Prasad Borah, Amrit Puzari
Summary: Novel materials with low density, such as hollow poly methyl methacrylate microspheres coated with functionalized carbon nanotubes, have been synthesized successfully and shown to effectively remove turbidity from surface water. The surface coating with f-CNTs, high regeneration efficiency, and potential for multiple applications make these materials promising for water purification systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Physics, Applied
S. M. Torres, O. Y. Vorobiev, R. E. Robey, M. J. Hargather
Summary: This study investigates the fracture response of geologic materials under explosive loading using a transparent rock surrogate, PMMA. High-speed imaging and PDV were used to capture the shock propagation and fracture growth processes. The experimental results were compared to numerical simulations, showing good agreement in fracture lengths. The simulation analysis revealed that the shock drives the fracture for approximately 20 μs.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Wenping Kang, Yu Bao, Hailong Wang, Nanpu Cao, Shuxun Cui
Summary: Polymethyl methacrylate (PMMA), a material widely used in medicine and engineering, possesses contradictory properties of good hydrophilicity and water insolubility. By studying the interactions between PMMA and water using atomic force microscopy (AFM)-based single-molecule force spectroscopy (SMFS), it has been found that PMMA can form hydrogen bonds with water molecules, affecting its elasticity and hydration. These findings provide insights into the mechanism of PMMA-water interactions at the molecular level, aiding in the regulation of PMMA's mechanical properties.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Fatma Meydaneri Tezel, Ishak Afsin Kariper, Dilek Kaan, Dilek Bahar
Summary: In this study, I2/PMMA and CuS/I2/PMMA thin films were prepared using Chemical Bath Deposition (CBD) method on PMMA substrates, and their physicochemical and antimicrobial properties were analyzed. The film's surface tensions, thicknesses, surface roughnesses, and antimicrobial performance were significantly improved.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
A. L. Rangel-Cardenas, S. J. Picken, G. J. M. Koper
Summary: The role of interfacial resistance to water transport in a system geometry similar to a PEM fuel cell was investigated in this study. Water sorption kinetics in carbon-supported Nafion thin-films was studied at different relative humidities and membrane thicknesses. Anomalous water sorption kinetics were observed, characterized by a delayed onset to Fickian behavior and two different time scales. The presence of two regimes with different diffusion coefficients, attributed to interfacial and bulk diffusivities, can simulate the anomalous behavior in sorption curves.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Tulika Sharma, Masaaki Konishi, Kazuki Sekiya, Isao Takahashi
Summary: This study examined the relaxation of ultrathin PMMA films on SiO2 and SiOH substrates with varying thicknesses. It revealed complex thickness variations over time, which were attributed to the interaction between the substrate and out-of-equilibrium polymer configurations in a quasi-2-D geometry.
Article
Engineering, Chemical
Nursyahirah Mohd Shatar, Mohd Faizul Mohd Sabri, Mohd Faiz Mohd Salleh, Mohd Hanafi Ani, Xitong Xie, Arnaud Weck
Summary: The decline in freshwater availability has led to research on solar desalination technology. This paper introduces the use of femtosecond laser texturing to create a porous surface on the PMMA cover of a solar still, resulting in improved filmwise condensation. The modified surface enhances the productivity of the solar still and remains stable after repeated exposure to water vapour.
Article
Polymer Science
Lin Xu, Tong-Fei Shi, Li-Jia An, Yu-Yuan Lu, Li-Na Wang
Summary: The study systematically investigates the stability of thin polymer films in solvent-induced process and finds that aging temperature and film thickness strongly influence their stability. Physical aging and interfacial effects are crucial in stabilizing thin polymer films.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Applied
Yangyang Li, Shengnan Wang, Guangchen Zhang, Xiulin Liu, He Liu, Danshi Zhu
Summary: This study prepared xerogels from soybean protein isolate (SPI) and soybean soluble polysaccharides (SSPS) and found that they could change from flat sheets to curled sheets during hydration. The effect of SSPS concentration on the deformation of the xerogels during hydration was investigated, and it was found that xerogels prepared with 3% SSPS had the greatest strength. The interactions between SPI and SSPS were mainly through hydrogen bonding and electrostatic interactions. The presence of 3% SSPS increased the content of bound water in xerogels and improved their thermal stability, while excessive SSPS content decreased the thermal stability of the xerogels.
FOOD HYDROCOLLOIDS
(2022)
Article
Materials Science, Multidisciplinary
Pranjali G. Yedewar, Sandip M. Wadhai, Yogesh B. Sawane, Arun G. Banpurkar
Summary: In this study, electrowetting on a bilayer dielectric stack (BDS) made from PMMA and fluoropolymer was investigated. The effective capacitance of the BDS was found to be inversely proportional to the layer thickness. The BDS showed consistent electrowetting response on different surfaces with varied PMMA layer thickness, and was successfully used to manipulate the oil-liquid interface on a liquid lens.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Environmental
Yiping Wen, Zhengfeng Xie, Songsong Xue, Wei Li, Hao Ye, Wei Shi, Yucheng Liu
Summary: In this study, a novel adsorption material called GSA was prepared by condensation between polyhydrazide and dialdehyde guar gum. GSA showed a porous structure and higher selectivity for cationic pollutants, making it suitable for the removal of dyes and heavy metal ions from wastewater. GSA also demonstrated efficient water/oil separation in various salt concentrations.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Yufan Cao, Xiangyu Wang, Huijing Yuan, Huiling Duan, Zhili Sun, Hongyuan Li, Pengyu Lv
Summary: This paper proposes a new method based on window deformation to estimate the velocity profile of near-wall flows, and further improves accuracy and reduces computational cost through a multi-pixel ensemble correlation method. The methods are validated through synthetic particle images and experiments.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhihua Liang, Miao Chen, Xin Yi, Wenpeng Zhu
Summary: In this study, the growth mechanism of giant unilamellar vesicles (GUVs) in electroformation was revealed through theoretical modeling and experimental methods. By introducing free boundaries on lipid films, it was possible to reduce the membrane tension and the coupling between vesicles, resulting in the preparation of detachable GUVs with controllable sizes. The construction of island-like lipid patches on electrodes enabled the size modulation of detachable GUVs.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Guo-Qing Chen, Hongyuan Li, Pengyu Lv, Huiling Duan
Summary: This paper introduces a phase interface compression term into the multiphase lattice Boltzmann flux solver, achieving excellent interface maintenance. The compression term only operates in the interface region and is solved as the flux. The validation of the model through simulation of various problems confirms its validity and reliability.
Article
Multidisciplinary Sciences
Da Zou, Zeming Wu, Xin Yi, Yue Hui, Guangze Yang, Yun Liu, Tengjisi, Haofei Wang, Anastasia Brooks, Haolu Wang, Xin Liu, Zhi Ping Xu, Michael S. Roberts, Huajian Gao, Chun-Xia Zhao
Summary: Cell membrane-coated nanoparticles are a promising type of nanomaterials for immune evasion and targeted delivery. The preservation of membrane protein properties on these nanoparticles and their consequent interactions with biological systems are still largely unknown.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
Wenbin Liu, Yangyang Cheng, Haonan Sui, Jiaqi Fu, Huiling Duan
Summary: Intergranular fatigue crack nucleation has been found to frequently occur at high angle grain boundaries (HAGBs) but rarely at low angle GBs (LAGBs) during persistent slip band (PSB)-GB interactions. However, the understanding of the role of GB misorientation angles in GB fatigue cracking is limited. In this study, a theoretical framework based on the competition between dislocation transmission and GB cracking is established to investigate this phenomenon. The results show that HAGBs usually have higher resistance to dislocation transmissions, leading to more significant dislocation pile-up and stress concentration, which facilitates GB crack nucleation. The study also emphasizes the importance of GB fatigue damage accumulation and its association with PSB extrusion growth in promoting GB crack nucleation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Baorui Xu, Hongyuan Li, Xiaochao Liu, Yaolei Xiang, Pengyu Lv, Xiangkui Tan, Yaomin Zhao, Chao Sun, Huiling Duan
Summary: Investigating the effect of micro-grooves on drag reduction in Taylor-Couette flow, it was found that the micro-grooves reduce the torque and hence drag in wave vortex flow and modulated wavy vortices flow. However, in turbulent Taylor vortices flow, drag reduction diminishes and eventually turns into drag increase with increasing Reynolds number. Particle image velocimetry measurements revealed that the weakening of large-scale Taylor vortices leads to drag reduction, while roughness effect results in drag increase.
Article
Multidisciplinary Sciences
Chao Shi, Guijin Zou, Zeming Wu, Meng Wang, Xinyun Zhang, Huajian Gao, Xin Yi
Summary: Combining theoretical modeling and molecular dynamics simulations, the study investigates the packing of a flexible filament inside a vesicle and explores the effects of filament stiffness, size, and osmotic pressure on the vesicle morphology. The results reveal various morphological transitions and establish phase diagrams predicting shape and symmetry transitions. The organization of filaments or nanotube rings inside vesicles, liposomes, or cells is discussed, providing insights into cell shaping, cellular stability, and the design of artificial cells and biohybrid microrobots.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Feng Zhao, Wenbin Liu, Haonan Sui, Jiaqi Fu, Yangyang Cheng, Jingyu Zhang, Huiling Duan
Summary: In this work, a transformation kinetics model considering the effect of irradiation hardening, shear band evolution and the role of irradiation-induced voids is developed, and a crystal plasticity framework incorporating the newly developed model is established. The framework is capable of capturing the accelerated evolution of martensite volume fraction and simulating two post-irradiation phenomena observed in experiments. This study is one of the first attempts at theoretically modeling the deformation-induced martensitic transformation in irradiated materials, and has the potential to benefit the application of irradiation in tailoring the martensitic transformation behavior.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Chemistry, Physical
Hao Wang, Jingyu Zhang, Huashan Shang, Aixue Sha, Yangyang Cheng, Huiling Duan
Summary: In this study, room-temperature pre-tension experiments and subsequent creep tests were conducted on powder metallurgy Ni-based superalloy FGH96. It was found that increasing amounts of pre-strain led to progressive increases in steady-state creep rate and creep stain. The morphology and distribution of γ' precipitates were not significantly affected by pre-strain, but the dislocation density continuously increased with increasing pre-strains. The increase in the density of mobile dislocations introduced by pre-strain was the main reason for the increase in creep rate. The proposed creep model showed good agreement with experimental data and captured the pre-strain effect.
Article
Physics, Fluids & Plasmas
Songsong Ji, Hongyuan Li, Zengzhi Du, Pengyu Lv, Huiling Duan
Summary: In this study, a theoretical framework is established to solve the interfacial coupled flow problem on a microstructured surface with slip boundary. By finding integral relation between the slip velocity and the slip velocity gradient, we solve the slip problem under the low-Reynolds-number limit. It is found that a small viscosity ratio, large fluid interfacial fraction, or large depth-to-width ratio of a groove can result in a large vorticity flux in the groove, leading to a large slip length. Therefore, we propose a method to enhance the slippage by introducing a jet flow in the grooves, which is verified by our theory. This study provides a new method for theoretically solving the coupled flow problem and can be extended to cases of high-speed flow.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Materials Science, Multidisciplinary
Wenbin Liu, Feng Zhao, Long Yu, Yangyang Cheng, Huiling Duan
Summary: A constitutive framework involving microplasticity and macroplasticity was established to model the elastic-plastic transition of metallic materials. The significant role of microplasticity in cyclic softening behavior, especially in the irradiated case, was demonstrated. This framework provides a quantitative understanding of microplasticity in crystalline materials and has the potential to inform predictions of material damage and lifetime.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Marine
Kai Lv, Yongze Liu, Chenxi You, Yong Zou, Zeqi Shi, Pengyu Lv, Huiling Duan, Hongyuan Li
Summary: Due to the increasing demands in marine resource exploitation and marine defense security deployment, a cross-domain vehicle (CDV) with both high-speed mode as unmanned surface vehicles (USVs) and diving mode as autonomous underwater vehicles (AUVs) is proposed. The CDV utilizes well-tailored hydrofoils to reduce drag, allowing for high-speed cruising on the water surface. Numerical investigations and prototype tests demonstrate the technical feasibility of the CDV, with a maximum drag reduction of 43% and improved longitudinal stability through the elaborate design of the hydrofoils. Flow field analysis reveals the mechanisms behind drag reduction, including inhibition of wave-making and reduction of the wetted surface area.
Article
Mechanics
Guo-Qing Chen, Zengzhi Du, Hongyuan Li, Pengyu Lv, Huiling Duan
Summary: This paper numerically studies the effect of microstructures on flow separation and drag reduction. It is found that microstructures can reduce the motion amplitude of shed vortices, thereby suppressing flow separation and reducing drag. Both the planar and curved microstructures have excellent drag reduction performance.
Article
Multidisciplinary Sciences
Liujun Wu, Jiaqi Fu, Haonan Sui, Xiaoying Wang, Bowen Tao, Pengyu Lv, Mohan Chen, Zifeng Yuan, Huiling Duan
Summary: This study presents a method based on physics-informed neural networks (PINNs) to build yield criteria for porous single crystals. By embedding the associated flow rule into the training process, the resulting yield functions achieve higher accuracy and avoid the improper appearance of grooves in feed-forward neural networks. This framework exhibits excellent portability.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Mechanical
Jiaqi Fu, Wenbin Liu, Haonan Sui, Yangyang Cheng, Huiling Duan
Summary: In this paper, the authors combine the geometrical perturbation method and irradiation-dependent constitutive relationship to simulate the occurrence of necking instability in metallic materials. They reveal the competition between extrinsic geometrical imperfections and intrinsic microstructure evolution on the necking process. The effects of irradiation on necking instability and the formation of Luders band are also investigated.
ACTA MECHANICA SINICA
(2023)
