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学者姓名：任志英
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Abstract ：
Superhydrophilic-underwater superoleophobic materials have received extensive attention in recent years due to their excellent performance in oil-water separation. However, they are still challenged by practical limitations. One of the main issues is the modification of traditional metal-based surfaces. These surfaces are typically modified through roughening and chemical treatment, but they still face significant challenges. Here, we report a metal rubber(MR) filtration material with exceptional superhydrophilic-underwater superoleophobic properties, fabricated through a synchronous process combining two-dimensional(2D) iron oxide sheets and zerodimensional(0D) silica nanospheres. This composite structure enhances surface wettability by integrating the dimensional effects of 2D and 0D components. This superwettable material, termed P-MRFS, incorporates a composite structure that enhances surface wettability by integrating the size effects of both 2D and 0D components. The P-MRFS material achieved a peak separation flux over 2500 L & sdot;m-2 & sdot;h-1 and up to 99.88% purity across various oil in water emulsions, including hexane, petroleum ether, dimethylbenzene, dichloroethane, and toluene, with a stable efficiency of 99.7% after 30 separation cycles. P-MRFS demonstrated durability under demanding conditions, maintaining over 99.5% separation efficiency after 48 hours in acidic, alkaline, and saline solutions and following 400 cm of abrasion under a 200 g load. Importantly, the study employed computational fluid dynamics(CFD) simulations to analyze the micro-scale mechanisms of emulsion separation, enabling realtime observation of droplet dynamics and revealing interactions within the multi-fiber structure that enhance separation efficiency. Overall, the P-MRFS material showed outstanding stability in corrosion and abrasion resistance, sustaining high emulsion separation performance even in complex environments. These findings suggest the material's high potential for future applications in oil-water separation, environmental protection, including crude oil recovery, and other industrial uses, underscoring its significant practical utility.
Keyword ：
CFD simulation CFD simulation Emulsion separation Emulsion separation Microstructural dimension control Microstructural dimension control oleophobic oleophobic Super hydrophilic Super hydrophilic Surface composite dimension structure Surface composite dimension structure underwater super underwater super
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| GB/T 7714 | Pi, Peng , Ren, Zhiying , Pan, Ling et al. Composite dimensional structure superhydrophilic-underwater superoleophobic material for efficient separation of oil-in-water emulsions [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2025 , 362 . |
| MLA | Pi, Peng et al. "Composite dimensional structure superhydrophilic-underwater superoleophobic material for efficient separation of oil-in-water emulsions" . | SEPARATION AND PURIFICATION TECHNOLOGY 362 (2025) . |
| APA | Pi, Peng , Ren, Zhiying , Pan, Ling , Lin, Youxi , Yang, Yu , Li, Yuedan . Composite dimensional structure superhydrophilic-underwater superoleophobic material for efficient separation of oil-in-water emulsions . | SEPARATION AND PURIFICATION TECHNOLOGY , 2025 , 362 . |
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Entangled porous metallic pseudo-rubber (EPMPR) is formed by interlaced helical metal wires, and its unique structure can convert mechanical vibration energy into heat, providing significant damping effects. This study innovatively proposes a method for constructing the elastic hysteresis curve of EDMMR at the physical level, and decomposes and extracts the hysteresis curve using virtual manufacturing technology (VMT). Based on finite element numerical calculation nodes, this study constructs the stiffness curve of EPMPR's series-parallel structure, and considers the contact behavior of EPMPR, especially under high-temperature conditions, through dynamic evolution analysis of discretized numerical models of spatial contact behavior, further studying its damping hysteresis behavior. Specifically, this study also proposes for the first time and comprehensively analyzes the dynamic and static parameters of EPMPR under different temperatures and loads, providing in-depth insights into its mechanical behavior and energy dissipation mechanisms. Experimental results demonstrate that under the complex topology structure and thermomechanical coupling, the elastic hysteresis curve of EPMPR can accurately predict its damping characteristics under different high-temperature environments, providing a theoretical foundation for EPMPR's application in advanced equipment and structural extreme environments.
Keyword ：
Constitutive model Constitutive model Damping hysteresis characteristics Damping hysteresis characteristics Entangled porous metallic pseudo-rubber Entangled porous metallic pseudo-rubber (EPMPR) (EPMPR) Thermo-mechanical coupling Thermo-mechanical coupling Virtual manufacturing technology (VMT) Virtual manufacturing technology (VMT)
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| GB/T 7714 | Wang, Qinwei , Ren, Zhiying , Shi, Linwei et al. Hysteresis characteristics of entangled porous metallic pseudo-rubber under complex topological structures and thermomechanical coupling effects [J]. | EUROPEAN JOURNAL OF MECHANICS A-SOLIDS , 2025 , 111 . |
| MLA | Wang, Qinwei et al. "Hysteresis characteristics of entangled porous metallic pseudo-rubber under complex topological structures and thermomechanical coupling effects" . | EUROPEAN JOURNAL OF MECHANICS A-SOLIDS 111 (2025) . |
| APA | Wang, Qinwei , Ren, Zhiying , Shi, Linwei , Huang, Zihao , Feng, Shaotong , Li, Shuaijun . Hysteresis characteristics of entangled porous metallic pseudo-rubber under complex topological structures and thermomechanical coupling effects . | EUROPEAN JOURNAL OF MECHANICS A-SOLIDS , 2025 , 111 . |
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High stiffness and superior energy consumption have consistently been primary research focuses in the field of damping materials. Hence, this work presented an innovative interpenetrating phase composite (IPC) crafted from wound elastic entangled metallic porous material and silicone rubber. The proposed composite effectively integrates the unique properties of the original materials, showcasing a seamless blend. Dynamic experimental tests were conducted to analyze the dynamic compression mechanical behavior of the composites, revealing that the composites exhibit excellent energy consumption capabilities and elevated stiffness characteristics. The improvement in both stiffness and damping characteristics is attributed to the addition of silicone rubber, which solidifies the structure of the composites. The introduction of interfacial friction results from maintaining compression, sliding, and other frictional interactions among the original spiral coils. Notably, the composites also display exceptional fatigue resistance. Overall, this work demonstrates the potential to concurrently achieve enhanced stiffness and superior energy consumption through the use of entangled metallic porous material and silicone rubber. © 2024 Elsevier Ltd
Keyword ：
Damping Damping Energy utilization Energy utilization Friction Friction Porous materials Porous materials Rubber Rubber Silicones Silicones Stiffness Stiffness
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| GB/T 7714 | Zheng, Xiaoyuan , Xiao, Zhongmin , Ren, Zhiying et al. Entangled metallic porous material–silicone rubber interpenetrating phase composites with simultaneous high specific stiffness and energy consumption [J]. | Composite Structures , 2024 , 341 . |
| MLA | Zheng, Xiaoyuan et al. "Entangled metallic porous material–silicone rubber interpenetrating phase composites with simultaneous high specific stiffness and energy consumption" . | Composite Structures 341 (2024) . |
| APA | Zheng, Xiaoyuan , Xiao, Zhongmin , Ren, Zhiying , Zi, Bao , Wu, Yiwan , Yao, Liming et al. Entangled metallic porous material–silicone rubber interpenetrating phase composites with simultaneous high specific stiffness and energy consumption . | Composite Structures , 2024 , 341 . |
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Metal Rubber (MR), characterized by its porous topology and metal-based entangled structure, is commonly utilized in high-temperature environments. The intricate nature of MR's structure complicates the accurate experimental investigation of its thermophysical properties, thereby restricting its broader applications. Therefore, based on numerical simulation, the three-dimensional reconstruction of the spatial topology of MR is achieved. Additionally, MATLAB-LS/DYNA-ABAQUS is coupled to replicate the heat transfer process of MR at macro-microscopic scales. Our findings elucidate the relationship between MR's density, number of contact points, and thermal conductivity, revealing a stepwise decrease in thermal conductivity along the forming direction and a spatially varying anisotropic heat transfer mechanism that involves energy feedback on non-forming surfaces. Specifically, at the material level of investigation, a molecular dynamics model for heat transfer in microscopic metal wire contacts was generated. This model enables the simulation and dynamic tracking of atomic group thermal behavior under temperature effects. Finally, equivalent thermal conductivity (ETC) tests were conducted concurrently. By integrating the thermoelectric analogy method, we introduced for the first time a hybrid series-parallel mode and the tortuosity of discontinuous materials. This approach comprehensively considers critical factors such as porosity, temperature, and interlayer thermal resistance, culminating in the development of a predictive numerical model for thermal conductivity in porous metal-based materials. In this study, a bottom-up multiscale research approach is proposed to deeply explore the spatially multidirectional heat transfer mechanisms of microporous metal-based tangled materials, from the material level to the complex topological structural level. Simultaneously, new dimensions are opened for the study of such materials with unique discontinuous structural characteristics. © 2024 The Authors
Keyword ：
ABAQUS ABAQUS Heat resistance Heat resistance Heat transfer performance Heat transfer performance Micropores Micropores Microporosity Microporosity Microporous materials Microporous materials Rubber applications Rubber applications Thermal conductivity Thermal conductivity
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| GB/T 7714 | Tang, Kequan , Shen, Liangliang , Shi, Linwei et al. Cross-scale study of heat transfer performance in metal rubber with complex topological structures [J]. | Journal of Materials Research and Technology , 2024 , 33 : 6467-6480 . |
| MLA | Tang, Kequan et al. "Cross-scale study of heat transfer performance in metal rubber with complex topological structures" . | Journal of Materials Research and Technology 33 (2024) : 6467-6480 . |
| APA | Tang, Kequan , Shen, Liangliang , Shi, Linwei , Yan, Weidong , Song, Qiang , Ren, Zhiying . Cross-scale study of heat transfer performance in metal rubber with complex topological structures . | Journal of Materials Research and Technology , 2024 , 33 , 6467-6480 . |
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SiCf/SiC composite materials are essential for spacecraft thermal protection, determining the safety of spacecraft. However, their complex structures and intricate fabrication processes have led to an unclear understanding of their failure mechanisms, limiting their application. In this study, circumferential compression experiments were conducted, and X-ray computed tomography (X-CT) was used to analyze the distribution characteristics of pore spaces. The experimental results indicate that damage manifests as secondary fracture phenomena based on temporal evolution characteristics. Specifically, after experiencing performance degradation of 24.73–60.96%, the material still maintained basic stability, exhibiting a performance recovery of 31.55–36.1% under the applied load until failure. To predict the dynamic damage behavior of materials at multiple scales, a multi-scale method combining statistical and microscopic approaches was proposed. A micro representative volume element (RVE) random fiber pore distribution model was established based on random processes and random medium theory. Finally, considering the CT data and the principle of minimum potential energy, a macroscopic finite element model of the micro-pores' structural characteristics in a three-dimensional wound tube was reconstructed. The results indicate that cracks initiate around pore defects and gradually propagate to form crack bands. The model closely matches the macroscopic damage and microscopic characteristics of the material. This work provides a new approach for the numerical simulation of pore defects in such materials. © 2024
Keyword ：
Computerized tomography Computerized tomography Cracks Cracks Failure (mechanical) Failure (mechanical) Potential energy Potential energy Random processes Random processes Silicon Silicon Three dimensional computer graphics Three dimensional computer graphics
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| GB/T 7714 | Yan, Weidong , Ren, Zhiying , Fan, Xinyu et al. Multi-scale pore model construction and damage behavior analysis of SiCf/SiC composite tubes [J]. | Materials Characterization , 2024 , 214 . |
| MLA | Yan, Weidong et al. "Multi-scale pore model construction and damage behavior analysis of SiCf/SiC composite tubes" . | Materials Characterization 214 (2024) . |
| APA | Yan, Weidong , Ren, Zhiying , Fan, Xinyu , Yan, Zhongwei , Shen, Liangliang , Xu, Jian . Multi-scale pore model construction and damage behavior analysis of SiCf/SiC composite tubes . | Materials Characterization , 2024 , 214 . |
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This work is devoted to investigate the mechanical properties of entangled metallic wire material-silicone rubber composites (EMWM-SRC) sandwich structures. The core material involves the infiltration of silicone rubber (SR) into the pores of entangled metallic wire material (EMWM) through vacuum compression. Low-velocity impact tests were conducted to compare dynamic responses and energy absorption characteristics. Additionally, visual observation and computerized tomography scans were employed to characterize the damage mechanisms. It was observed that the sandwich structures did not perforate at 40–100 J impact energies, demonstrating outstanding energy absorption (97.5 %). Further explorations were conducted to explore the influence of EMWM density, wire diameter, and facesheet thickness. The results revealed that an increase in matrix density and wire diameter enhances the sandwich structure's impacts resistance but was accompanied by a decrease in energy absorption capacity. Notably, the energy absorption efficiency of the proposed sandwich structures consistently remains at a high level (88 %). Furthermore, facesheet thickness was identified as a significant factor affecting the sandwich structure. Finally, the superiority of the EMWM-SRC sandwich structure in enhancing impact resistance was validated by comparing it with individual EMWM and SR sandwich structures. These findings of this work offer valuable guidance for designing novel sandwich structures with excellent impact resistance. © 2024 Elsevier Ltd
Keyword ：
Absorption efficiency Absorption efficiency Computerized tomography Computerized tomography Coremaking Coremaking Energy absorption Energy absorption Rubber Rubber Sandwich structures Sandwich structures Silicones Silicones Wire Wire
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| GB/T 7714 | Zheng, Xiaoyuan , Xiao, Zhongmin , Ren, Zhiying et al. Low-velocity impact response of sandwich structures with cores made from entangled metallic wire material - silicone rubber composites [J]. | Construction and Building Materials , 2024 , 431 . |
| MLA | Zheng, Xiaoyuan et al. "Low-velocity impact response of sandwich structures with cores made from entangled metallic wire material - silicone rubber composites" . | Construction and Building Materials 431 (2024) . |
| APA | Zheng, Xiaoyuan , Xiao, Zhongmin , Ren, Zhiying , Zi, Bao , Bai, Hongbai , Wu, Yiwan et al. Low-velocity impact response of sandwich structures with cores made from entangled metallic wire material - silicone rubber composites . | Construction and Building Materials , 2024 , 431 . |
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A secondary multidirectional vibration isolation system (MR-SMDIS) was designed by utilizing the multidirectional vibration isolation characteristics of metal rubber (MR) vibration isolators. According to the spatial distribution angles and contact form of the spatial distribution of metal wires in MR, the linear stiffness ratio between axial and radial directions, damping ratio, and the ratio of nonlinear stiffness to linear stiffness were analyzed. The nonlinear response of an MR-SMDIS under random vibrations was analyzed using the extended harmonic equilibrium method with alternating frequency–time domain (HB–AFT). Random signals were further created to analyze the isolation efficiency and peak amplification of the MR-SMDIS. The particle swarm optimization (PSO) was used to optimize the axial and radial linear stiffness, damping, and nonlinear stiffness of the MR isolator. And the optimal preparation parameters for MR were solved with a genetic algorithm. Furthermore, random vibration experiments of the MR-SMDIS were conducted. The results showed that the relative error in identifying the dynamic parameters of the prepared MR isolators using parameter identification algorithms was within ± 13% compared to the design parameters. The MR-SMDIS met the design requirements regarding modal frequencies and peak amplification factors. The relative error between the experimental and numerical simulation results was within 15%. Graphical abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer Nature B.V. 2024.
Keyword ：
Metal rubber Metal rubber Multi-directional Multi-directional Random vibration Random vibration Secondary vibration isolation Secondary vibration isolation
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| GB/T 7714 | Shi, X. , Zhou, H. , Zhou, C. et al. Design and mechanical properties of metal rubber secondary multidirectional vibration isolation system under random vibration [J]. | Nonlinear Dynamics , 2024 , 112 (17) : 14805-14828 . |
| MLA | Shi, X. et al. "Design and mechanical properties of metal rubber secondary multidirectional vibration isolation system under random vibration" . | Nonlinear Dynamics 112 . 17 (2024) : 14805-14828 . |
| APA | Shi, X. , Zhou, H. , Zhou, C. , Guo, Z. , Ren, Z. . Design and mechanical properties of metal rubber secondary multidirectional vibration isolation system under random vibration . | Nonlinear Dynamics , 2024 , 112 (17) , 14805-14828 . |
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With regards to the mechanical environment not meeting operational requirements, several steps are taken to address the issue of local amplification of vibrations in individual instruments caused by secondary isolation. Firstly, regarding the metal rubber double-layer isolation system, the flexible stiffness of the mounting plate is fully considered, and a secondary vibration reduction system model with both flexibility and rigidity is established. Secondly, based on the target frequency, the frequency response function of the secondary vibration reduction system is decoupled systematically to solve for the stiffness of the damper. Finite element analysis is then employed for random vibration analysis to validate the feasibility of the theory model of the composite secondary isolation system. Finally, the experimental verification is conducted using a vibration table. The results indicate that when the secondary isolation system meets the engineering stiffness requirements and its first natural frequency is below 40 Hz, the vibration reduction efficiency can reach over 70%. Experimental results are generally consistent with the simulation results. © 2024 Nanjing University of Aeronautics an Astronautics. All rights reserved.
Keyword ：
damping efficiency damping efficiency metal rubber shock absorber metal rubber shock absorber natural frequency natural frequency random vibration random vibration secondary flexible vibration isolation secondary flexible vibration isolation
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| GB/T 7714 | Shi, X. , Guo, Z. , Huang, Z. et al. Design and Mechanical Performance Analysis of Two-Stage Flexible Damping System; [二级柔性减振系统设计及力学性能分析] [J]. | Journal of Vibration, Measurement and Diagnosis , 2024 , 44 (3) : 494-501and618 . |
| MLA | Shi, X. et al. "Design and Mechanical Performance Analysis of Two-Stage Flexible Damping System; [二级柔性减振系统设计及力学性能分析]" . | Journal of Vibration, Measurement and Diagnosis 44 . 3 (2024) : 494-501and618 . |
| APA | Shi, X. , Guo, Z. , Huang, Z. , Zhou, C. , Ren, Z. . Design and Mechanical Performance Analysis of Two-Stage Flexible Damping System; [二级柔性减振系统设计及力学性能分析] . | Journal of Vibration, Measurement and Diagnosis , 2024 , 44 (3) , 494-501and618 . |
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月尘防护是未来月面探索中面临的重要难题之一,不同防护效果将对航天器性能产生重要影响,深入开展月尘颗粒在航天器表面的微观吸附行为及其防护技术的研究至关重要.主要从月尘颗粒吸附机理、吸附力测试技术及月尘防护的方法展开综述与展望.首先说明月尘颗粒的物理、化学性质及吸附机理,重点聚焦建立月尘颗粒与基体表面的吸附力解析模型,包括范德华力、静电力、毛细力;其次,利用原子力技术测量月尘颗粒吸附力参数.分析对比目前针对微纳米颗粒吸附问题的主动与被动防护技术.对月尘吸附力测试与月尘防护技术发展等问题的发展趋势进行展望.通过原子力技术开展月尘颗粒吸附力,解决现有其余测试技术产生的弊端,对推进月尘颗粒吸附机理及防护技术的研究具有重要意义.
Keyword ：
原子力显微镜 原子力显微镜 吸附机理 吸附机理 月尘 月尘 月尘模拟物 月尘模拟物 月尘防护技术 月尘防护技术
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| GB/T 7714 | 王浩宇 , 任志英 , 陈书赢 et al. 月尘微观吸附机理及其防护技术研究现状 [J]. | 中国表面工程 , 2024 , 37 (4) : 1-17 . |
| MLA | 王浩宇 et al. "月尘微观吸附机理及其防护技术研究现状" . | 中国表面工程 37 . 4 (2024) : 1-17 . |
| APA | 王浩宇 , 任志英 , 陈书赢 , 郭伟玲 , 马国政 , 赵海朝 . 月尘微观吸附机理及其防护技术研究现状 . | 中国表面工程 , 2024 , 37 (4) , 1-17 . |
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The hysteresis model has long been widely discussed to describe the dynamic behavior of magnetic materials or devices. Most models solve the hysteresis with the completely absent or present phase lags of the critical points at various frequencies. However, the variation of the hysteresis loop with the frequency is not effectively demonstrated as the measurement shows that the phase lags are changing with the frequency. This is assumed to be caused by neglecting the connection between the loop and time-domain curve, which is necessary to determine the form of the time-dependent loss. Jiles-Atherton model is taken here as an example and the connections under different frequencies are revealed from analyzing the model errors. According to the test data of the Terfenol-D material, a new methodology is proposed to consider the influence of the frequency-dependent loss on the hysteresis loop. The methodology idea is derived from the viewpoint of phase lag and amplitude attenuation of the magnetization caused by the loss. Meanwhile, the equation is established built on the viscoelastic damping assumption to naturally realize the phase lag of all the points. From the qualitative analysis, the proposed model removes the limitations in computing the loop widths and phase lags at different frequencies. Furthermore, the model is validated as it corresponds well with the experimental results. With strong description ability, clear parametric influence and simple expression, the proposed model may become a substitute for classic frequency-dependent hysteresis models.
Keyword ：
Amplitude attenuation Amplitude attenuation Frequency-dependent hysteresis Frequency-dependent hysteresis Phase lag Phase lag Viscoelastic damping assumption Viscoelastic damping assumption
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| GB/T 7714 | Wu, Hanbing , Xue, Guangming , Bai, Hongbai et al. A new modeling methodology for frequency-dependent hysteresis from the perspective of phase lag and amplitude attenuation [J]. | NONLINEAR DYNAMICS , 2024 , 113 (8) : 7759-7777 . |
| MLA | Wu, Hanbing et al. "A new modeling methodology for frequency-dependent hysteresis from the perspective of phase lag and amplitude attenuation" . | NONLINEAR DYNAMICS 113 . 8 (2024) : 7759-7777 . |
| APA | Wu, Hanbing , Xue, Guangming , Bai, Hongbai , Ren, Zhiying . A new modeling methodology for frequency-dependent hysteresis from the perspective of phase lag and amplitude attenuation . | NONLINEAR DYNAMICS , 2024 , 113 (8) , 7759-7777 . |
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