Article
Engineering, Chemical
Zhe Yang, Longting Li, Chi Jiang, Na Zhao, Shenghao Zhang, Yaoli Guo, Yi Chen, Shuangmei Xue, Chenhao Ji, Shuzhen Zhao, Ralph Rolly Gonzales, Hideto Matsuyama, Jianzhong Xia, Q. Jason Niu
Summary: A novel nanofiltration (NF) membrane with high water permeability and antifouling properties was developed in this study. The membrane overcame the trade-off between permeability and selectivity, and demonstrated excellent resistance to membrane fouling during water treatment.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Fatemeh Abedi, Daryoush Emadzadeh, Marc A. Dube, Boguslaw Kruczek
Summary: This study successfully produced thin-film nanocomposite reverse osmosis (TFN-RO) membranes by embedding cellulose nanocrystals (CNCs) into the polyamide (PA) active layer. By dispersing the CNCs in an organic monomer solution, instead of adding hydrophilic nanoparticles to the aqueous monomer solution, the water permeance of the TFN membranes was improved. The hydrophobic functionalization of hydrophilic nanoparticles was found to be effective in overcoming the limitations of CNC incorporation in the membranes.
Article
Engineering, Chemical
Fatemeh Abedi, Daryoush Emadzadeh, Marc A. Dube, Boguslaw Kruczek
Summary: TFN membranes were produced by embedding cellulose nanocrystals (CNCs) into the polyamide (PA) active layer, improving water permeance. Acetylation of CNCs to form ACNCs facilitated their addition to organic monomer solution. Compared to the traditional approach, ACNC-TFN membranes showed stable NaCl rejection and increased water permeance.
Article
Engineering, Chemical
Liang Shen, Ming Yi, Susilo Japip, Chao Han, Lian Tian, Cher Hon Lau, Yan Wang
Summary: In this study, multifunctional crown ethers were successfully incorporated into thin-film composite polyamide membranes using a modified interfacial polymerization process. This modification resulted in increased water flux, reduced reverse salt flux, improved antifouling behavior, and enhanced chemical stability in harsh conditions compared to traditional TFC membranes.
Article
Physics, Multidisciplinary
Wang Meng-Ni, Liu Zhen, Gu Haol, Zhang Fu-Jianl, Zhang Zhong-Qiang, Ding Jian-Ning
Summary: This paper investigates the reverse osmosis process of saltwater through porous graphene RO membrane and optimizes its pore structure to enhance water flux and salt rejection. The findings are of great significance for understanding the mechanism of porous graphene-based membranes and designing and developing large-scale seawater desalination devices.
ACTA PHYSICA SINICA
(2022)
Article
Environmental Sciences
Chun-Mei Gao, Jin -Chao Chen, Sheng-Hui Liu, Yun-Qing Xing, Shi-Feng Ji, Hong -Yu Chen, Jia-Jian Chen, Peng Zou, Jiao-Nan Cai, Han Fang
Summary: In this study, the reverse thermally induced phase separation (RTIPS) method was used to construct high-performance membranes by incorporating Pluronic F127 and HKUST-1, effectively mitigating the permeability-selectivity trade-off. The membranes prepared showed excellent performance in terms of antifouling properties, permeability, and selectivity, showcasing the potential for practical applications.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Hanaa M. Hegab, Parashuram Kallem, Ravi P. Pandey, Mariam Ouda, Fawzi Banat, Shadi W. Hasan
Summary: Graphene and its derivative nanomaterials provide a novel approach to manipulate selective mass transport mechanisms at the sub-nanoscale level, offering features such as atomic thickness, extraordinary mechanical strength, and superior chemical stability. The creation of holey graphene, a derivative of graphene, by eliminating atoms to create pores with favorable defect features, shows potential in water purification and desalination applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Cody L. Ritt, Timothee Stassin, Douglas M. Davenport, Ryan M. DuChanois, Ines Nulens, Zhe Yang, Adi Ben-Zvi, Naama Segev-Mark, Menachem Elimelech, Chuyang Y. Tang, Guy Z. Ramon, Ivo F. J. Vankelecom, Rhea Verbeke
Summary: Limited understanding of membrane synthesis-structure-performance relationships has hindered significant progress in membrane development. The Open Membrane Database (OMD) offers a growing platform for researchers to maximize membrane performance and advance membrane technology.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Yao Qin, Jiawei Deng, Xiaohua Lu, Yudan Zhu
Summary: In this study, molecular dynamics simulations are used to investigate the transport and sieving behavior of H3O+ and Fe2+ ions on a functionalized graphene surface. The results show that the microstructure of the surface and the hydration structure of the ions play important roles in determining their behavior. The functionalization of the surface affects the ion density distribution and the hydration microstructure. The effective hydration radius and the interfacial H-bond structure contribute to the ion diffusion coefficient and selectivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Hao Dong, Zhiyang Zhu, Kaihua Li, Qixuan Li, Wenhui Ji, Benqiao He, Jianxin Li, Xiaohua Ma
Summary: A novel method for modifying polymer of intrinsic microporosity (PIM-1) membranes to obtain a series of sulfonated PIM-1 (SPIM-1) membranes was reported. The sulfonated SPIM-1 membranes showed improved gas separation properties and higher selectivity, demonstrating great potential for advanced membrane-based gas separation applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhuang Rao, Airong Zhang, Xiaoling Liu, Deyu Zhu, Guoqing Wang, Minqiu Lan, Zhengyun Wang, Lipei Jiang, Beibei Tang, Hongfang Liu
Summary: Surface -SO3H and -NH2 acid-base pair modified graphene oxide (BAGO) was constructed by polydopamine (PDA) coating onto GO and reaction with 2,2'-benzidinedisulfonic acid (BA). The composite proton exchange membrane (PEM) with increased selectivity and enhanced proton conductivity and methanol barrier effect was prepared by incorporating BAGO into the Nafion matrix. The results showed improved performance of the composite PEM in terms of proton conductivity and power density in a direct methanol fuel cell.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Chemical
Jiahao Mo, Xianhui Li, Zhifeng Yang
Summary: Reasonable design of a rational interlayer in an asymmetric ceramic nanofiltration (NF) membrane facilitates water transport as well as solute retention. The study develops a quantitative model to predict the influence of interlayer structure on the permselectivity and elucidates the role of the interlayer in improving the permeance-selectivity trade-off relationship. This research is of great significance to the future development of high-performance ceramic NF membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Hongping Yu, Zhichao Wang, Ting Long, Yu Li, Dilantha Thushara, Bo Bao, Shuangliang Zhao
Summary: This study investigates the separation of nanoparticles with different surface affinities in nanochannels using dynamical density functional theory. The research reveals that a proper design of the channel inner-surface can enhance the permeability and selectivity of particles. The study also proposes a model relating permeability to the equilibrium partition coefficient, which accurately predicts the transport of charged particles.
Article
Engineering, Chemical
Fujian Zhang, Zhongqiang Zhang, Zhen Liu, Guanggui Cheng, Shaofan Li, Jianning Ding
Summary: The concept of temporal selectivity breaks the paradigm of permeability and selectivity in membrane separation technology. In this study, a rotating centrifuge model made of porous copper foil covered with porous graphene was designed to explore the possibility of realizing temporal selectivity on a porous composite graphene-copper membrane (GCuM). The results show that the permeability of the porous rotating GCuM is significantly higher than commercial and other advanced reverse osmosis membranes, with a high salt rejection rate. The molecular mechanism analysis reveals that the boundary slip velocity plays a key role in salt rejection.
Article
Nanoscience & Nanotechnology
Zhi Geng, Shiqiang Liang, Meng Sun, Chuhan Liu, Nan He, Xia Yang, Xiaochun Cui, Wei Fan, Xianze Wang, Yang Huo
Summary: This study successfully fabricated free-standing symmetric hybrid forward osmosis (FO) membranes without internal concentration polarization by covalently linking metal-organic framework (MOF) nanofillers with a polymer matrix. The optimized hybrid membrane displayed outstanding water/Na2SO4 selectivity and excellent mechanical robustness, making it suitable for long-term FO separation of high-salinity solutions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Computer Science, Interdisciplinary Applications
Ying Song, Shaofan Li, Yunbo Li
Summary: In this work, a peridynamics approach is used to develop an inhomogeneous sea ice model and simulate crack propagation in a thermo-mechanical field of ice sheet. The proposed model not only provides an efficient tool to simulate the complex deformation pattern in ice failure process, but also reveals the mechanical mechanism of fracture in ice.
ENGINEERING WITH COMPUTERS
(2023)
Review
Computer Science, Interdisciplinary Applications
Dana Bishara, Yuxi Xie, Wing Kam Liu, Shaofan Li
Summary: Multiscale simulation and homogenization are essential computational technologies in material modeling and design, but their adoption in the industrial sector has been limited due to high computational cost. The rapid advancements in artificial intelligence and machine learning have provided new solutions to enhance the computational efficiency and accuracy of multiscale simulations.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Correction
Computer Science, Interdisciplinary Applications
Wing Kam Liu, Shaofan Li, Harold S. Park
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Mathematics, Interdisciplinary Applications
Yuxi Xie, Boyuan Li, Chao Wang, Kun Zhou, C. T. Wu, Shaofan Li
Summary: In this research, a Bayesian Regularization Network based Geometric Deviation Control (BRN-GDC) algorithm is developed to mitigate thermal distortion in 3D printing. The BRN-GDC method is training-free and does not require lots of data due to its shallow regularization network architecture. Unlike conventional point set registration methods, the Bayesian regularization network approach works well in finding the global geometric deviation field in 3D printing where there is a lack of one-to-one correspondence between design point data and scan point data. Two experiments in this paper demonstrate the capability of the BRN-GDC algorithm to control parameter- and location-dependent thermal distortion in 3D printing.
COMPUTATIONAL MECHANICS
(2023)
Article
Engineering, Chemical
Fujian Zhang, Zhongqiang Zhang, Zhen Liu, Guanggui Cheng, Shaofan Li, Jianning Ding
Summary: The concept of temporal selectivity breaks the paradigm of permeability and selectivity in membrane separation technology. In this study, a rotating centrifuge model made of porous copper foil covered with porous graphene was designed to explore the possibility of realizing temporal selectivity on a porous composite graphene-copper membrane (GCuM). The results show that the permeability of the porous rotating GCuM is significantly higher than commercial and other advanced reverse osmosis membranes, with a high salt rejection rate. The molecular mechanism analysis reveals that the boundary slip velocity plays a key role in salt rejection.
Article
Mechanics
Jincheng Fan, Heping Xie, Shaofan Li, Heng Zhang, Yong Zhang
Summary: The paper provides new insights into the bond-based Peridynamics (BPD) and ordinary state-based Peridynamics (OSPD) models by studying the bond length change and micro-potential function. The nonlocal elastic strain energy density (NESED) and constitutive bond force densities are discussed using specific influence functions. The findings show that the proposed method can retrieve the results of the OSPD model for small deformations. Additionally, the Peridynamic model has descriptive and predictive capabilities.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Acoustics
L. Ma, C. S. Cai, L. H. Wu, S. F. Li
Summary: The measurement of tensile forces in suspenders is crucial for safety inspection and monitoring in large structural engineering projects. The frequency-based method is commonly used, but affected by factors such as additional damping and boundary conditions. This study derives the equation of damped motion for a suspender-damper system, develops a numerical solution method based on finite difference scheme, and proposes a frequency-based multiple parameter identification method. The research demonstrates that the position and damping coefficient of the damper significantly affect the frequency and mode of the suspender-damper system, and discusses the influencing mechanism. Numerical examples show that the proposed algorithm can accurately identify multiple system parameters of the suspender, with a maximum error of 1%. The study also discusses the influence of frequency errors.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Construction & Building Technology
Qi Zheng, Chengyao Liang, Jinyang Jiang, Xinle Li, Shaofan Li
Summary: Understanding the nanoscale mechanism of calcium silicate hydrate (C-S-H) transformation during cement hydration is crucial for achieving desired properties in concrete. Through multimodal transmission electron microscopy (TEM), this study reveals that C-S-H rapidly nucleates at boundaries and then grows, with the development of C-S-H fibrils categorized into needle elongation and texture densification stages. The growth rate of C-S-H needles is estimated to be 7 nm/min, accompanied by a decrease in intrinsic porosity and thickening of C-S-H lamella. Electron diffraction analysis demonstrates the homogenization of C-S-H throughout hydration. These findings enhance our understanding of hydration mechanisms at a fundamental level.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Environmental
Qi Zheng, Chengyao Liang, Jinyang Jiang, Shaofan Li
Summary: In this study, the carbonation dynamics of alite hydrates were explored using electron microscopy. It was found that calcite is the dominant phase of carbonate crystals in the alite system throughout the carbonation process. The shape evolution of calcite crystals, from spindle carbonates to rhombohedrons, was observed, along with intermediate states such as polyhedral particles and layered rhomboids. The growth rate of calcite particles was determined to be approximately 0.2 μm/day, which may be influenced by the relative concentration of calcium ions and CO2 source. Atomic force microscopy was used to uncover the relationship between the microstructure and mechanical properties of calcite. Additionally, the morphology development of calcite crystals during carbonation was explained by the variation in surface energy of different facets. This work provides a unique approach to study carbonation kinetics and sheds light on underlying carbonation mechanisms at the nanoscale.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Mathematics, Interdisciplinary Applications
Bing Xue, A-Man Zhang, Yu-Xiang Peng, Qi Zhang, Shaofan Li
Summary: A meshfree orthotropic laminated shell model based on the reproducing kernel particle method (RKPM) and the Mindlin-Reissner shell theory is proposed for dealing with finite deformation of composite shell structures, suitable for arbitrary geometry in engineering. The model is validated through static and dynamic benchmarks, demonstrating its accuracy and convergence in solving nonlinear responses of composite structures.
COMPUTATIONAL MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Caglar Tamur, Shaofan Li
Summary: We have developed a bond-based peridynamics model that can accurately capture the fracture of polymer networks under finite deformation. Through numerical examples, we have demonstrated that this model is robust, efficient, and able to simulate crack growth in polymeric materials with good accuracy. Compared to existing continuum models, our approach is theoretically simple, rigorous, and computationally fast, making it a convenient simulation tool for modeling polymer failure processes.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xuan Hu, Shaofan Li
Summary: In this work, a cohesive Peierls-Rice-Beltz nonlocal continuum theory is developed and applied to model mesoscale dislocation motions and shear cracks in crystal solids. The main novelties of this work are the development of a bond-based peridynamics model and the ability to simulate different types of fractures. The proposed method is shown to be effective in modeling inelastic fracture in nonlocal cohesive media.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Polymer Science
Caglar Tamur, Shaofan Li, Danielle Zeng, Brian J. Edwards
Summary: In this study, we developed an artificial neural network (ANN) to predict the mechanical properties of crystalline Polyamide12 (PA12) based on molecular dynamics simulations. We showed that this approach is efficient and accurate in providing three-dimensional molecular-level anisotropic stress-strain relation of PA12 for any macroscale mechanics model, laying the foundation for a multiscale finite element method for simulating semicrystalline polymers.
Article
Engineering, Marine
Ying Song, Luwen Zhang, Shaofan Li, Yunbo Li
Summary: Building an accurate ice constitutive model to predict ice loads during ship-ice collision is challenging due to the complex mesoscopic and macroscopic characteristics of ice. In this study, we combine a conventional plasticity model with state-based peridynamics and consider the effects of temperature distribution, strain rate, and pressure sensitivity. The proposed model successfully predicts material failure of different types of ice and is validated through benchmark tests.
JOURNAL OF MARINE SCIENCE AND APPLICATION
(2023)
Article
Mathematics, Interdisciplinary Applications
Weidong Li, Nguyen-Thanh Nhon, Qi Zhang, Hejun Du, Shaofan Li, Kun Zhou
Summary: A multigrid coupling approach of the extended isogeometric-meshfree method and bond-based peridynamics is developed for static and dynamic fracture problems. The approach divides the problem domain into two subdomains and connects them with interface meshes to capture fracture patterns.
COMPUTATIONAL MECHANICS
(2023)
