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Dip-coating of Superhydrophobic Surface on Irregular Substrates for Dropwise Condensation

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Journal of Bionic Engineering 2021年第2期18卷 387-397页

作者： Zhen Xiao Da Xu Wenwen Zhang Xinquan Yu Youfa Zhang Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China

Herein,self-assembled superhydrophobic composite coatings were successfully prepared using a one-step dip-coating method on different irregular *** fluorinated nano-SiO_(2) particles spread into a uniform layer owing to the viscosity of the composite *** the optimization of the process,the fabricated nanoporous-structured coating has low adhesion properties with chemical and high thermal *** baking at 250℃ for 2 h or soaking in a solution of pH=1 or pH=13 for 10 days,the coating could maintain its good *** self-ejecting effects of the condensed dewdrops and droplet bounce phenomenon indicate that the coatings can be well-distributed on components of different structures,and they have significant application prospects in irregular parts and industrial production in the near future.

关键词： superhydrophobic dip-coating self-assembled dropwise condensation irregular parts

A new criterion of coal burst proneness based on the residual elastic energy index

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International Journal of Mining science and Technology 2021年第4期31卷 553-563页

作者： Fengqiang Gong Yunliang Wang Zhiguo Wang Junfeng Pan Song Luo Engineering Research Center of Safety and Protection of Explosion&Impact of Ministry of Education(ERCSPEIME) Southeast UniversityNanjing 211189China School of Civil Engineering Southeast UniversityNanjing 211189China School of Resources and Safety Engineering Central South UniversityChangsha 410083China Dongtan Coal Mine of Yanzhou Coal Industry Co. LtdZoucheng 273512China CCTEG Coal Mining Research Institute Beijing 100013China

To evaluate the coal burst proneness more precisely,a new energy criterion namely the residual elastic energy index was *** study begins by performing the single-cyclic loading-unloading uniaxial compression tests with five pre-peak unloading stress levels to explore the energy storage characteristics of *** types of coals from different mines were tested,and the instantaneous destruction process of the coal specimens under compression loading was recorded using a high speed *** results showed a linear relationship between the elastic strain energy density and input energy density,which confirms the linear energy storage law of *** on this linear energy storage law,the peak elastic strain energy density of each coal specimen was obtained ***,a new energy criterion of coal burst proneness was established,which was called the residual elastic energy index(defined as the difference between the peak elastic strain energy density and post peak failure energy density).Considering the destruction process and actual failure characteristics of coal specimens,the accuracy of evaluating coal burst proneness based on the residual elastic energy index was *** results indicated that the residual elastic energy index enables reliable and precise evaluations of the coal burst proneness.

关键词： Coal burst Rock burst Linear energy storage law Residual elastic energy index Uniaxial compression

A review of validation methods for building energy modeling programs

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Building Simulation 2023年第11期16卷 2027-2047页

作者： Xin Zhou Ruoxi Liu Shuai Tian Xiaohan Shen Xinyu Yang Jingjing An Da Yan School of Architecture Southeast UniversityNanjingJiangsu Province210096China College of Architecture and Urban Planning Tongji UniversityShanghai200092China Key Laboratory of Ecology and Energy-saving Study of Dense Habitat Ministry of EducationShanghai200092China School of Environment and Energy Engineering Beijing University of Civil Engineering and ArchitectureBeijing100044China Building Energy Research Center School of ArchitectureTsinghua UniversityBeijing100084China

Building energy simulation analysis plays an important supporting role in the conservation of building *** the early 1980s,researchers have focused on the development and validation of building energy modeling programs(BEMPs)and have basically formed a set of systematic validation methods for BEMPs,mainly including analytical,comparative,and empirical *** on related papers in this field,this study systematically analyzed the application status of validation methods for BEMPs from three aspects,namely,sources of validation cases,comparison parameters,and evaluation *** applicability and characteristics of the three methods in different validation fields and different development stages of BEMPs were *** were proposed for researchers to choose more suitable validation methods and evaluation *** addition,the current development trend of BEMPs and the challenges faced by validation methods were investigated,as well as the existing progress of current validation methods under this trend was ***,the development direction of the validation method was clarified.

关键词： building energy simulation performance validation analytical validation comparative validation empirical validation

Cementing mechanism of bio-phosphate cement

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science China(Technological sciences) 2015年第6期58卷 1112-1117页

作者： YU XiaoNiu QIAN ChunXiang WANG Xin School of Materials science and Engineering Southeast University Research Institute of Green Construction Materials Southeast University

Cementing mechanism of bio-phosphate cement was investigated by Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS), thermogravimetric-differential scanning calorimetry(TG-DSC) analysis and scanning electron microscopy(SEM). The results of FTIR and XPS show that Si-O bond and Si(2p) electron binding energy in sandstone cemented via chemical and microbiological methods are changed by the binding effects of barium hydrogen phosphate with quartz sand. Compared with barium hydrogen phosphate precipitated in solution, there were higher decomposition temperatures or melting points in sandstone. The FTIR, XPS, and TG-DSC results indicate that the microbial-induced and chemical precipitation of barium hydrogen phosphate can interact with quartz sand to generate van der Waals bond, which plays a role in the binding function between loose sand particles and barium hydrogen phosphate. SEM results show that barium hydrogen phosphate after chemical precipitation in sandstone has better dispersion than microbiological deposition. Therefore, barium hydrogen phosphate via chemical precipitation did not bind loose sand particles into sandstone.

关键词： X-ray photoelectron spectroscopy Fourier transform infrared spectroscopy cementing mechanism bonding effects van der Waals bond

Microfluidic generation of egg-derived protein microcarriers for 3D cell culture and drug delivery

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science Bulletin 2017年第18期62卷 1283-1290页

作者： Yuxiao Liu Qian Huang Jie Wang Fanfan Fu Jianan Ren Yuanjin Zhao State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Department of General Surgery Jinling Hospital Medical School of Nanjing University

Microcarriers have a demonstrated value for biomedical applications,in particular for drug delivery and three-dimensional cell *** to develop this technique tend to focus on the fabrication of functional microparticles by using convenient methods with innovative but accessible *** by the process of boiling eggs in everyday life,which causes the solidification of egg proteins,we present a new microfluidic‘‘cooking"approach for the generation of egg-derived microcarriers for cell culture and drug *** the egg emulsion droplets are formed with exquisite precision during the microfluidic emulsification,the resultant egg microcarriers present highly monodisperse and uniform morphologies at the size range of hundred microns to one *** from the excellent biocompatibility of the egg protein components,the obtained microcarriers showed good performances of cell adherence and *** addition,after a freezing treatment,the egg microcarriers were shown to have interconnected porous structures throughout their whole sphere,could absorb and load different kinds of drugs or other active molecules,and work as microcarrier-based delivery *** features point to the potential value of the microfluidic egg microcarriers in biomedicine.

关键词： Microfluidics Microcarriers Drug delivery Cell culture Egg white

Mineralization and Cementation of Fugitive Dust based on the Utilization of Carbon Dioxide and Its Characterization

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Journal of Wuhan university of Technology(Materials science) 2018年第2期33卷 263-267页

作者：詹其伟钱春香 School of Materials science and Engineering Southeast University Nanjing 211189 China Research Institute of Green Construction Materials Southeast University Nanjing 211189 China

Fugitive dust was cemented, forming larger particles bond in the calcite-consolidation-layer by microbial method. The particular composition, the morphology, and thermal decomposition properties of the samples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Fourier transform infrared（FTIR） spectroscopy, and differential scanning calorimetry-thermogravimetry（DSC-TG）. The characterization data obtained showed that loose fugitive dust particles could be bonded and formed the consolidation-layer under the effect of calcite obtained by microbial method successfully. Meanwhile, the sample obtained by microbial method had superior wind-erosion resistance.

关键词： mineralization cementation fugitive dust Paenibacillus calcite-consolidation-layer

A multicomponent multiphase lattice Boltzmann model with large liquid–gas density ratios for simulations of wetting phenomena

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Chinese Physics B 2017年第8期26卷 225-234页

作者：张庆宇孙东科朱鸣芳 Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China School of Mechanical Engineenng Southeast UniversityNanjing 211189China

A multicomponent multiphase（MCMP） pseudopotential lattice Boltzmann（LB） model with large liquid–gas density ratios is proposed for simulating the wetting phenomena. In the proposed model, two layers of neighboring nodes are adopted to calculate the fluid–fluid cohesion force with higher isotropy order. In addition, the different-time-step method is employed to calculate the processes of particle propagation and collision for the two fluid components with a large pseudoparticle mass contrast. It is found that the spurious current is remarkably reduced by employing the higher isotropy order calculation of the fluid–fluid cohesion force. The maximum spurious current appearing at the phase interfaces is evidently influenced by the magnitudes of fluid–fluid and fluid–solid interaction strengths, but weakly affected by the time step *** density ratio analyses show that the liquid–gas density ratio is dependent on both the fluid–fluid interaction strength and the time step ratio. For the liquid–gas flow simulations without solid phase, the maximum liquid–gas density ratio achieved by the present model is higher than 1000：1. However, the obtainable maximum liquid–gas density ratio in the solid–liquid–gas system is lower. Wetting phenomena of droplets contacting smooth/rough solid surfaces and the dynamic process of liquid movement in a capillary tube are simulated to validate the proposed model in different solid–liquid–gas coexisting systems. It is shown that the simulated intrinsic contact angles of droplets on smooth surfaces are in good agreement with those predicted by the constructed LB formula that is related to Young＇s equation. The apparent contact angles of droplets on rough surfaces compare reasonably well with the predictions of Cassie＇s law. For the simulation of liquid movement in a capillary tube, the linear relation between the liquid–gas interface position and simulation time is observed, which is identical to the analytical prediction. The simulation

关键词： multicomponent multiphase lattice Boltzmann model large density ratio contact angle capillary flow

Influence of Deformation on Light Particles as a Probe of Nuclear Dissipation for a Neutron-Deficient ^178Pb System

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Communications in Theoretical Physics 2006年第4期45卷 687-690页

作者： YE Wei Department of Physics Southeast University Nanjing 210096 China

Using a diffusion model we investigate deformation effects on the sensitivity of different light particles to nuclear dissipation for a rather neutron-deficlent ^178Pb system. Galculations show that deformation significantly increases the sensitivity of neutron emission to dissipation strength, and that this effect becomes stronger with increasing deformation.

关键词： deformation effect isospin effect pre-scission particle multiplicity nuclear dissipation probe diffusion model

Detection of Phthalate Esters in Environmental Water Samples -Comparison of Nylon6 Nanofibers Mat-based Solid Phase Extraction and Other Conventional Extraction Methods

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Chinese Journal of Chemistry 2011年第3期29卷 567-574页

作者： Xu, Qian Ministry of Education Key Laboratory of Environmental Medicine and Engineering Southeast University Nanjing Jiangsu 210009 China State Key Laboratory of Bioelectronics Southeast University Nanjing Jiangsu 210096 China Suzhou Key Laboratory of Environment and Biosafety Suzhou Jiangsu 215123 China

In this article, a new method for simultaneous determination of six phthalate esters was developed by a combination of electrospun nylon6 nanofibers mat-based solid phase extraction with high performance liquid chromatography-ultraviolet detector （HPLC-UV）. The six phthalate esters were dimethyl phthalate （DMP）, diethyl phthalate （DEP）, butyl benzyl phthalate （BBP）, di-n-butyl phthalate （DBP）, di-（2-ethylhexyl） phthalate （DEHP） and dioctyl phthalate （DOP）. Under optimized conditions, all target analytes in 50 mL environmental water samples could be completely extracted by 2.5 mg nylon6 nanofibers mat and eluted by 100 μL solvent. Compared with C18 cartridges solid phase extraction, C 18 disks solid phase extraction and national standard method （China）, nylon6 nanofibers mat-based solid phase extraction was advantageous in aspects of simple and fast operation, low consumption of extraction materials and organic solvents. The four methods were applied to analysis of environment water samples. All the results indicated that the determination values of target compounds with the proposed method were consistent with C18 cartridges and C18 disks solid phase extraction method, and the new method was better than the national standard method in aspects of recovery, LOD and precision. Therefore, nylon6 nanofibers mat has great potential as a novel material for solid phase extraction.

关键词： Nylon6 nanofibers mat C18 cartridges C18 disks national standard method phthalate esters highperformance liquid chromatography-ultraviolet detector