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Effective Impulse for Fully Clamped Rectangular Plates Under Internal Blast Loading

Acta Mechanica Solida Sinica 2022年第3期35卷 481-494页

作者： Xianben Ren Xiaoqiang Zhang Zhixin Huang Ying Li State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China

Under internal blast loading,the response of a beam or plate is highly correlated with the phenomenon of saturated impulse,which governs the deflection of the *** paper aims to investigate the phenomenon of saturated impulse for fully clamped rectangular plates subjected to internal blast *** on the rigid,perfectly plastic assumption,the relationship between saturation duration and saturation deflection is *** of the peak shock wave,the duration of shock wave and the peak quasi-static pressure loading on saturation duration and saturation deflection are *** is found that there is a critical duration for the internal blast impulse to reach saturation,and beyond this duration,the deflection of plate will no longer increase as the loading increases *** saturation deflection and saturation duration both exhibit regular variation patterns with the changes of the dimensionless peak shock wave,the duration of shock wave and the peak quasi-static pressure loading.

关键词： Internal blast Effective impulse Rectangular plate Effective acting time Simplified model

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Secrets of high thermal emission of transition metal disilicides TMSi_(2)(TM=Ta,Mo)

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Journal of Materials science & technology 2021年第30期89卷 114-121页

作者： Huimin Xiang Fuzhi Dai Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China

TMSi_(2)(TM=Ta,Mo)are extensively used as thermal emissivity agents in high emission coatings due to their well-known"high"emissivity in infrared ***,there is a paucity of the high temperature(HT)emissivity property of these two ***,room temperature(RT)spectrometer measurements have demonstrated that the emittance in infrared range of two silicides was considerably ***,providing critical HT data and satisfactory elucidation on the emission incompatibility of TMSi_(2)is eagerly *** this contribution,combining first principles calculations and Drude model,the reflectance spectra of TMSi_(2)were predicted at both RT and *** with spectrometer measurements,the intrinsic emittance of silicides was relatively low in the entire investigated *** explain the incompatible emission behavior,two simplified models including the majority of high emissivity coating,SiO_(2),were ***,with SiO_(2)considered in simulations,no matter covered on the surface or blended in the composites,the emittance of the TMSi_(2)enhanced *** theoretical results demonstrate the non-negligible significance of oxides on the high temperature performance of silicides and provide the guidelines for improving the emission performance of silicides and searching for potential high emissivity agents.

关键词： Disilicide Optical properties Thermal emission First-principles calculations Drude model

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Peak-like three-dimensional CoFe_(2)O_(4)/carbon nanotube decorated bamboo fabrics for simultaneous solar-thermal evaporation of water and photocatalytic degradation of bisphenol A

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Journal of Materials science & technology 2024年第12期179卷 40-49页

作者： Rui-Jie Pan Jing Wu Jin Qu Tingting Zhang Fan-Zhen Jiao Mang Zhao Meng-Yan Han Xiaofeng Li Zhong-Zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China

Catalytic CoFe_(2)O_(4) and solar-thermal carbon nanotube decorated bamboo fabrics(CCBF)are fabricated for integrating efficient solar steam generation from wastewater with catalytic degradation of its organic *** to the numerous porous channels and polar groups of bamboo fabric and the efficient solar-thermal energy conversion of black carbon nanotubes,the porous and hydrophilic CCBF exhibits fast upward transport of water,efficient solar light absorption,and high solar-thermal energy conversion *** decorated CoFe_(2)O_(4) not only enhances the solar-thermal energy conversion efficiency of CCBF but also activates potassium peroxymonosulfate to generate abundant highly active species for catalytic degradation of bisphenol A(BPA).Furthermore,folding the CCBF into a peak-like 3D evaporator can en-hance solar energy utilization,and gain environmental energy for promoting solar-thermal water evapo-ration and catalytic degradation *** 3D CCBF evaporator achieves a water evaporation rate of 2.72 kg m^(-2) h^(-1) under 1-sun ***,100%of the BPA in the seawater can be degraded within 10 *** exceptional high purification efficiency of 27.72 kg m^(-2) h^(-1) is achieved with the 3D evaporator during a long-term treatment of BPA-containing seawater under 1-sun *** work demonstrates efficient purification of seawater/wastewater with both metal ions and organic pollutants by simultaneous solar-thermal evaporation of water and catalytic degradation of organic pollutants.

关键词： Solar-thermal water evaporation Seawater desalination Catalytic degradation Carbon nanotubes CoFe_(2)O_(4)

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Amino-functionalized UiO-66-doped mixed matrix membranes with high permeation performance and fouling resistance

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Chinese Journal of Chemical Engineering 2024年第3期67卷 68-77页

作者： Yi Zhang Di Liu Zhaoli Wang Junjian Yu Yanyin Cheng Wenjing Li Zhe Wang Hongzhe Ni Yuchao Wang School of Chemical Engineering Changchun University of TechnologyChangchun 130012China Advanced Institute of Materials Science Changchun University of TechnologyChangchun 130012China Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012China School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China

For the reduction of bovine serum proteins from wastewater,a novel mixed matrix membrane was prepared by functionalizing the substrate material polyaryletherketone(PAEK),followed by carboxyl groups(C-SPAEKS),and then adding amino-functionalized UiO-66-NH_(2)(Am-UiO-66-NH_(2)).Aminofunctionalization of UiO-66 was accomplished by melamine,followed by an amidation reaction to immobilize Am-UiO-66-NH_(2),which was immobilized on the surface of the membrane as well as in the pore channels,which enhanced the hydrophilicity of the membrane surface while increasing the negative potential of the membrane *** nanoparticle-loaded ultrafiltration membrane has good permeation performance,with a pure water flux of up to 482.3 L·m^(-2)·h^(-1) for C-SPAEKS/AmUiO-66-NH_(2) and a retention rate of up to 98.7%for bovine serum albumin(BSA)-contaminated ***,after several hydrophilic modifications,the flux recovery of BSA contaminants by this series of membranes increased from 56.2%to 80.55%of pure *** results of ultra-filtration flux time tests performed at room temperature showed that the series of ultrafiltration membranes remained relatively stable over a test time of 300 ***,the newly developed mixed matrix membrane showed potential for high efficiency and stability in wastewater treatment containing bovine serum proteins.

关键词： Ultrafiltration Mixed matrix membranes Amino functionalization Hydrophilic modification Negatively charged

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Recent progress in inhibition of hydrogen evolution reaction in alkaline Al-air batteries

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National science Open 2024年第6期3卷 42-67页

作者： Yingjie Liu Zhong Wu Zhenbo Qin Yichun Liu Wenbin Hu Tianjin Key Laboratory of Composite and Functional Material Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)School of Materials Science and EngineeringTianjin UniversityTianjin 300350China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

Alkaline Al-air batteries(AABs)have attracted considerate attention due to their high theoretical capacity density and energy density with intrinsic safety and low ***,severe hydrogen evolution reaction(HER)decreases the discharge performance and increases usage risk,which restricts the development of *** this comprehensive review,a systematic overview of progress in inhibition methods of HER is provided,including anodic alloying,structural treatment,surface modification,additives and non-aqueous *** them,the most efficient method is additives,which was simple and provided the highest inhibition ***,suggestions and perspectives for future research are offered on improving the commercial application potential of AABs,providing guidance for aqueous metal-air batteries.

关键词： Al-air battery hydrogen evolution reaction anode electrolyte additive capacity density

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Paclitaxel Prodrug Nanomedicine for Potential CT-imaging Guided Breast Cancer Therapy

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Chinese Journal of Polymer science 2023年第11期41卷 1747-1759,I0008页

作者： Jia-Wei Chen Yi Shen Qing-Song Yu Zhi-Hua Gan State Key Laboratory of Organic-Inorganic Composite Materials Beijing Laboratory of Biomedical MaterialsBeijing Advanced Innovation Center for Soft Matter Science and EngineeringCollege of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China

Nanotheranostics,which combine the therapeutic and diagnostic functions in one integrated system,have received extensive attentions in cancer treatments because they enable non-invasive diagnosis,tumor-targeted drug delivery,and real-time monitoring of therapeutic ***,due to the high systemic toxicity of commonly used chemotherapeutics,current treatment still has ***,to simultaneously achieve safe cancer therapy and therapeutic response monitoring,an iodinated prodrug strategy was proposed.2,3,5-Triiodobenzoic acid(TIBA)was used to modify both paclitaxel(PTX)and the polymeric vehicle,so that the encapsulation efficiency of PTX could be increased and the systemic toxicity could be ***-prepared prodrug nanoparticles could accumulate passively in the tumor site and promptly release loaded drugs in response to the overexpressed GSH in cancer cells,which then caused efficient cell cycle arrest and apoptosis like that of the parent *** this rational design,safe and efficient antitumor therapy and real-time computer tomography(CT)imaging could be simultaneously realized,facilitating potential CT imaging-guided therapy of metastatic breast cancer.

关键词： CT imaging Paclitaxel Prodrug GSH responsiveness Polymeric nanoparticles

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Real-time fluorescent detection of food spoilage with doped quantum dots-anchored hydrogel sensor

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Nano Research 2024年第12期17卷 10467-10475页

作者： Chenying Li Jianzhong Li Lei Ji Yibin Zhu Jiajia Liu Jiatao Zhang School of Materials Science and Engineering Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China School of Chemistry and Chemical Engineering MIIT Key Laboratory of Medical Molecule Science and Pharmaceutical EngineeringMOE Key Laboratory of Cluster ScienceBeijing Institute of TechnologyBeijing 100081China

Spermine assumes a pivotal role in assessing food safety due to its potential to induce a spectrum of diseases upon excessive ***,contemporary spermine detection methodologies,exemplified by high-performance liquid chromatography(HPLC),demand costly instrumentation and the expertise of skilled *** address this challenge,the study introduces a portable fluorescence sensing *** fluorescent probes were realized through the utilization of CdS quantum dots deeply doped with Ag^(+)(CdS:Ag QDs)and nitrogen-doped carbon quantum dots(N-CQDs).Hydrogen bonds formed between CdS:Ag QDs and spermine result in the formation of the assembly and the decreasing of the fluorescence *** an effort to broaden the applicative scope and streamline deployment processes,fluorescent sensing hydrogels were meticulously engineered,capitalizing on the swelling properties inherent in polyvinyl alcohol(PVA)*** systematic delineation of the correlation between 1-R/B and spermine concentration facilitates the quantitative determination of spermine *** incorporation of this composite construct serves to alleviate environmental influences on the probes,thereby augmenting their *** portable fluorescent sensing platform proves pivotal in expeditiously measuring spermine concentration within the fluorescent sensing hydrogel,enabling a quantitative assessment of pork *** utilization of this platform for food freshness evaluation imparts the benefits of convenience,cost-effectiveness,and intuitive operation.

关键词： Ag^(+)doped CdS quantum dots nitrogen-doped carbon quantum dots ratiometric fluorescent sensing hydrogel portable platform spermine detection

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Electronic structure,bonding characteristics,and mechanical behaviors of a new family of Si-containing damage-tolerant MAB phases M_(5)SiB_(2)(M=IVB-VIB transition metals)

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Journal of advanced Ceramics 2022年第10期11卷 1626-1640页

作者： Na NI Hanchao ZHANG Yanchun ZHOU School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

MAB phases are layered ternary compounds with alternative stacking of transition metal boride layers and group A element *** now,most of the investigated MAB phases are concentrated on compounds with Al as the A element *** this work,the family of M_(5)SiB_(2)(M=IVB-VIB transition metals)compounds with silicon as interlayers were investigated by density functional theory(DFT)methods as potential MAB phases for high-temperature *** from the known Mo5SiB2,the electronic structure,bonding characteristics,and mechanical behaviors were systematically investigated and *** the composition of M_(5)SiB_(2) does not follow the general formula of experimentally reported(MB)_(2z)A_(x)(MB_(2))_(y)(z=1,2;x=1,2;y=0,1,2),their layered structure and anisotropic bonding characteristics are similar to other known MAB phases,which justifies their classification as new members of this material *** a result of the higher bulk modulus and lower shear modulus,Mo_(5)SiB_(2) has a Pugh’s ratio of 0.53,which is much lower than the common MAB *** was found that the stability and mechanical properties of M_(5)SiB_(2) compounds depend on their valence electron concentrations(VECs),and an optimum VEC exists as the criteria for *** hypothesized Zr and Hf containing compounds,i.e.,Zr_(5)SiB_(2) and Hf_(5)SiB_(2),which are more interesting in terms of high-temperature oxidation/ablation resistance,were found to be unfortunately *** cope with this problem,a new stable solid solution(Zr_(0.6)Mo_(0.4))_(5)SiB_(2) was designed based on VEC tuning to demonstrate a promising approach for developing new MAB phases with desirable compositions.

关键词： borides MAB phases density functional theory(DFT) thermodynamic stability electronic structure mechanical properties

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Size-controlled synthesis of Fe3O4 and Fe3O4@SiO2 nanoparticles and their superparamagnetic properties tailoring

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Progress in Natural science:Materials International 2023年第1期33卷 116-119页

作者： Muhammad Sajid Sidra Shuja Hongpan Rong Jiatao Zhang Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering School of Chemistry and Chemical Engineering Institute of Engineering Medicine Beijing Institute of Technology

Superparamagnetic properties and fine-tuning of colloidal Fe3O4nanoparticles are important for their widespread biomedical applications. Herein, colloidal Fe3O4nanoparticles（NPs） of different sizes（8–20 nm） were prepared,and their hydrophilization with SiO2shell coating to be Fe3O4@SiO2core-shell had been realized *** size of Fe3O4NPs was controlled by different heating rates. Transmission electron microscope（TEM）, powder X-ray diffractometry（XRD）, and vibrating sample magnetometer（VSM） were performed to examine the morphology, crystallinity, and magnetic properties of the prepared Fe3O4and Fe3O4@SiO2core-shell NPs,respectively. In addition, high resolution transmission electron microscope（HRTEM） results suggested that Fe3O4NPs had well crystallization. Enabled by such, their superparamagnetic properties can be fine-tuned accordingly and cater to their potential applications.

关键词： Fe3O4 nanoparticles Fe3O4@SiO2 hydrophilization Superparamagnetic Core-shell Aqueous inverse microemulsion

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Uneven deposition on the Al electrode under tension strain

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Journal of Energy Chemistry 2022年第8期31卷 98-103,I0004页

作者： Jie He Le Yang Na Li Wei-Li Song Shuqiang Jiao Hao-Sen Chen Daining Fang Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Structural deformation and dendrite formation, which would impact the electrochemical processes of rechargeable metal batteries, are usually observed in the high-energy density metal electrodes. Herein,we design an in-situ optical mechano-electrochemical system to study Al deposition on the Al electrode in non-aqueous Al batteries under non-uniform strain. Inhomogeneous distribution of applied strain is realized by creating an oval hole in the Al electrode. The results of the in-situ experiments suggest that the dense Al deposition, which is related to the evolution of surface morphology and increasing reactive sites, is achieved in the regions of stress concentration. The evolution of surface morphology is monitored by the in-situ tension experiments using scanning electron microscope and atomic force ***, a qualitative mathematical model is employed to analyze the changes of the local reaction rate owing to the changed surface morphology and the cracks of oxide film under tensile stress. The results are useful to understand the Al deposition when the mechanical force is applied to the metal electrode.

关键词： Metal electrode In-situ devices Al deposition Surface morphology Tensile strain

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