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SSRN 2025年

作者： Wang, Zihan Li, Xinze He, Chenbo Yang, Rui Yang, Mingyang Tang, Guihua Zhang, Hu Xie, Qi Sun, Jingjing Sun, Chencheng Li, Junning MOE Key Laboratory of Thermo-Fluid Science and Engineering School of Energy and Power Engineering Xi’an Jiaotong University Xi’an710049 China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong University Xi’an710049 China Science and Technology on Advanced Functional Composites Laboratory Aerospace Research Institute of Materials and Processing Technology Beijing100076 China

Improving thermal management materials is crucial for achieving multifunctional integrated applications and enhancing energy efficiency. Though phase change materials exhibit excellent thermal storage properties, the limited thermal conductivity has hindered widespread use in dynamic and complex thermal environments. To address these challenges, we proposed a novel sandwich-structured composite based on composite phase change materials (CPCMs) with gradient thermal conductivities. The composite incorporates n-octadecane/melamine formaldehyde resin microencapsulated phase change materials (MPCM) as the phase change component, with nanoporous silica aerogel (SA) and flake graphite (FG) serving as the thermal insulation skeleton and high-thermal-conductivity support material, respectively. Characterization results revealed that the prepared CPCMs exhibited excellent shape stability and mechanical strength. Specifically, the SA/PCM composite demonstrated an ultralow thermal conductivity of 0.0725 W·m−1·K−1 and a phase change enthalpy of 109 J·g−1. In contrast, the thermal conductivity of FG/PCM composites increased significantly to 0.48–2.934 W·m−1·K−1 with 10–50 wt% FG loading, reaching up to 13.5 times that of pure MPCM. Transient thermal shock and multidirectional non-uniform heat disturbance tests confirmed the exceptional thermal insulation and temperature regulation capabilities in complex environments. Furthermore, tests based on real outdoor temperatures demonstrated that rooms equipped with the sandwich composite maintained more stable indoor temperatures, with a single-day maximum indoor temperature reduction of 3.15 °C than that using pure aerogel. These findings highlight the significant potential of the proposed sandwich-structured composite for advanced thermal management applications. © 2025, The Authors. All rights reserved.

关键词： Thermal insulation

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Hierarchically porous materials:synthesis strategies and emerging applications

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Frontiers of Chemical Science and Engineering 2016年第3期10卷 301-347页

作者： Minghui Sun Chen Chen Lihua Chen Baolian Su State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Laboratory of Inorganic Materials Chemistry

Great interests have arisen over the last decade in the development of hierarchically porous *** hierarchical structure enables materials to have maximum structural functions owing to enhanced accessibility and mass transport properties,leading to improved performances in various *** porous materials are in high demand for applications in catalysis,adsorption,separation,energy and *** the present review,recent advances in synthesis routes to hierarchically porous materials are reviewed together with their catalytic contributions.

关键词： hierarchically porous materials synthesis application

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One-step preparation of porous aminated-silica nanoparticles and their antibacterial drug delivery applications

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Journal of materials Science & technology 2020年第15期47卷 139-146页

作者： Yongren Wu Shun Chen Yang Liu Zhiwei Lu Shaokun Song Yang Zhang Chuanxi Xiong Lijie Dong Center for Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan430070China

Porous functionalized silica nanoparticles have attracted the interest of researchers as they are excellent carriers for antibacterial drug delivery *** this work,porous aminated-silica nanoparticles(SiO2-NH2 NPs) were prepared via one-step approach through the ammonia-catalyzed hydrolysis of tetraethylorthosilicate(TEOS) and(3-aminopropyl) triethoxysilane(APTES) in a mixed water-ethanol *** obtained SiO2-NH2 NPs displayed a spherical morphology and relatively uniform size distribution,while the morphology and structure of SiO2-NH2 NPs were mainly determined by the order of the reagents added and the pH value of the *** characterization,the results showed that there were a large number of-NH2 groups on the surface of porous SiO2-NH2 NPs and that the porous SiO2-NH2 NPs had a large surface area of 476 m2 g-1 with an average pore width of 4.3 *** an absorbing-releasing experiment and bacterial test,those SiO2-NH2 NPs were found to exhibit efficient absorption and release of drugs as well as a pH-de pendent release pattern of epirubicin-loaded SiO2-NH2 ***,SiO2-NH2@capsaicin NPs exhibited antibacterial *** porous SiO2-NH2 NPs could be a candidate for drug delivery for antibacterial applications owing to their tailored porous structure and high surface area.

关键词： Porous aminated-silica nanoparticles Surface area Drug delivery Antibacterial property

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An impact damage monitoring method for composite materials based on strain correlation of interlayers with optical fiber sensors

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Composite Structures 2025年 368卷

作者： Tang, Zhao Gui, Xin Li, Zhengying Zeng, Fanhao Li, Shuxin National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of Technology Wuhan430070 China School of Information Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

The barely visible impact damage (BVID) sustained by composite structures will pose significant safety hazards if not promptly detected. The existing detection methods, including surface-mounted sensors, cannot be used to accurately monitor the internal damage of composite materials online. In this paper, a new method of damage detection for carbon fiber reinforced polymers (CFRP) during the impact process is proposed based on the correlation between strain distribution through the thickness and damage by using a stereo optic fiber sensor network embedded between CFRP interlayers. In this method, the strain correlation based on the strain distribution through the thickness under the impact load is constructed, and a damage index DI-IR is proposed according to the change of strain relationship to judge the damage state. This method can effectively provide online monitoring and identification of CFRP impact damage in the experiment. © 2025

关键词： Fiber reinforced plastics

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Fabrication and Property of SiC Ceramic with Large Thickness/Diameter Ratios

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Journal of Wuhan University of technology(materials Science) 2020年第3期35卷 506-513页

作者： TAN Lin HE Qianglong HU Lanxin TIAN Tian WANG Weimin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Silicon carbide ceramics with different thicknesses/diameter ratios were prepared by using ultra-fine silicon carbide powder with the sintering additives of 1.0 wt% boron and 1.5 wt% carbon. The influence of thickness/diameter ratio on the microstructure and density of SiC ceramics was investigated in detail. The experimental results show that the addition of boron and carbon sintering aids can promote the densification process of SiC ceramic, leading to the low sintering temperature and improve mechanical properties. At 1950 ℃, SiC ceramic with a density of 99% exhibits Young's modulus, hardness, and flexural strength of 476 MPa, 28.3 GPa, and 334 MPa, respectively. It is found that long holding time has a positive effect on the uniformity of the microstructure and density distribution of SiC ceramics with large thickness/diameter ratios. Additionally, the sintering additive of boron can solid-solve into SiC, and then facilitate the phase transformation of SiC to form 6H-SiC and 4H-SiC composite ceramics.

关键词： SiC large thickness/diameter ratios mechanical properties uniformity

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Vacancy-Based Defect Regulation for High Thermoelectric Performance in Ge9Sb2Te12-x Compounds

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ACS APPLIED materials & INTERFACES 2020年第17期12卷 19664-19673页

作者： Chen, Shuo Bai, Hui Li, Junjie Pan, Wenfeng Jiang, Xianyan Li, Zhi Chen, Zhiquan Yan, Yonggao Su, Xianli Wu, Jinsong Uher, Ctirad Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Physics University of Michigan Ann Arbor Michigan 48109 United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Defect engineering is the core strategy for improving thermoelectric properties. Herein, cation doping along with modulation of cation vacancy has been developed in GeTe-based materials as an effective method to induce vacancy-based defects to boost their thermoelectric performance. A series of ternary compounds of Ge9Sb2Te12-x (x = 0, 0.03, 0.06, 0.09, 0.12, 0.15) was prepared by vacuum-melting and annealing combined with the spark plasma sintering (SPS) process. The role of Sb doping and cation vacancy on thermoelectric properties was systematically investigated. It is found that alloying Sb2Te3 into GeTe increases the concentration of cation vacancies, which is corroborated by both positron annihilation measurements and theoretical calculations. The vacancies, stacking faults, and planar defect interactions determine the thermoelectric transport properties. Adjusting the deficiency of Te effectively tunes the concentration of cation vacancies and dopant defects in the structure. In turn, this tunes the carrier concentration close to its optimum. A high power factor of 32.6 mu W cm(-1) K-2 is realized for Ge9Sb2Te11.91 at 725 K. Moreover, large strains induced by the defect structures, including Sb dopant, vacancy, staking faults, as well as planar defects intensify phonon scattering, leading to a significant decrease in the thermal conductivity from 7.6 W m(-1) K-1 for pristine GeTe to Ge9Sb2Te11.85 at room temperature. All of the above contribute to a high ZT value of 2.1 achieved for the Ge9Sb2Te11.91 sample at 775 K.

关键词： GeTe-based compounds alloying with Sb2Te3 deficiency of Te stacking fault vacancy plane thermoelectric

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Molecular Engineering of g-C_(3)N_(4)with Dibenzothiophene Groups as Electron Donor for Enhanced Photocatalytic H_(2)-Production

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Chinese Journal of Structural Chemistry 2022年第6期41卷 48-54页

作者： Shanren Tao Sijie Wan Qinyang Huang Chengming Li Jiaguo Yu Shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The construction of donor-acceptor(D-A)molecular structure is an attractive strategy to enhance the photocatalytic performance of polymeric ***,dibenzothiophene(DBT)-4-carbaldehyde as the precursor is introduced into g-C_(3)N_(4)(TCN)prepared by two-step thermal polymerization to construct an intramolecular D-A type copolymer(TCN-DBT_(x)).DFT calculation and experimental results reveal that DBT plays the role of electron donor unit to modify g-C_(3)N_(4).The incorporation of DBT not only adjusts the band gap to improve reduction ability,but also induces an internal electric field with extendingπ-conjugated system for effective charge *** a result,TCN-DBT_(x)exhibits much better photocatalytic performance with an optimal hydrogen production rate of 3334μmol h^(-1)g^(-1),which is 2.5 times that of *** work provides a protocol for preparing high-performance g-C_(3)N_(4)-based photocatalysts toward various applications.

关键词： carbon nitride donor-acceptor photocatalysis charge transfer

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P-doped Germanium Nanowires with Fanobroadening in Raman Spectrum

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Journal of Wuhan University of technology(materials Science) 2016年第1期31卷 52-57页

作者：何亮 xiong biao zhou peng luo wen song peishuai wang xukun hao zhimeng yang xiao niu chaojiang tian xiaocong yan mengyu 麦立强 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The optimized growth conditions for high density germanium（Ge） nanowires and P-doped Ge nanowires on Si（111） substrate were investigated,the phosphorus（P）-doping in Ge nanowires was also *** liquid solid-low pressure chemical vapor deposition（VLS-LPCVD） of Ge nanowires was conducted with different thicknesses of Au film as catalyst,different flow rates of GeH4 as precursor and PH3/Ar as *** morphologies of the Ge nanowires were characterized by scanning electron microscopy（SEM）,the P-doping was verified by micro Raman spectroscopy via measuring the P local vibrational peak（342-345 cm^（-1）） and asymmetric broadening of Ge-Ge vibrational peak（about 300 cm^（-1）,*** characterization results show that 1 run thickness of Au catalyst is the most suitable condition among thicknesses of 0.1,1,5,and 10 nm for the growth of high density Ge nanowires at 300 and 350℃,and 0.5 sccm is the best flow rate of PH3/Ar to grow high density and large scale P-doped Ge nanowires among flow rates of 0.5,1 and *** P impurity can be doped into Ge nanowires effectively during LPCVD process at 350 ℃.

关键词： germanium nanowires LPCVD doping VLS

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synthesis of Ti_2AlC by hot pressing and its mechanical and electrical properties

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中国有色金属学会会刊：英文版 2007年第5期17卷 1001-1004页

作者：王苹梅炳初洪小林周卫兵 School of Science Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Ti2AlC bulk material was synthesized by hot pressing of mixture powders of TiC, Ti, Al and active carbon. The phase compositions of resultant product at different temperature were detected by X-ray diffractometer. The microstructures of the samples were observed by SEM. Finally, the mechanical properties and thermal properties of the sample at 1400 ℃ were measured. The results show that high purity Ti2AlC material with little Ti3AlC2 can be synthesized by hot pressing 0.5TiC/1.5Ti/1.0Al/0.5C at 1 400 ℃. Ti2AlC exhibits high mechanical properties and metallic electrical properties. Its fracture toughness is 7.0 MPa·m1/2, its flexural strength is 384 MPa at room temperature, and its electrical conductivity is 2.56×106 Ω1·m-1 at room temperature.

关键词：热压制 Ti2AlC 机械力学电工材料

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Fabrication of BiVO4：Effect of Structure and Morphology on Photocatalytic Activity and Its Methylene Blue Decomposition Mechanism

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Journal of Wuhan University of technology(materials Science) 2016年第4期31卷 791-798页

作者：郭敏娜 he qianglong wang wenjie wu jie 王为民 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

BiVO4 photocatalysts were synthesized by a surfactant free hydrothermal method without any further treatments,and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,ultraviolet-visible diffuse reflectance spectroscopy（UV-vis DRS）,Raman spectroscopy,and Brunauer-Emmett-Teller（BET） surface area *** photocatalytic activity was evaluated for the degradation of the methylene blue（MB） under visible light *** from the structural and morphological characterization,it is stated that the obtained samples present monoclinic phase,and the pH value has significant influence on the *** enhanced photocatalytic performance was associated with its crystallinity,unique morphology,band gap energy,BET specific surface area,surface charge and adsorption *** recycle experiments results show that the BiVO4 photocatalysts have excellent photo-stability,and we deduced a possible mechanism by examining the effects of the active species involved in the photocatalytic process for MB photocatalytic degradation.

关键词： photocatalytic surfactant hydrothermal visible crystallinity ultraviolet irradiation Brunauer tetragonal Teller

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