JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
·
IF 6.364
Cong Ji,Gang Chen,Jie Wang,Xue Bai,Zixuan Zhang,Chao Chen,Wei Cai,Rongli Gao,Xiaoling Deng,Chunlin Fu
In this paper, < 001 > -oriented ternary NBT-BY-STO textured ceramics were prepared by tape casting technique based on composition design and orientation engineering strategies. The introduction of BY greatly reduces the grain size and increases the breakdown field strength , resulting in the improvement of the energy storage density. The relaxation behavior and saturation polarization of the ceramics were enhanced by < 001 > -orientation engineering, and so significantly increased energy storage density and energy storage efficiency. Finally, the energy storage performance of NBT-based ceramics was improved obviously. When x = 0.3, the energy storage density reached 5.34 J/cm 3 , and the energy storage efficiency was 83.91%. The prepared textured ceramics have excellent temperature, frequency stability and charge-discharge characteristics. Therefore, < 001 > -oriented ternary textured ceramics prepared in this paper is a potential dielectric material for pulse powder device, and this strategy of optimizing the energy storage performance also provides guidance of energy storage performance regulation for dielectric energy storage materials .
研究领域:
材料科学
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能源存储
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Guancheng Shen,Yi Zhang,Yunming Wang,Wenjie Yu,Zhigao Huang,Maoyuan Li,Yun Zhang,Huamin Zhou
Polymer orientation is a fundamental and key issue, exhibiting crucial impacts on physical properties of polymeric parts. Current methods are limited in transparent materials and fail to measure the dynamic orientation in industrial polymer processing in situ . Herein, we reported an innovative strategy that dynamic orientation for polymer molecular chains was successfully characterized in situ by dielectric method. A key dielectric-orientation theoretical model was established, and a facile interdigital electrode capacitor (IDEC) array sensor was designed. The experimental results not only agreed well with the classic elastic dumbbell model and the traditional optical measurement method, but also showed a universal applicability for different polymer solutions and a good application prospect in injection molding process. Investigated results showed that the orientation difference of 1 wt% PVDF/DMF, 1 wt% PVC/DMF and 1 wt% PS/DMF solution was 0.57, 0.97 and 0.75 at shear rate 0–407 1/s, respectively. Additionally, the method was successfully applied in injection molding (Δε, 0.25–0.88 under shear rate 56.6–250 1/s). Our strategy built a new ‘decoding fingerprint’ to the dynamic orientation of polymer.
研究领域:
材料科学
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高分子物理
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhuo Tian,Jianning Lu,Xiaowei Feng,Bo Feng,Cuicui Yin,Yingfei Lin,Juan Wang
h-BN is a two-dimensional ceramic material with a lamellar structure , known for its typical orientation characteristics on mechanical and thermal properties. By optimizing the size and arrangement of h-BN grains in the matrix, the anisotropic characteristics of h-BN ceramics can be fully utilized to obtain ceramic materials with high thermal conductivity or high strength . In order to study the effect of grain orientation distribution on the mechanical and thermal properties of materials, the index of orientation distribution (IOP) was used to quantitatively characterize the orientation degree of h-BN grains and analyzed the effect of h-BN grain size on material properties . The results show when the initial h-BN size is 13.50 μm, the ceramic has the highest orientation degree/-507, and the mechanical and thermal properties show obvious anisotropy. While the related properties of BN-YAG ceramics varies significantly with the decrease of initial h-BN grain size.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2010
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IF 1.842
Z.X. Meng,Y.S. Wang,C. Ma,W. Zheng,L. Li,Y.F. Zheng
Electrospinning technique can be used to produce the three-dimensional nanofibrous scaffold similar to natural extracellular matrix, which satisfies particular requirements of tissue engineering scaffold. Randomly-oriented and aligned poly(lactic-co-glycolic acid) (PLGA) and PLGA/gelatin biocomposite scaffolds were successfully produced by electrospinning in the present study. The resulting nanofibrous scaffolds exhibited smooth surface and high porous structure. Blending PLGA with gelatin enhanced the hydrophilicity but decreased the average fiber diameter and the mechanical properties of the scaffolds under the same electrospinning condition. The cell culture results showed that the elongation of the osteoblast on the aligned nanofibrous scaffold was parallel to the fiber arrangement and the cell number was similar to that of randomly-oriented scaffold, indicating that the aligned nanofibrous scaffold provide a beneficial approach for the bone regeneration.
研究领域:
生物材料
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组织工程
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生物医学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Chenhan Zhang,Jiahui Yan,Taotao Ji,Dongying Du,Yanwei Sun,Liangliang Liu,Xiongfu Zhang,Yi Liu
Preferred orientation represents a main concern for microstructure control and performance optimization of MOF membranes. To date, it remains a challenging task to precisely control preferred orientation of ZIF-8 membrane. Herein, we prepared highly (110)-oriented ZIF-8 membrane by oriented secondary growth. Among various elements, preparation of uniform ZIF-8 nanosheet seeds through thermal conversion of identically shaped ZIF-L precursors, spin-coating-assisted oriented deposition of (110)-oriented ZIF-8 seed layer, and controlled in-plane secondary growth at low temperature were found crucial for obtaining well-intergrown (110)-oriented ZIF-8 membrane whose H 2 /CO 2 ideal selectivity exceeded H 2 /N 2 and H 2 /CH 4 under ambient conditions, owing to preferential CO 2 adsorption capacity of not only PEI but also ZIF-8 nanosheets compared with their bulk counterparts. Our research highlighted the significance of preferred orientation regulation in tailoring the gas permeation behavior of MOF membranes.
研究领域:
材料科学
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化学工程
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膜技术
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DOI
高影响因子
Materials
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2025
·Vol. 18
·期 8
·1747
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IF 3.2
Wei Xu,Yedi Li,Tingjun Wu,Yu Duan,Lei Zhu,Qiang Liu,Yiying Wang,Wenjie Yu
Copper interconnect technology faces limitations due to the electron’s mean free path and electromigration, driving the adoption of cobalt alternatives. This study proposes a novel mechanism to achieve superfilling by tuning the adsorption energy of additive molecules on cobalt surfaces. The adsorption energies of additives are tailored by changing molecular structures with different functional groups. Computational results reveal that carbon–carbon triple bonds critically strengthen adsorption, while ether bonds further enhance binding on distinct cobalt crystallographic planes. Specifically, 1,4-bis(2-hydroxyethoxy)-2-butyne (BEO) containing both triple bonds and ether groups exhibits the highest adsorption energy (−22.62 eV). Replacing ether with hydroxyl groups in 2-butyne-1,4-diol (BOZ) reduces the adsorption energy to −10.39 eV, while eliminating triple bonds in 1,4-butanediol diglycidyl ether (BDE) further decreases it to −8.43 eV. Experimental studies demonstrate that BOZ and BEO preferentially adsorb on the (101) and (110) planes of hexagonal close-packed cobalt (HCP-Co) due to their differential adsorption energies. This selective suppression promotes preferential growth along the densely packed (002) orientation. This leads to a trench-filling process dominated by the most densely packed plane, resulting in better electrical performance. Superfilling is achieved when molecular adsorption energies are in the range of 5–8 eV. The work establishes a functional group design strategy to regulate additive adsorption, enabling crystallographic control for advanced cobalt electrodeposition processes.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Qiannan Liu,Chao Bi,Honghai Hu,Zhenzhen Zhang,Bing Zhang
Three-dimensional (3D)-printed intestinal stents based on thermoplastic starch (TPS)/polylactic acid (PLA) are a promising biodegradable alternative to conventional metal stents. However, the influence of the structure and conformation of starch on the properties of 3D-printed TPS/PLA intestinal stents requires clarification. This study evaluated the effects of the amylose/amylopectin ratio of starch on the molecular orientation, molecular interactions, crystallization behavior, microstructure, and thermodynamic, mechanical and hydrolysis performance of 3D-printed TPS/PLA intestinal stents. The molecular orientation of starch was determined during the preparation of the filaments for 3D printing. The 3D printing process promoted intermolecular interactions by further improving the molecular orientation, and enhanced the short-range order and crystallinity of the starch molecules. Decreasing the amylose/amylopectin ratio enhanced the short-range order of the starch molecules by increasing molecular orientation, which improved the circumferential compression performance of the 3D-printed intestinal stents but not the axial compression performance. However, the reduction in plasticized starch particles and improved PLA continuity caused by decreasing the amylose/amylopectin ratio contributed to improving the circumferential and axial compression performance as well as the anti-hydrolysis performance. These findings highlight the potential of starch to replace PLA as an inexpensive raw material for the development of high-performance biodegradable 3D-printed intestinal stents.
研究领域:
生物材料学
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医学工程
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食品科学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Feng Hu,Zonghua Wang,Zhipeng Xie
With the advancement of power electronics, packaging materials are facing more stringent requirements, especially in mechanical reliability and thermal conductivity. Silicon nitride (Si 3 N 4 ) ceramics are promising due to their excellent mechanical properties, but their relatively low thermal conductivity limits wider applications. In this study, we propose a dual strategy of optimizing sintering aids during hot-press sintering to facilitate convenient regulation of β -Si 3 N 4 crystal-axis orientation, and applying heat treatment to enhance thermal conductivity while retaining excellent mechanical properties. The results show that the composition ratio of MgSiN 2 -Y 2 O 3 composite sintering aids significantly influences the crystallographic orientation (Lotgering orientation factors ranging from 0.19 to 0.29) and the anisotropy in thermal conductivity, with the aligned direction exhibiting a ∼24% higher thermal conductivity than the non-aligned direction. Post-sintering heat treatment at different temperatures further improved the grain boundary structure, leading to an additional ∼17% increase in thermal conductivity while maintaining high flexural strength (>800 MPa). This approach enables the effective tuning of grain alignment and boundary characteristics, balancing thermal and mechanical performance. The findings offer a new pathway for developing high thermal conductivity Si 3 N 4 ceramics, expanding their potential for high-power electronic packaging applications.
研究领域:
材料科学
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陶瓷材料
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电子封装
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热管理
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微观结构工程
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产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 9
·1795
·
IF 4.324
Junping Ding,Huanchun Wang,Yidong Luo,Yushuai Xu,Jinsheng Liu,Ruichu Lin,Yuchen Gao,Yuanhua Lin
In work, (002) oriented flower-like Bi2O2CO3(BOC) composites are synthesized by a facile chemical route and carbon quantum dots (CQDs) are modified on their surfaces through a hydrothermal method. The synthesized samples (CQD/BOC) are characterized by X-ray diffraction (XRD), SEM, X-ray photoelectron spectroscopy (XPS), UV-Vis diffuser reflectances (DRS), BET and TEM/HRTEM. The morphologies of CQD/BOC composites are the flower-like shapes, the irregular flaky structures and the fine spherical particles of CQDs attached. Photocatalytic performances were investigated in terms of removing gaseous toluene at a concentration of 94.3ppm in air, with the assistance of CQD/BOC under artificial irradiation. Our results show that CQDs modified (002) oriented Bi2O2CO3exhibits good photocatalytic activity for toluene decomposition, which can be attributed to the enhanced efficient charge separation. A certain ratio composite photocatalyst (BOC-CQD-15) shows a toluene removal rate of 96.62% in three hours, as well as great stability. CO2was verified to be the primary product. The oriented flower-like Bi2O2CO3with carbon quantum dots on the surface shows great potential in the field of solar driven air purification.Keywords:Bi2O2CO3;carbon quantum dots (CQDs);crystal orientation;toluene removal;photocatalysis
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2015
·Vol. 18
·期 5
·3884-3892
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IF 4.493
Xinyuan Che,Shiming Gong,Heng Zhang,Bin Liu,Yinghan Wang
Polyimides (PI-N9 and PI-N12) were synthesized from two kinds of functional diamines, whose junction modes between backbones and side chains were different. Side chains of PI-N9 were linked to the backbones with an ether bond spacer; and side chains of PI-N12 were directly linked to the backbones without any spacer. The PI alignment layer surfaces were investigated by atomic force microscopy, surface free energy measurements, X-ray photo-electron spectroscopy and polarized attenuated total reflection Fourier transformed infrared spectroscopy. It was found that PI-N9 lost the vertical alignment capability after high-strength rubbing, while PI-N12 could still induce liquid crystals (LCs) to align vertically under the same condition. The mechanism of the macroscopic molecular orientation of the PI surface is proposed. During the high-strength rubbing process, the side chain could rotate around the flexible ether bond which existed between the side chain and the main chain of PI-N9 and then fell over. Therefore, PI-N9 could not induce the vertical alignment of LCs anymore. But PI-N12 could keep LCs aligning vertically all the time, which proved that the stability of LC alignment induced by PI-N12 was better.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yunqi Fang,Yang Sun,Bing Guo,Hangyan Shen,Ruirui Yang
Materials with oriented structures exhibit excellent mechanical, electrical, and tribological properties. In this study, WS 2 films with a preferred orientation along the (002) plane were prepared using shear flow technology, and the influence of polyvinyl alcohol (PVA) concentration and wedge angle on the oriented structure of the WS 2 films was systematically studied. The results indicated that the diffraction peak intensity ratio of the (002) and (103) planes of the WS 2 films (I (002) /I (103) ), increased from 46.68 to 116.11 when the PVA concentration increased from 5 to 25 g/L. When the wedge angle increased from 5° to 40°, I (002) /I (103) showed a similar trend, increasing from 80.99 to 347.22. Thus, the higher I (002) /I (103) value confirmed a preferred (002) plane orientation of WS 2 in the films, indicating that an increase in PVA concentration and wedge angle significantly enhanced the shear stress of the slurry. Under shear stress, the WS 2 particles had a tendency to orient along the shear stress direction, forming a preferred (002) plane-oriented structure. Therefore, this research may provide theoretical and technical support for preparing preferred orientation 2D materials .
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Pengcheng Wang,Xuqi Lin,Houlin Cheng,Ciqi Yuan,Yongping Zheng,Yingbin Lin,Zhigao Huang,Hao Chen,Jiaxin Li
Na 3 V 2 (PO 4 ) 3 (NVP) is a promising electrode material that exhibits magnetic anisotropy; however, the potential of this magnetic anisotropy to optimize battery performance has been largely unexplored. This study proposes a cost-effective and efficient method to induce the alignment of NVP along the (113) crystal plane by applying a vertical magnetic field during the slurry coating process, thereby enhancing its battery performance. Comprehensive structural characterizations and theoretical analysis elucidate the structure-activity relationship between the preferred crystal orientation and ion transport kinetics, facilitating the formation of more ordered Na + deintercalation pathways in NVP electrodes. This alignment reduces electrode tortuosity, enhances interfacial compatibility, and substantially improves battery performance, particularly in terms of high-rate cycling capability. As a result, the magnetic-field-modulated NVP (NVP−M⊥) electrode exhibits a high capacity retention of 85.1% after 500 cycles at 5 C, significantly surpassing that of the pristine electrode. The NVP−M⊥ electrode also demonstrates considerable reversible capacity at 40 C and maintains excellent stability under high temperature and prolonged cycling conditions. Furthermore, superior battery performance is observed in the assembled NVP−M⊥||hard−carbon pouch cell and commercial NVP electrode following magnetic-field modulation, thereby validating the efficacy of this method. Consequently, this magnetic-field-induced crystal-orientation optimization strategy provides an innovative approach for low-cost and high-throughput preparation of high-performance sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）