CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Man Wang,Jianqiang Xiao,Jian Zhang,Lei Zhao,Yingdan Song,Zhichao Liu,Ting Wang,Xuhui Xu,Jie Yu
Mechanoluminescence (ML) materials have the ability to emit light under mechanical force, allowing for visible mechanical force distribution and making them valuable for applications in smart textiles and wearable sensors. Detecting the force rate is crucial for applications, such as haptic feedback devices and mechanical monitoring, but visualizing the speed of strain has not been achieved yet. In this study, we have successfully visualized the strain rate by monitoring the ML tailing lengths of red, green, and blue (RGB) ML materials, including CaF 2 : Tm 3+ , CaF 2 : Eu 3+ , and CaF 2 : Tb 3+ phosphors. These materials exhibit varying ML tailing lengths at identical rotation speed of friction force, due to their distinct lifetime of the emitting centers. By incorporating these RGB ML phosphors into a composite film, the discrepancies in ML tailing lengths across different colors become visible, with these differences becoming more pronounced as the rotation speeds rise. Ultimately, the visualization of rotational speed in bearings was achieved successfully based on the vivid color changes in the ML tailing length at different speeds.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
·
2015
·
IF 2.128
Abubakr Musa,Ming Miao,Mohammed A.A. Gasmalla,Tao Zhang,Ahmed Eibaid,Waleed Aboshora,Bo Jiang
In this study, effect of shaking velocity on mono-glycosyl-stevioside production by Leuconostoc citreum SK24.002 alternansucrase acceptor reaction was investigated, with four different level of shaking velocity (75, 100, 125 and 150 rpm) up to 24 h at 25 °C, using sucrose as donor and stevioside as acceptor. The results revealed that mono-glycosyl-stevioside yield significantly increased with increase in the reaction shaking velocity and reached maximum yield of 3.78 ± .02 mg/mL at 150 rpm shaking velocity after 6 h of reaction. And an increase in the reaction shaking velocity up to 150 rpm reduced the final reaction time and increased the productivity of mono-glycosyl-stevioside product such that the high quantity of mono-glycosyl-stevioside product was produced in only 6 h rather than 24 h. The mono-glycosyl-stevioside product was completely separated using macroporous resin AB-8 flowed by semi-preparative HPLC. Macroporous resin AB-8 showed high selectivity and capacity toward mono-glycosyl-stevioside. The structure of mono-glycosyl-stevioside was characterized, as 13-{[α- d -glucopyranosyl-(1→6)-β- d -glucopyranosyl-(1→2)-β- d -glucopyranosyl]oxy}kaur-16-en-19-oic acid β- d -glucopyranosyl eater, a corroding to extensive 1D and 2D NMR (1H and 13C, COSY, HSQC, HMBC) and mass spectral data.
研究领域:
生物化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 12
·4397
·
IF 3.4
Siyuan Yang,Fei Wang,Zhe Zhang,Zhiming Liu,Jiliang Zhang,Kaiyong Jiang
Electromagnetic (EM) wave absorption performance is greatly affected by the microscopic morphology of the absorbing material particles. In this study, a facile and efficient ball-milling method was applied to increase the aspect ratio of particles and prepare flaky carbonyl iron powders (F-CIPs), one of the most readily commercially available absorbing materials. The effect of ball-milling time and rotation speed on the absorption behaviors of the F-CIPs was investigated. The microstructures and compositions of the F-CIPs were determined using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The EM parameters were measured using a vector network analyzer (VNA) in the frequency range of 2–18 GHz. The results indicated that the ball-milled flaky CIPs exhibited a better absorption ability than the raw spherical CIPs. Among all the samples, the sample milled at 200 r/min for 12 h and the sample milled at 300 r/min for 8 h showed remarkable EM parameters. The ball-milling sample with 50 wt.% F-CIPs had a minimum reflection loss peak of −14.04 dB at a thickness of 2 mm and a maximum bandwidth (RL < −7 dB) of 8.43 GHz at a thickness of 2.5 mm, a result that conformed with the transmission line theory. Hence, the ball-milled flaky CIPs were considered to be beneficial for microwave absorption.Keywords:carbonyl iron powders;absorption performance;ball-milling time;ball-milling rotation speed;electromagnetic parameters
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 5
·939
·
IF 5.3
Qinghao Qin,Xia Cao,Ning Wang
Triboelectric nanogenerators have attracted extensive attention in energy harvesting due to its light weight, low cost, high flexibility, and diversity of function. However, deterioration in terms of mechanical durability and electrical stability of the triboelectric interface during operation, which are the results of material abrasion, severely limits their practical applications. In this paper, a durable triboelectric nanogenerator inspired by a ball mill was designed by using metal balls in hollow drums as carriers for charge generation and transfer. Composite nanofibers were deposited onto the balls, increasing the triboelectrification with the interdigital electrodes in the inner surface of the drum for higher output and electrostatic repulsion to each other for lower wear. Such a rolling design cannot only increase mechanical durability and maintenance convenience, where the filler can be easily replaced and recycled but also collect wind power with the decreased wearing of materials and sound efficiency in comparison with the typical rotation TENG. In addition, the short circuit current shows a strong linear relationship with the rotation speed in a wide range, which can be used to detect wind speed, thus showing potential applications in distributed energy conversion and self-powered environmental monitoring systems.Keywords:triboelectric nanogenerator;wind energy;low wear;rotation speed;self-powered sensor
研究领域:
能源材料
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Micromachines
·
2023
·Vol. 14
·期 9
·1741
·
IF 3.4
Jiayou Mou,Chenxi Wang,Hongyi Zhao,Chuwei Xiong,Yong Ren,Jing Wang,Dan Jiang,Zansheng Zheng
Nickel sesquioxide (Ni2O3) nanoparticles were synthesized using centrifugal microfluidics in the present study. The obtained nanoparticles were characterized using SEM to investigate their morphology and microstructure, and XRD was employed to analyze their purity. The nanoparticle size data were measured and analyzed using ImageJ (v1.8.0) software. The flow process and mixing procedure were monitored through computational fluid dynamics simulation. Among the synthesized Ni2O3nanoparticles, those obtained at the rotation speed of 1000 rpm for 10 min with angular acceleration of 4.2 rad/s2showed the best performance in terms of high purity, complete shape and microstructure, small diameter, and narrow diameter distribution. The experimental results demonstrate that the rotation speed of the microfluidic chip and reaction time contribute to a decrease in particle diameter and a narrower diameter distribution range. In contrast, an increase in acceleration of the rotation speed leads to an expanded nanoparticle size range and, thus, a wider distribution. These findings contribute to a comprehensive understanding of the effects exerted by various factors in centrifugal microfluidics and will provide new insights into nanoparticle synthesis using centrifugal microfluidic technology.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2015
·Vol. 22
·期 5
·1357-1362
·
IF 1.108
Yin Liuyan,Zhou Xingui,Yu Jinshan,Wang Honglei
A planetary ball-milling foaming route was employed by the protein foaming method for preparing silicon nitride (Si 3 N 4 ) foams. In comparison with the commonly used tumbling foaming route of protein foaming method, pores of the Si 3 N 4 foams fabricated by this new foaming route are more uniform in size distribution and the pores pack more compact. Furthermore, effects of the rotating speed on the structure and the property of the Si 3 N 4 foams fabricated by this new foaming route were investigated. It was indicated that the average pore size decreased with the rotating speed, whereas the count of windows on the walls increased with the rotating speed. Moreover, the windows were found to have a negative influence on the phase transformation of Si 3 N 4 from α phase to β phase.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Yibo Zhao,Lu Chang,Yueyang Li,Wenjing He,Keling Liu,Minjie Cui,Muhammad Usman Hameed,Jiyan Xie
Oxygen can generate reactive oxygen species in photocatalysis , promoting organic matter's mineralization. Therefore, enhanced oxygenation of the photocatalytic degradation system will help improve photocatalytic degradation efficiency. This study developed a novel high-gravity photocatalytic degradation method, which leverages the robust gas–liquid mass transfer capability of a supergravity rotating bed to realize the enhanced oxygenation of the photocatalytic degradation system. Specifically, this study used graphitic carbon nitride as the catalyst and tetracycline hydrochloride as the model pollutant. The effects of packing thickness, catalyst concentration, liquid flow rate, rotor speed , gas flow rate, and initial pH value on photocatalytic degradation performance were investigated. The results showed that the degradation rate of tetracycline hydrochloride reached 84.6 % under the optimal conditions of the rotating packed bed, which was 14.8 % higher than that of the traditional photocatalytic degradation process.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Shuang Qin,Tong Meng,Yu Wang,Yundong Wang,Changyuan Tao,Qian Zhang,Bing Li,Zuohua Liu
s: In response to the accelerating demands of industrial development, the scale-up of stirred reactors has become increasingly prevalent. Multi-shaft stirred reactors have emerged as a promising solution; however, a critical challenge remains in achieving efficient mixing while simultaneously minimizing energy consumption. Here, a novel approach based on differential rotation speeds to optimize mixing performance was proposed. Results demonstrate that a carefully configured rotation speed difference significantly enhances mixing efficiency, reducing mixing time by 17.89% and power consumption by 12.07%. This strategy not only amplifies flow field instability but also minimizes instability discrepancies, promoting a more uniform distribution of vortices across various scales. Furthermore, under this approach, the bottom impeller has the strongest impact on mixing, while the middle and lower impellers synergistically strengthen the weaker mixing regions and facilitate the redistribution of energy in the flow field. This method promotes efficient energy transfer from large-scale to small-scale vortices, ultimately improving overall mixing performance. This work offers a promising avenue for the optimal design and operation of multi-shaft stirred reactors, advancing both efficiency and energy sustainability.
研究领域:
化学工程
·
流体力学
·
过程优化
·
能效
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Edidiong Joseph Bassey,Jun-Hu Cheng,Da-Wen Sun
Effects of tray rotation speeds (TRS: 0, 20, 40 rpm), temperatures (50, 60, 70 °C) and wavelength spectra (mid and near-infrared) were comparatively evaluated on improving drying kinetics, physicochemical properties and bioactive content of red dragon fruits. Results indicated that successive increases in TRS and temperature led to significant reductions in drying time and increases in drying rates and moisture diffusivity. High TRS (40 rpm) and lower temperatures (50, 60 °C) also improved colour, total soluble solids, rehydration ratio, total phenolics and flavonoid contents, betalain content and antioxidant activity. Meanwhile, NIR drying presented a more energy-efficient approach, but with substantial reductions in quality properties compared with MIR drying. Overall, the results suggested the importance of wavelength absorption properties of plant tissues and potential avoidance of localized overheating for enhanced efficiency during infrared drying and prompted the development of suitable approaches and optimization studies for improving efficiency.
研究领域:
食品科学
·
农业工程
·
采后技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zhongkai Wu,Ru Wang,Chuang Yu,Chaochao Wei,Shuai Chen,Cong Liao,Shijie Cheng,Jia Xie
Sulfide electrolytes show great potential as solid electrolytes for all-solid-state batteries due to their high ionic conductivity and low interfacial resistance toward electrode materials. The structure of the P–S framework in the composition of sulfides plays a crucial role in the conductivity. Introducing LiI in the Li3PS4 structure can tailor the P–S frameworks and thus achieve high ionic conductivities. Herein, the dopant of LiI is optimized by high-rotation milling, followed by a sintering route to achieve the highest Li-ion conductivity of 2.3 mS cm–1 for the Li3PS4-50% LiI electrolyte (also denoted as Li7P2S8I) among different compositions. The phase variations and structure evolution of the P–S frameworks in the LiI-doped Li3PS4 electrolytes are carefully investigated in a combination of X-ray diffraction and Raman spectra. All-solid-state Li–S batteries using the prepared Li7P2S8I electrolyte combined with a nano Li2S cathode and a Li–In anode deliver a high initial discharge capacity of 739.7 mA h g–1 and sustain a discharge capacity of 517.7 mA h g–1 after 60 cycles with a capacity retention of 70.0% at 0.13 mA cm–2 at room temperature. When the operating temperature rises to 60 °C, it shows a higher discharge capacity of 862.8 mA h g–1 with fast capacity decay. However, it exhibits stable capacities and superior cycling performance under 0 °C over 70 cycles. Electrochemical impedance spectroscopy and in situ stack-pressure results find that the electrochemical performance differences of the assembled battery at different operating temperatures are associated with the interfacial resistance caused by volume changes. This work provides the strategy to obtain highly conductive sulfide electrolytes for SSBs and unravels the temperature effects on the electrochemical performance of all-solid-state Li–S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）