INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Jingren Li,Ronghua Peng,Wei Li,Shilin Guo,Yanbo Liu,Zhenkai Cen,Dandan Han,Songgu Wu,Junbo Gong
As one of the eight essential amino acids in the human body, l-isoleucine plays an important role in human life metabolism and can be applied as a nutritional supplement and food additive in the food field. However, the crystallization of l-isoleucine is generally flaky with poor powder properties, such as bulk density and flowability, which is not conducive to a wide range of industrial applications. In this study, we successfully prepared large spherical particle crystals via two different ways of crystallization. l-Isoleucine undergoes the evolution from initial round flakes to three-dimensional petal-like structures and finally to spherical particles by evaporation crystallization in the presence of hydroxypropylmethylcellulose (HPMC). l-Isoleucine also aggregates into spherical particles in the acid–base reaction crystallization process by adding a small amount of suitable and volatile bridging liquids, such as cyclohexane and ethyl acetate. In conclusion, both approaches improved the crystal properties of l-isoleucine and produced spherical particles with a larger particle size, higher bulk density, and higher compression resistance, thereby providing new insight into the preparation of high-quality l-isoleucine.
研究领域:
食品科学
·
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Hailong Li,Yingjie Chen,Lijian Leng,Yingchao Hu
Reliable energy storage technology is a prerequisite for the efficient utilization of solar energy, among which thermochemical energy storage based on calcium looping emerges as a promising candidate. In this work, antisintering Y2O3 was doped into CaO to prepare a novel composite for energy storage. Benefiting from the homodispersity of Y2O3 in active CaO, which was proved by both scanning electron microscopy and transmission electron microscopy analyses, the novel composite exhibited high energy storage density and excellent cyclic stability. 35 wt % is considered as the optimal addition amount of Y2O3 because of its highest energy storage density of 1986 kJ/kg after 10 cycles. CaY35 not only showed outstanding extended cyclic performance but also maintained a satisfactory energy storage density of about 1400 kJ/kg under harsh calcination conditions due to its increased Brunauer–Emmett–Teller specific surface area and enriched porosity through the N2 adsorption analysis. In addition, the extrusion-spheronization method was employed to granulate CaY35 powders into spherical pellets. The extrusion force during the granulation process led to the destruction of the sorbent structure to some extent, resulting in a slight decline in pellet performance. However, the granulation endowed the pellets with excellent mechanical strengths and they lost only 4.28 wt % of their initial mass after 7000 rotations in a fragility tester, which was of great significance for their cyclic practical applications.
研究领域:
能源材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
·
2016
·Vol. 26
·期 7
·075011
·
IF 1.768
Zhanxiao Kang,Tiantian Kong,Leyan Lei,Pingan Zhu,Xiaowei Tian,Liqiu Wang
The controlled generation of microparticles with non-spherical features is of increasing importance. Such particles are useful for fundamental studies in areas such as self-assembly, as well as biomedical applications from drug carriers to photonic devices. We propose a simple model that captures the dominating factors controlling the size and morphology of non-spherical particles from phase separated droplets. The validity of our model is verified by comparing the generated non-spherical microparticles by droplet microfluidics. This simple relationship between the dominating factors and the final morphologies enables the production of non-spherical particles with well-defined shapes and tightly-controlled dimensions for a variety of applications from drug delivery vehicles to structural materials.
研究领域:
材料科学
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生物医学工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 6
·6188-6192
·
IF 1.798
Wu Yeqiu,Jin Guangya,Liu Zhijian,He Tao
Y 2 O 3 :Eu 3+ and Y 2 O 3 :Eu 3+ /Bi 3+ particles with spherical morphology are synthesized by microwave-assistant hydrothermal process. The results show that cubic phase Y 2 O 3 :Eu 3+ and Y 2 O 3 :Eu 3+ /Bi 3+ particles with uniform size and spherical shape are obtained. The doping Eu 3+ and Bi 3+ ion have no influence on the phase and morphology of samples. In the hydrothermal process, the fast and homogeneous microwave heating benefits the formation of samples with uniform size and spherical shape. Both Y 2 O 3 :Eu 3+ and Y 2 O 3 :Eu 3+ /Bi 3+ show dominant red emission originating from the 5 D 0 → 7 F 2 transition of Eu 3+ . The codoping Bi 3+ can enhance the intensity of Eu 3+ emission.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 1
·16-23
·
IF 3.9
Shuo Zhao,Songmo Du,Siyuan Sun,Fei Li,Zhanglin Chen,Shijia Zhang,Xiaoshan Ning,Wenbin Cao,Kexin Chen,Konstantin Smirnov,Jie Zhang,Guanghua Liu
β-Si 3 N 4 powder with well-dispersed spherical particles was synthesized by liquid-phase modified carbothermal reduction and nitridation. The influence of the type and content of additives on the particle morphology was investigated. The liquid phase formed at the reaction temperature modifies the morphology of the Si 3 N 4 powder. The Si 3 N 4 products precipitated along the liquid-solid interface, thus forming a spherical morphology and promoting the transformation from α-Si 3 N 4 to β-Si 3 N 4 . The type of additives has a strong influence on the formation temperature and viscosity of the liquid phase and hence affects the product morphology. In the samples with CaF 2 and CaO additives, sufficient liquid phase occurred and spherical particles were obtained. In the sample with Y 2 O 3 , however, the liquid phase was insufficient due to the higher formation temperature, thus resulting in an irregular particle morphology.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Junbo Ren,Mingda Huo,Pengbo Liu,Ying Tan,Minghui Li,Wei Gao,Xiaohong Sun,Ruisong Guo,Xinqi Zhao
Spherical α-alumina powder has been widely used in advanced alumina ceramics manufacturing due to its excellent sphericity, uniform particle size distribution and good dispersion. However, the small size and fast growth rate of α-alumina precursor particles lead to strong agglomeration during grain growth, making it difficult to obtain uniformly dispersed α-alumina particles with good sphericity. In this study, polyethylene glycol 2000 (PEG2000) and poly (ammonium acrylate) (PAA-NH 4 ) were used as composite dispersants to decrease agglomeration during the preparation of alumina precursors. When the contents of PEG2000 and PAA-NH 4 were 0.5 g L −1 and 0.06 g L −1 (S4), respectively, uniformly dispersed alumina precursor particles with good sphericity and a particle size of about 506 nm were obtained, and the morphology remained stable after calcination. After molding and sintering the calcined powders, alumina ceramics with superior mechanical properties were produced. Compared to commercial α-alumina ceramics, flexural strength is increased by approximately 28.9 %, while fracture toughness is increased by approximately 29.2 %. This study offers a new foundation for the development of high-performance alumina powders and ceramics, supporting their engineering applications.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Fanrong Ai,Jinchao Yan,Hong Ruan,Jiawei Zou,Wenchao Chi,Chuanliang Cao,Wenchao Li,Kui Zhou
Extrusion dripping is a facile method for the preparation of millimetre-size macrobeads. In this work, a pneumatic extrusion dripping system has been established to fabricate hydroxyapatite macrobeads with a controlled size. The size of the hydroxyapatite spherical beads could be tailored by adjusting the dripping parameters. This work is believed to provide an alternative method for the fabrication of hydroxyapatite macrobeads that can be used in bone regeneration.
研究领域:
生物材料学
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Long Ma,Changlei Qin,Shuai Pi,Henan Cui
Li 4 SiO 4 is a promising solid sorbent for high-temperature CO 2 capture due to the high and stable CO 2 adsorption performance. It is required to possess good mechanical properties in practical fluidized-bed systems and pelletization is necessary. However, pelletization generally results in a large decline in the CO 2 uptake or a continuous loss-in-capacity of Li 4 SiO 4 sorbents in cyclic reactions. In this work, three kinds of Li 4 SiO 4 powders were synthesized and screened, and spherical pellets were further prepared via an extrusion-spheronization technique using polyethylene as a pore-former to develop porous microstructure. Then sorbent pellets were systematically tested on the CO 2 adsorption performance, compression strength and attrition resistance. Results shows that the pellets modifying with 20 wt% polyethylene reach and stabilize a CO 2 sorption capacity of 0.31 g CO 2 /g sorbent in the whole 40 tested cycles under typical conditions, which is even higher than that in powder form. Moreover, the pellets are observed to have an outstanding compression strength (27.5 MPa after calcination) and an excellent attrition resistance (only 1.01 wt% mass loss in 10 h-attrition test), which are both far more better than sorbents reported in the literature. The simultaneous physiochemical performances indicate that the prepared Li 4 SiO 4 sorbent pellets could be suitable for high temperature CO 2 capture in fluidized-bed reactors.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 163
·期 3
·G26
·
IF 3.266
Binbin Huang,Jie Chen,Shuzhong Zhan,Jianshan Ye
Here we report a novel approach to synthesize Schiff base metal complex with different shape and size on conductive substrate by electrochemical deposition. Deposition can be microrod clusters or octahedral particles or spherical particles through different electrolytic experimental conditions. UV–visible spectroscopy and cyclic voltammetry were used to study the mechanism of the electrodeposited process. The deposition was characterized by scanning electron microscopy (SEM), high resolution mass spectrometer (HRMS), infrared spectroscopy, UV–visible spectroscopy and X-ray photoelectron spectroscopy (XPS). The microrod clusters and octahedral particles/spherical particles are confirmed to be Schiff base cobalt complexes corresponding to CoL and H2CoL2, respectively (H2L: Bis[Salicylydene]-1,2-Iminophenylenediamine). A probably two-step mechanism of the electrodeposited process had been established and a three-dimensional nucleation model is proposed.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Silicon
·
2019
·Vol. 12
·期 3
·585-594
·
IF 1.21
Wang Qikun,Wang Yongqing,Chang Qibing,Liu Han,Yang Yulong,Zhang Xiaozhen
To obtain the ultrafine pigment for ink-jet printing, ultrafine spherical Pr-ZrSiO 4 pigment was prepared by sol-gel-microemulsion method (S-G-M). In the emulsion, ZrO 2 and SiO 2 sols are used as water phase, cyclohexane serves as oil phase, Triton X-100 and 1-hexanol are chosen as surfactant and co-surfactant, respectively. The results show that without the introduction of demulsifier, the sol/oil microemulsion system is demulsified automatically due to the transformation of liquid/liquid to solid/liquid interface following the transformation from sol to gel. The obtained Pr-ZrSiO 4 pigment owns uniform spherical particles with the average particle size of about 0.785 μm, which is suitable for the ink-jet printing. The CIE coordination of the pigment is L* = 87.63, a* = −3.82, b* = 65.68, which shows bright lemon yellow. Hence, the ultrafine pigment in this work has the good application prospects.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2018
·Vol. 43
·期 7
·637-641
·
IF 1.749
Naimeng Song,Jianchao Liu,Guoying Zhang,Zhenzhan Yan,Hongxu Gao,Li Yang
This paper describes the preparation of two combustion catalysts Tannin-Fe (Ta−Fe) and Phloroglucinol-Fe (Ph−Fe) by spray drying. The particle size and morphology of the particles are observed by scanning electron microscopy (SEM). The results of SEM image show that the particles are regular spherical and very good dispersion. The diameter of most spherical particles is about 1 μm. The effects of Ta−Fe and Ph−Fe on the thermal decomposition of RDX and AP were tested by differential scanning calorimeter (DSC). DSC dates show that Ta−Fe and Ph−Fe can advance the high temperature exothermic peak of AP 18.0 °C and 16.1 °C, respectively. The burning rates illustrates that both Ta−Fe and Ph−Fe can significantly increase the combustion rate of HTPB propellants. The formulation with 2 mass% Ta−Fe shows an average 21.31 % increase in burning rate and has a low value of the exponent n=0.48. The formulation with 2 mass%Ph−Fe has a burning rate 20 to 60 % larger than that of the initial AP/HTPB/Al formulation, and has a lowest exponent n=0.45.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
Small Science
·
2025
·
IF 8.3
Yanan Li,Jie Teng,Qiuting Chen,Qingze Fan,Hiroyuki Oku,Guanghui Ma,Jie Wu
Adjuvants based on spherical particles and stabilized Pickering emulsions represent a significant area of research in the adjuvant field. However, the immune effects of adjuvants containing nonspherical particles and their stabilized Pickering emulsions remain largely unexplored. Particle shape plays a critical role in influencing particle–cell interactions and antigen storage efficiency. In this study, it is aimed to synthesize nonspherical particles with diverse morphologies and sizes and successfully utilize one type to stabilize Pickering emulsions. In this research, their immunological effects are further evaluated by examining the activation of antigen-presenting cells (APCs) and their impact on both cellular and humoral immunity. In these findings, it is demonstrated that nonspherical particles extend the in vivo residence time of vaccines and enhance APCs activation, thereby improving cellular immunity. Additionally, Pickering emulsions stabilized by nonspherical particles exhibit superior flexibility, higher antigen uptake by APCs, and more robust APCs activation compared to those stabilized by spherical particles. These advantages ultimately result in enhanced humoral and cellular immune responses.
研究领域:
免疫学
·
药剂学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）