crystal morphology
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Author(s):  
Xiaochen Wang ◽  
Da Ma ◽  
Yingwei Liu ◽  
Ying Wang ◽  
Chaoying Qiu ◽  
...  

Oleogelation is an efficient way to structure oil and reduce saturated fatty acids of lipid products. Multi-component gels are of particularly interest attributed to the ability to tune gel properties by alteration of the component proportions. In this study, monoacylglycerol (MAG) and diacylglycerol (DAG) are used as gelator mixture and the influence of the ratio of these two crystalline particles on the characteristics of oleogels was investigated. The crystallization and melting behavior, solid fat content (SFC), crystal morphology, polymorphism and mechanical properties of the oleogels were characterized. The oleogels with higher gelator level displayed higher oil binding ability and shorter crystal formation time. The oleogels with higher MAG ratio exhibited more blade-like crystals, and the mixed oleogels with MAG: DAG of 3:7 and 5:5 showed altered crystal morphology with finer crystal size and reduced crystallization enthalpies possibly due to the increased nucleation seeds promoted by MAG. The oleogels with high MAG level showed lower equilibrium SFC during isothermal crystallization but faster crystallization rate, higher hardness and elasticity. Therefore, by changing the ratio of DAG with MAG, the crystallization profile and rheological properties of oleogels can be tailored and used as traditional solid fat substitutes in lipid-based products.


Author(s):  
Bin Yang ◽  
Yifu Wang ◽  
Longtai Li ◽  
Biao Gao ◽  
Lingxia Zhang ◽  
...  

The performance optimization of ceria (CeO2)-supported catalysts in heterogeneous reactions can be enabled by the control of crystal morphology. However, the insights into how CeO2-morphology affects the CO2 hydrogenation performance...


Author(s):  
Zhanfei Zhang ◽  
Jianli Wang ◽  
Lizhong Lang ◽  
Yan Dong ◽  
Jianghu Liang ◽  
...  

The two-step crystallization method for perovskite film fabrication has been recognized as an efficient process to obtain high-performance perovskite solar cells (PSCs). However, many issues related to the as-prepared lead...


Inorganics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 90
Author(s):  
Yujia Cheng ◽  
Guang Yu ◽  
Zhuohua Duan

The insulation performance of cable insulating materials can be optimised via matrix modification. Typically, low-density polyethylene (LDPE) is used as the matrix, and a certain proportion of nanoparticles are added to this matrix. To explore the effects of nanoparticles with different forms on the structural interface and crystal morphology of the material, nano-MMT and nano-ZnO were added to LDPE, and comparative experiments were carried out. Based on microscopic test results, material insulation performance changes before and after optimisation were observed. Then, simulation cable models with different insulating materials were developed. Based on the simulated electrical measurements, the thermal breakdown performance of the different insulating materials was tested. According to infrared stereo vision detection results, anomalous temperature points in the cables can be located accurately. Finally, based on macroscopic test results, we verified whether the inorganic, insulating nanomaterials meet the requirements for high-voltage transmission.


2021 ◽  
Author(s):  
Ziqing Cai ◽  
Jinqiao Ye ◽  
Yunfan Zhang ◽  
Danli Nie ◽  
Ouyang Jianglin

Abstract The temperature and strain fields are two key factors in the regulation of fibrous aggregate structure. In this paper, plate specimens of polyamide 6 were prepared by compression molding method. The oriented polyamide 6 plates were systematically analyzed from aspects of mechanical properties, thermal properties, crystal structure and crystal morphology. The maximum tensile strength and elastic modulus of polyamide 6 plate appeared at 120℃. The stretching process induced the formation of a more thermal stable α-form crystals. With the increase of stretching temperature, α-form crystals transformed into γ-form crystals gradually. The crystal chips transformed into fibrils during the stretching process. The structural evolution model of materials under the temperature and strain fields was established.


Author(s):  
Jipeng Meng ◽  
Di Bai ◽  
Pahaer Zeyaodong ◽  
Chuang Li ◽  
Xiao Chen ◽  
...  
Keyword(s):  

Talanta ◽  
2021 ◽  
pp. 123143
Author(s):  
Xue Ma ◽  
Yun Guo ◽  
Ling Zhang ◽  
Kexuan Wang ◽  
Ajuan Yu ◽  
...  

2021 ◽  
Vol 903 ◽  
pp. 22-27
Author(s):  
Aina Semjonova ◽  
Agris Bērziņš

The possibility to modify the morphology by crystallization additives of model substances was studied using molecular dynamics simulations. For this 2,6-dimethoxybenzoic acid and 3-hydroxybenzoic acid, each having two polymorphic forms, including a form without carboxylic acid homodimers in their crystal structure were selected. For each polymorph 2-3 largest crystal faces were selected for the study and the crystal was cut along these planes by preparing a simulation box with these planes facing towards solution containing additives. In the performed study it was evaluated which additives potentially can influence the crystal morphology and possibly also polymorph obtained in the crystallization by significantly changing the growth rate of crystal by adsorbing on the surface. For the study 4-5 additives providing different intermolecular interaction possibilities were selected. Among the studied additives urea showed the most complete adsorption and the longest residence time on surfaces of both substances, with the exceptions of few specific planes.


Author(s):  
Ryo Ohtani ◽  
Haruka Yoshino ◽  
Junichi Yanagisawa ◽  
Hiroyoshi Ohtsu ◽  
Daisuke Hashizume ◽  
...  

Fuel ◽  
2021 ◽  
Vol 303 ◽  
pp. 121114
Author(s):  
Jan Peter Schupsky ◽  
Tobias Netter ◽  
Guixuan Wu ◽  
Hartmut Spliethoff ◽  
Michael Müller

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