XRD pattern for pure ASA (the sharp and well-defined peaks indicate the crystalline nature of the ASA), ASA-loaded LCS and empty LCS. The XRD pattern on the right is a zoom-in of the 2θ...

2022年5月1日 · High-performance amorphous silica-alumina (ASA) is an important acid material in the chemical industry. In this work, we successfully synthesized mesoporous ASA with enhanced specific surface area, Lewis acidity and total acidity by pH-swing method. The morphology and structure of ASA were systematically investigated.

A decrease in the decomposition temperature of 5-ASA was observed by comparing the microparticles with the physical mixture for the system CaAl (CaAl, 265°C; PMCaAl, 275°C), C1CaAl (C1CaAl, 265...

In contrast to Ir–Re/D-ASA-0.5, the XRD pattern of Ir–Re/ASA with similar mean size shows sharp and strong diffraction peaks for metallic Ir crystal and a weak peak for metallic Re.

用熔融插层法制备聚对苯二甲酸丙二醇酯(PTT)/丙烯腈-苯乙烯-丙烯酸酯三元共聚物(ASA)/有机蒙脱土(OMMT)复合材料, 研究了OMMT对PTT/ASA体系相形态、结晶性能、流变性能和力学性能的影响。结果表明, OMMT主要以剥离态分布在PTT基体相和界面处, 使ASA分散相的尺寸变小 ...

The modified acrylonitrile-styrene-acrylate terpolymer (ASA) serving as thermal insulation material has been investigated, accompanied by the Y3Al5-xFexO12 (x = 0.5, 1.0, 1.5, 2.0, 3.0) inorganic powders as the functional modifiers.

分析了不同制备方法对ASA材料结构和酸性的影响、ASA材料的酸性成因及其影响因素,综述了ASA材料在加氢裂化、催化裂化和其他催化反应过程中的应用,以期为高性能ASA材料的制备提供指导。 结合目前发展趋势提出未来ASA材料研究的主要方向。

2020年12月15日 · Xylan extracted from corn cobs was used to produce mesalamine-loaded xylan microparticles (XMP5-ASA) by cross-linking polymerization using a non-hazardous cross-linking agent. The microparticles were characterized by thermal analysis (DSC/TG), X-ray diffraction (XRD), Infrared spectroscopy (FTIR-ATR) and scanning electron microscopy (SEM).

XRD（X-ray Diffraction）中文全称是 X射线衍射 ，是一种快速、准确、高效的材料无损检测技术。作为一种表征晶体结构及其变化规律的手段，其应用遍及材料、化学、生物、医药、陶瓷、冶金、矿产等诸多领域。

2021年8月1日 · To achieve facile cost-effective synthesis of acidity-enhanced amorphous silica-alumina (ASA), a water-based sol-gel process is developed. Effectively, this method not only enhances acid sites density, but also lowers the cost by using aluminum nitrate nonahydrate instead of expensive organic aluminum precursor.