半水合物
形态学(生物学)
雪花
钙
微观结构
硫酸盐
化学
石膏
矿物学
材料科学
化学工程
结晶学
冶金
地质学
工程类
古生物学
地貌学
雪
作者
Lukina Lv,Yang Gao,Ming Guo,Minfu Liu,Baocun Zhang,Han Lin,Xingong Zhang,Chenguang Liu
摘要
Abstract In this work, snowflake‐like α‐CaSO 4 ·0.5H 2 O (α‐CSH) hierarchical architectures were successfully synthesized by a facile one‐pot method in an ethylene glycol‐water system using Na 2 EDTA as a crystal morphology modifier. Characterization techniques including X‐ray diffraction (XRD), thermogravimetric (TG) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) confirmed the progressive morphological evolution of α‐CSH from rods to snowflake‐like structures ultimately to hexagonal plates with increased Na 2 EDTA concentrations. The results revealed that Na 2 EDTA concentration played a critical role in directing the crystallization and self‐assembly of α‐CSH, and a mechanism is proposed where Na 2 EDTA modulated crystal orientation through preferential adsorption and regulated the driving forces between ion‐mediated crystallization and particle‐mediated assembly. This work puts forward a simple yet effective strategy for facilely regulating the morphology of α‐CSH microstructures, which could potentially expand their applications across diverse fields such as composites, construction, biomedicine, and drug delivery.
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