中国科学院上海应用物理研究所唐忠锋团队报道了琥珀酸对由MgCl₂·6H₂O和尿素制备的无水MgCO₃颗粒形貌转变的影响。相关研究成果于2023年12月15日发表于国际一流学术期刊《颗粒学报》。

由于多种合成因素，难以获得具有优异性能的均匀可控的无水MgCO₃颗粒。

研究人员采用水热法研究了丁二酸作为晶体改性剂对无水MgCO₃颗粒形态转变的影响。添加琥珀酸对颗粒的影响与温度变化的影响相似。折叠类金刚石颗粒的形貌逐渐均匀，颗粒尺寸在3.3至7.5μm之间。在pH 9下制备的无水MgCO₃颗粒可以容易地团聚，并且随着反应时间的增加，平均粒径从金刚石状增加到立方体。琥珀酸与镁离子在不同浓度下的相互作用是导致形态变化的主要因素。pH、温度和时间影响分子运动速率和晶体生长。

附：英文原文

Title: Effect of succinic acid on morphology transformation of the anhydrous MgCO3 particles prepared by MgCl2·6H2O and urea

Author: anonymous

Issue&Volume: 2023/12/15

Abstract: The homogeneous and controllable morphology of anhydrous MgCO3 particles with excellent properties is difficult to obtain because of a variety of synthetic factors. The effect of succinic acid as a crystal modifier on the particle morphology transformation of anhydrous MgCO3 was investigated by the hydrothermal method. The effect of the addition of succinic acid on the particles was similar to that of temperature change. The morphology of particles with folded diamond-like shape was gradually uniform, and the particle size was between 3.3 and 7.5 μm. Anhydrous MgCO3 particles prepared at pH 9 could easily agglomerate, and the average particle size increased from diamond-like to cube-like as the reaction time increased. The interaction between succinic acid and magnesium ion at different concentrations was the main factor responsible for the morphological changes. The pH, temperature, and time affected the molecular motion rate and crystal growth.

DOI: 10.1016/j.partic.2023.12.003

Source: https://www.sciencedirect.com/science/article/abs/pii/S1674200123003206