L-天门冬氨酸对三水碳酸镁晶体合成的影响研究

Effect of L-Aspartic Acid on the Crystallization of Magnesium Sulfate

依据仿生合成的原理,选择无水Mg Cl2和无水Na2CO_3作为反应原料,通过L-天门冬氨酸和五种无机表面活性剂分别对晶体生长进行调控,应用XRD、SEM对晶体的物相组成以及形貌结构进行表征。试验结果表明当表面活性剂为L-天门冬氨酸时,晶体生长效果最佳。又通过以L-天门冬氨酸添加量和体系p H值为参数变量进行研究,结果表明L-天门冬氨酸质量分数为0.15%,体系p H为9.5为最佳条件,有毫米级束状三水碳酸镁晶体的生成,并对L-天门冬氨酸在仿生合成三水碳酸镁过程中的作用机理进行了初步探讨。

Based on the principle of biomimetic synthesis,anhydrous Mg Cl2 and anhydrous Na2CO3 were selected as the reaction materials. The growth of crystals was controlled by L-aspartic acid and five inorganic surfactants respectively. XRD、SEM were used to analyze the phase Composition and morphology of the structure. The results show that when the surfactant is L-aspartic acid,the crystal growth is the best. The results show that when the mass fraction of L-aspartic acid is 0. 15% and the p H is 9. 5,crystallization of magnesium sulfate with millimeter is formated. The formation mechanism of Laspartic acid crystals in the process of bionic synthesis of magnesium carbonate was discussed.