光谱学与光谱分析, 2012, 32 (8): 2181, 网络出版: 2012-09-26
传统糯米灰浆碳化过程中Liesegang环的形成机理研究
Study on the Mechanism of Liesegang Pattern Development During Carbonating of Traditional Sticky Rice-Lime Mortar
摘要
采用FTIR, XRD, SEM等技术, 对传统糯米灰浆碳化过程中出现的Liesegang环现象进行了初步研究。 结果表明, 使用陈化石灰和糯米浆制备的糯米灰浆在碳化过程中能形成较明显的Liesegang环; 陈化石灰-糯米灰浆固化后的极小孔隙, 是传统糯米灰浆中Liesegang环形成的本质原因, 其形成机理符合延迟成核理论。
Abstract
Liesegang patterns in traditional sticky rice-lime mortar undergoing carbonation were investigated by means of FTIR, XRD and SEM. Results indicate that well-developed Liesegang patterns only occur in the mortar prepared with aged lime and sticky rice. The smaller Ca(OH)2 particle size in aged lime and the control of the sticky rice for the crystallization of calcium carbonate lead to the small pores in this mortar. These small pores can make Ca2+ and CO2-3 highly supersaturated, which explains the reason why Liesegang pattern developed in the sticky rice-aged lime mortar. The formed metastable aragonite proves that Liesegang pattern could be explained based on the post-nucleation theory.
魏国锋, 方世强, 张秉坚, 王晓琪, 李祖光. 传统糯米灰浆碳化过程中Liesegang环的形成机理研究[J]. 光谱学与光谱分析, 2012, 32(8): 2181. WEI Guo-feng, FANG Shi-qiang, ZHANG Bing-jian, WANG Xiao-qi, LI Zu-guang. Study on the Mechanism of Liesegang Pattern Development During Carbonating of Traditional Sticky Rice-Lime Mortar[J]. Spectroscopy and Spectral Analysis, 2012, 32(8): 2181.