| 柠檬酸对半水硫酸钙晶须形貌稳定性影响 |
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| 引用本文： | 羊道和,杨玉荣,易美桂.柠檬酸对半水硫酸钙晶须形貌稳定性影响[J].人工晶体学报,2019,48(1):95-100. |
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| 作者姓名： | 羊道和 杨玉荣 易美桂 |
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| 作者单位： | 四川大学化学工程学院,成都,610065 |
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| 摘 要： | 介绍了柠檬酸对半水硫酸钙晶须的形貌稳定性的影响及其作用机制,重点考察了柠檬酸添加量及稳定化温度对晶须形貌稳定性的影响。采用XRD、SEM和红外光谱表征晶须性质。结果表明,在30～100℃范围内,随着稳定化温度的增加,半水硫酸钙晶须形貌稳定时间增长。其中在100℃,柠檬酸添加量为0. 5wt%,半水硫酸钙形晶须形貌稳定时间可达4. 0 h。由于柠檬酸的-COO-与半水硫酸钙晶须表面Ca2+键和成-COO-Ca-结构,柠檬酸以化学吸附方式吸附于晶须表面,使得晶须稳定性提高。
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| 关 键 词： | 半水硫酸钙晶须 柠檬酸 稳定化温度 形貌 |
Effect of Citric Acid on the Morphological Stability of Calcium Sulfate Hemihydrate Whiskers |
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| YANG Dao-he,YANG Yu-rong,YI Mei-gui.Effect of Citric Acid on the Morphological Stability of Calcium Sulfate Hemihydrate Whiskers[J].Journal of Synthetic Crystals,2019,48(1):95-100. |
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| Authors: | YANG Dao-he YANG Yu-rong YI Mei-gui |
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| Affiliation: | (College of Chemical Engineering, Sichuan University, Chengdu 610065, China) |
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| Abstract: | The effect of citric acid on the morphology stability of calcium sulfate hemihydrate and its mechanism of action were studied.The effects of stabilization temperature and the addition of citric acid were investigated.The hydration products were characterized by XRD,SEM and IR spectra.The results implies that the stability of the calcium sulfate hemihydrate whiskers strengthened with the increase of the stabilization temperature in the range of 30℃to 100℃.Among them,when the addition of citric acid was 0.5wt%at 100℃,the stabilization time of calcium sulfate hemihydrate increased to 4.0 h.Due to the formation of-COO-Ca-structure between-COO-of citric acid and Ca 2+of whiskers,citric acid adsorbs on the surface of whisker by chemical adsorption,enhancing the morphology stability of whiskers. |
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| Keywords: | calcium sulfate hemihydrate citric acid stabilization temperature morphology |
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