| 水滑石晶体长厚比及晶粒尺寸控制方法研究 |
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| 引用本文： | 冯桃,李殿卿,Evans D.G.,段雪. 水滑石晶体长厚比及晶粒尺寸控制方法研究[J]. 无机化学学报, 2002, 18(11): 1156-1160 |
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| 作者姓名： | 冯桃 李殿卿 Evans D.G. 段雪 |
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| 作者单位： | 北京化工大学可控化学反应科学与技术基础教育部重点实验室,北京,100029 |
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| 基金项目： | 北京市基金资助项目(No.2002016)。 |
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| 摘 要： | 层状双金属氢氧化物（LayeredDoubleHydrox－ides，简称LDH）是一类重要的无机晶体材料，因其具有层状结构以及层板元素的可调控性和层间阴离子的可交换性，在催化、离子交换、吸附、医药犤１～８犦等方面具有广泛的用途，已受到人们越来越广泛的关注。近年来，随该类材料应用领域的不断拓展，在许多情况下要求LDH晶体具有小的粒径尺寸，以便最大限度地发挥其功能性。例如将LDH作为阻燃剂犤９犦使用，小粒径粉体可增强与聚合物基材的相容性，提高材料的阻燃、抑烟和力学性能。另一方面，因LDH具有层状结构，在复合材料中其层板能有效…
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| 关 键 词： | 层状双金属氢氧化物 过饱和度 晶粒尺寸 晶化 |
| 修稿时间： | 2002-07-14 |
Studies on Control of the Aspect Ratio and Particle Size of Hydrotalcite |
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| FENG Tao,LI Dian-Qing,Evans D.G. and DUAN Xue. Studies on Control of the Aspect Ratio and Particle Size of Hydrotalcite[J]. Chinese Journal of Inorganic Chemistry, 2002, 18(11): 1156-1160 |
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| Authors: | FENG Tao LI Dian-Qing Evans D.G. DUAN Xue |
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| Affiliation: | Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029,Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029,Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029 and Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029 |
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| Abstract: | Solutions of Mg(NO3)2·6H2O, Al(NO3)3·9H2O, NaOH and Na2CO3 were mixed in a rotating liquid-memb- rane reactor. The crystal growth process of Mg-Al-CO3 hydrotalcite was then studied by adding different amounts of water to the resulting slurry during the crystallizing process. The initial 6 hours of the crystallization was found to be the key period controlling crystal growth. Adding 150 to 250mL of water to the reaction system at the beginning of crystallization affords Mg-Al-CO3 hydrotalcite with relatively small particle size and large aspect ratio. |
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| Keywords: | layered double hydroxides supersaturation degree particle size crystallization |
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