| 氢氧化铝的化学改性研究 |
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| 引用本文： | 马淑花,郭奋,陈建峰. 氢氧化铝的化学改性研究[J]. 北京化工大学学报(自然科学版), 2004, 31(4): 19-22 |
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| 作者姓名： | 马淑花 郭奋 陈建峰 |
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| 作者单位： | 北京化工大学教育部超重力工程研究中心,北京,100029;北京化工大学教育部超重力工程研究中心,北京,100029;北京化工大学教育部超重力工程研究中心,北京,100029 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 将由二氧化碳碳化分解偏铝酸钠溶液得到的氢氧化铝在高温高压下,加入特定无卤改性剂进行化学改性,得到物质X。通过TG,TEM,XRD,FTIR等手段对其热学性能、形貌、晶型、改性机理等进行分析和表征。可以得知:此物质X是一种新的化学物质,它是氢氧化铝被化学改性的产物,呈菱形片状,厚度在80～100nm之间,其热分解温度达到340℃以上,失质量率在50%左右,分解热为2352.5kJ/kg;发生化学改性的主要原因是铝原子是缺电子原子,而改性剂氧原子具有孤电子对,二者易发生配位.
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| 关 键 词： | 氢氧化铝 化学改性 新物质 配位 |
| 收稿时间： | 2003-12-08 |
| 修稿时间： | 2003-12-08 |
Chemical modification of aluminium hydroxide |
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| Ma Shu hua Guo Fen Chen Jian feng. Chemical modification of aluminium hydroxide[J]. Journal of Beijing University of Chemical Technology, 2004, 31(4): 19-22 |
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| Authors: | Ma Shu hua Guo Fen Chen Jian feng |
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| Affiliation: | Research Center of the Ministry of Education for High Gravity Engineering and Technology;Beijing University of Chemical Technology;Beijing 100029;China |
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| Abstract: | Sodium aluminate was carbonated by CO2 in a stirred tank reactor to form aluminium hydroxide, which was subsequently chemically modified with a special non halogen modifier under a high temperature and pressure to yield a substance X. By means of TG, TEM, XRD and FTIR, it is found that the substance X is a new flat rhombic substance whose decomposition temperature is higher than 340℃, weight loss approximately 50%,and enthalpy of thermal decomposition 2352.5kJ/kg. The main mechanism of the modification is coordination effect of aluminium atom with empty p oribit and oxygen atom with isolated pairs of electrons in the modifier. |
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| Keywords: | aluminium hydroxide chemical modification new substance coordination |
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