水热条件对纤蛇纹石纳米管合成的影响研究

采用水热法在不同反应条件下合成了一系列纤蛇纹石纳米管.利用红外吸收光谱、扫描电镜和透射电镜系统地研究了水热反应中,反应温度、Si/Mg比、反应时间等不同反应参数对合成纤蛇纹石纳米管的晶体生长及其结构的影响.结果表明,温度的升高、Si/Mg比趋近0.68及反应时间的延长均有利于纤蛇纹石的生长,并获得最佳条件下合成的纤蛇纹石条件.

The influence of hydrothermal conditions on the synthesis of chrysotile nanotubes

A series of chrysotile samples were synthesized from active MgO and amorphous SiO_2 through the hy-drothermal reaction under the conditions of different temperatures, Si/Mg ratios and reaction time spans. The influence of different reaction conditions on the synthesis of chrysotile nanotubes was studied by means of infrared spectrometry, scanning electronic microscope and transmission electronic microscopy. The results show that the rate of the formation of nanotubes is determined by the Si/Mg ratio, the synthetic temperature and the reaction time. The synthetic chrysotile asbestos become relatively perfect under the conditions of high temperature, fairly long reaction time and Si/Mg ratio close to 0.68. The perfect synthetic conditions are thus achieved.