Additives Applied for Preparation of Superfine Mg(OH)2 Particles by Light-burned MgO at Low Temperature
Due to its buffer property, activity, absorbability and safety, magnesium hydroxide is widely used in environmental protection, pharmaceutics, pulp and paper industry, and as flameretardant filling in composite materials. The hydrothermal synthesis of magnesium hydroxide at low temperature (< 100℃) needs only simple equipment and is environmentally friendly and energy-saving, so the process is promising and easy for industrialization. In this study, we have investigated the effects of hexamethylenetetramine and ammonia additives on the hydrating synthesis of superfine Mg(OH)2 particles at 70℃. Mg(OH)2 particles formed were of platelet shape and the mean diameter was approximately 200nm. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were applied to characterize the crystal phase, size distribution and morphology of the crystal particles. Different morphologies of Mg(OH)2 particles were formed in hexamethylenetetramine and ammonia solutions. The generation velocity of hydroxyl (OH-) was found to play an important role in the distribution and morphology of Mg(OH)2 particles.
Magnesium hydroxide Nanostructures Chemical synthesis
Kong Qinggang Qian Haiyan Huining Xiao Kai Liu Jianke Wang Jing Zhuang Jun Li
Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, College of Envir College of Material Science and Technology, Nanjing University of Technology, Nanjing 210009, PR Chi spheric Environment Monitoring and Pollution Control, College of Environmental Science and Engineeri
国际会议
合肥
英文
1026-1030
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）