Preparation of Magnesium Hydroxide Chloride Hydrate Nanowires Using Calcined Dolomite

Magnesium hydroxide chloride hydrate(MHCH) nanowires are important polymer fillers and precursors for one-dimensional nanostructures.Here a novel method was presented to prepare MHCH nanowires using calcined dolomite as raw materials via a hydrothermal approach.XRD,SEM,and FT-IR analyses indicate that the as-prepared MHCH is well crystallized Mg10(OH)18Cl2.5H2O nanowires with diameters of 50-120 nm and length of several tens micrometers.The TG-DTA patterns of MHCH consisted of two steps and MHCH is at endothermic status during the whole heating process.The molar ratio of(MgO+CaO) in calcined dolomite to MgCl2(R) plays a key role to the structure and morphology of MHCH.The aspect ratio of MHCH nanowires decreases with the increasing of R and Mg(OH)2 will be formed when R was greater than 0.5.The optimum R to prepare MHCH is between 0.025 and 0.075.This study will extend the potential applications of dolomite due to the extensive applications of MHCH.