【摘要】 以硫酸镁、氢氧化钠和硬脂酸盐类表面改性剂为原材料,80℃反应3 h,一步合成了表面改性的氢氧化镁粉体颗粒。XRD和TEM分析表明颗粒为规则的六方片状结构,TGA测定热分解温度最高可达387.7℃,吸水率低达1.9%,且与有机基质有良好的相容性。在硬脂酸锌、硬脂酸镁、硬脂酸钙、硬脂酸钠和硬脂酸5种改性剂中,硬脂酸锌的改性效果最好,硬脂酸的最差。当w(ZnSA)=3.15%时,氢氧化镁的吸水率为1.984%,TEM表明含有棒状晶体结构,长径比约为11∶1。更多还原

【Abstract】 Surface modified magnesium hydroxide particles were synthesized by one-step process using magnesium sulfate,sodium hydroxide and stearates as raw materials,reacting at 80 ℃ for 3 h at certain prescriptions.XRD and TEM images revealed that the particles have a regular platelet-shaped hexagonal morphology.TGA showed that its max,thermal stability temperature reached 387.7 ℃,in addition,its water absorption ratio is as low as 1.9% and its compatibility with organic solutions is very well.Among the five stearate surfactants,the most effective modifying agent was zinc stearate(ZnSA) and the worst was stearic acid.When w(ZnSA)=3.15%,the water absorption ratio was 1.984%,and TEM image showed that the particles had a rod-like crystal structure with length to width ratio about 11∶1.更多还原