摘要
采用硅烷偶联剂KH-550,KH-560和硬脂酸对氢氧化镁进行表面改性。通过比较改性样品在液体石蜡中的透光度发现硬脂酸的改性效果最好。最佳的改性工艺条件为:硬脂酸用量为6%(相对于氢氧化镁干粉质量),改性温度80℃,改性时间60 min。使用XRD,FT-IR,TG-DSC等手段对产物进行了表征,分析结果表明硬脂酸对氢氧化镁的改性机理是:硬脂酸分子与氢氧化镁表面的羟基形成氢键而吸附在氢氧化镁的表面,从而改善了氢氧化镁与聚合物的相容性能。
Surface modification of magnesium hydroxide by silane coupling agent （ KH - 550 and KH - 560）and stearic acid was investigated. By comparing the transmissivity of the above modified samples in liquid paraffin, results were obtained that stearic acid was the most excellent modifier. And the optimal process conditions were as follows：dosage of stearic acid was 6% [as the mass of dry Mg（OH）2 powder], modified temperature was 80℃, and modified time was 60 min. XRD, FT-IR, and TG-DSC were used to characterize the modified samples, and the analyzed results indicated the mechanism of surface modification was that stearic acid was attached to the surface of magnesium hydroxide by hydrogen bond formed between stearie acid molecule and hydroxide radical of magnesium hydroxide, so the intereonsisteney between magnesium hydroxide and polymer got improved.
出处
《无机盐工业》
CAS
北大核心
2009年第1期29-31,47,共4页
Inorganic Chemicals Industry
关键词
氢氧化镁
表面改性
硅烷偶联剂
硬脂酸
magnesium hydroxide
surface modification
silane coupling agent
stearic acid
