无机复合超细阻燃填料的表面改性

对适宜配比的硅镁铝粉-氢氧化镁复合阻燃填料进行了表面改性方法和配方研究,考察改性方法、改性剂配方、改性剂用量等对复合阻燃填料填充效果的影响。采用红外光谱和扫描电镜对复合阻燃填料进行测试分析。结果表明:湿法改性效果好于干法,最佳的表面改性剂为硅烷SCA313和脂肪酸的复配,适宜的用量为w(SCA313)=0.6%、w(脂肪酸)=1.0%;改性剂以化学吸附方式协同包覆于填料表面。

Study on Surface Modification of Ultrafine Inorganic Composite Flame-retardant Filler

The method and formula of surface modification of composite flame-retardant filler which was prepared mainly from proper ratios of SiMg-Al powder and magnesium hydroxide(Mg (OH)2) was studied. The method of modification, modifier and the dosage of the modifier were investigated. IR and SEM were used to characterize the composite powder. The results indicated that wet modification was better than dry modification, proper modifier was SCA313 added with fatty acid and the dosage of SCA313 was 0.6%, and fatty acid was 1.0%. The modifier was covering the surface of the filler due to the synergies of chemical adsorption and covering effects.