Novel flame-retardant-immobilized and ultraviolet-absorberimmobilized silica nanoparticles

成功地实现了溴系阻燃剂和磷系阻燃剂的固定化。用这些阻燃剂固定的二氧化硅填充的环氧树脂的极限氧指数值高于未处理的二氧化硅和自由阻燃剂填充的环氧树脂。光稳定剂也固定在二氧化硅表面上。填充有光稳定剂固定的二氧化硅的复合材料具有吸收UV光的能力。几乎没有观察到添加剂从填充有这些阻燃剂和光稳定剂二氧化硅的聚合物基质中消除到沸水中。结果清楚地显示了二氧化硅纳米颗粒对于阻燃剂和光稳定剂的固定化的锚效应。

The immobilization of bromine flame retardant and phosphorous flame-retardant was successfully achieved. The limiting oxygen index value of epoxy filled with these flame retardant-immobilized silica was higher than that of epoxy resin filled with untreated silica and free flame retardants. Photostabilizer was also immobilized onto silica surface. The composites filled with the photostabilizer-immobilized silica has an ability to absorb UV light. The elimination of additives from polymer matrices filled with these flame retardant-and photostabilizer-silica into boiling water was hardly observed. The results clearly show the anchor effect of silica nanoparticle for the immobilization of flame retardant and photostabilizer.