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研究了分散方法、纳米材料的加入体系、分散时间、分散剂的种类及SiO2 的加入量对纳米SiO2 在PET/纳米SiO2 中分散性的影响 ,用TEM对其分散情况进行表征 ,并对其分散机理进行探讨与研究。其结果表明 :采用球磨分散法并以氨基硅烷A1 1 2 0分散剂时分散效果最佳 ;当分散时间达 7 5h时 ,分散液中SiO2 基本以纳米尺寸存在 ;将分散液加入对苯二甲酸二甲酯熔体中并在球磨状态下进行酯交换SiO2 的分散效果最好 ,1 0 0nm以下的SiO2 达 95 0 7% ;体系中随SiO2 量的增加 ,其分散性变差 ,当纳米SiO2 的加入量为 1 %～ 4 %时 ,粒径在 1 0 0nm以下的SiO2 由 88%下降到 61 %。
The influence of dispersion method, the adding system of nanomaterials, dispersion time, the type of dispersant and the addition amount of SiO2 on the dispersibility of nano-SiO2 in PET / nano-SiO2 were studied. The dispersion was characterized by TEM and dispersed Mechanism to explore and research. The results show that: when the ball mill dispersion method and the aminosilane A1 1 2 0 dispersant best dispersion effect; when the dispersion time of 7 5h, the dispersion of SiO2 exists in the basic nano-size; the dispersion was added terephthalic acid Dimethyl ester melt and under ball milling state of the best dispersion of silica, silica below 100 nm 95 0 7%; with the increase of SiO2 content of the system, the dispersion becomes worse, when the nano-SiO2 Of the amount of 1% to 4%, the particle size of SiO2 below 100 nm decreased from 88% to 61%.