摘要
以水玻璃为原料,采用硫酸制备纳米白炭黑,并利用硅烷偶联剂S i-75对纳米白炭黑进行疏水改性。通过X射线衍射、透射电镜、红外光谱和热重分析对纳米白炭黑进行表征。粉末X射线衍射(XRD)分析结果显示,纳米白炭黑为非晶态二氧化硅;通过透射电镜(TEM)分析可知,改性后的纳米白炭黑分散性更好,团聚降低,白炭黑一次粒径在20 nm^40 nm,粒子之间相互连接形成链枝结构附聚体;红外光谱(FT-IR)和热重分析(TG)显示,硅烷偶联剂S i-75成功地接枝到纳米白炭黑。活化指数(99.6%)的测定表明,合成的纳米白炭黑具有超疏水性。
In this paper,the nano-silica was produced by using sulfuric acid from water-glass as raw materials and the nano-silica was hydrophobicly modified with silane coupling agent（Si-75）.The silica particles were characterized with X-ray diffraction（XRD） transmission electron microscopy（TEM）,fourier transform infrared analysis（FT-IR） and thermogravimetric analysis.The analysis result of powder X-ray diffraction（XRD） reveals that the nano-sicila was amorphous;TEM showed that the modified nano-silica had better scattered and lower reunited and the silica particles which had some 20 nm^40 nm particle size presented sphere approximately and came into contact with each other.The additional polymer formed by connection among the congeries presented a chain-branch structure.Fourier transform infrared analysis（FT-IR） and thermogravimetric analysis reflected silane coupling agent（Si-75） was grafted successfully onto the nano-silica.A super-hydrophobic nano-silica was synthesized via the determination of activation index（99.6%）.
出处
《山西化工》
2011年第2期26-28,55,共4页
Shanxi Chemical Industry
