炭黑表面能与甲苯抽出物透光率的关系

Relationship between Surface Free Energy of Carbon Black and Light Transmittance of Toluene Extract

选取具有相同比表面积、不同甲苯抽出物透光率的炭黑N134,采用反相色谱测试其表面能,考察炭黑表面能与甲苯抽出物透光率的关系。结果表明:当甲苯抽出物透光率低时,炭黑N134晶体边缘的高能位点被不完全燃烧的原料油或者烃类物质占据,炭黑N134的表面能色散分量低;当甲苯抽出物透光率为77%时,炭黑N134的表面能色散分量为233.6 mJ·m^-2,甚至比甲苯抽出物透过率为92%的炭黑N234低约24%;当甲苯抽出物透光率高于82%时,随着甲苯抽出物透光率的提高,炭黑N134的表面能色散分量呈线性提高;当甲苯透光率为99%时,炭黑N134的表面能色散分量达到511.0 mJ·m^-2。炭黑生产企业可通过控制工艺和原材料提高炭黑纯净度,以提高炭黑质量。

Surface energy of carbon black(CB)N134 with the same specific surface area and different light transmittance of toluene extract(LTTE)was measured by inverse gas chromatography to investigate the effects of LTTE of CB on surface energy.The results showed that,the dispersive component of surface energy of CB N134 was low when the LTTE was low,because the high energy site of CB crystal edge was occupied by the incomplete combustion oil and alkanes.When the LTTE was 77%,the dispersive component of surface energy of CB N134 was 233.6 mJ·m^-2,which was about 24%lower than that of CB N234 with 92%LTTE.The dispersive component of surface energy of CB N134 increased linearly with the LTTE increasing when the LTTE was higher than 82%and reached 511.0 mJ·m^-2 when the LTTE was 99%.The manufacturers of CB could improve purity and quality of CB by controlling production process and raw material.