以水玻璃为硅源、硫酸为沉淀剂传统化学沉淀法制备白炭黑,探索原位改性和后处理改性的效果;采用扫描电子显微镜、激光粒度分析仪、X射线衍射仪、热分析仪、傅里叶变换红外吸收光谱分析改性前后样品的形貌、团聚体粒径、结构及改性效果;采用N2吸附测试、DBP值测试对改性前后空间结构度进行表征。结果表明:原位改性比后处理改性工艺效果更好,干燥后聚集体粒子平均粒径15.59μm;改性后白炭黑表面Si—OH的强度减小,疏水性增强,BET值为112.7 m2/g,吸油值为3.44 m L/g,具有较大的比表面积和空间结构度。
【英文摘要】
Silica was prepared by traditional chemical precipitation method using water glass as silicon source and sulfuric acid as precipitant. The modification effect of two processes the in-situ modification preparation and the post-treatment modification was studied. The morphology, size,structure and the modification effect of the modified samples were characterized by scanning electron microscopy, laser particle size analyzer, X-ray diffractometer, thermal analyzer and Fourier transform infrared absorption spec...
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