不同改性方式对沉淀白炭黑性能的影响

发布时间：2018-06-10 13:50

本文选题：白炭黑 + 水玻璃　；参考：《中国粉体技术》2017年05期

【摘要】：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。
[Abstract]:Silica was prepared by traditional chemical precipitation method with sodium silicate as silicon source and sulfuric acid as precipitator to explore the effect of in-situ modification and post-treatment modification. Scanning electron microscope, laser particle size analyzer, X-ray diffractometer and thermal analyzer were used to prepare silica. Fourier transform infrared spectroscopy (FTIR) was used to analyze the morphology, particle size, structure and modification effect of the samples before and after modification, and the spatial structure degree of the modified samples was characterized by N2 adsorption test and DBP value test. The results showed that the effect of in-situ modification was better than that of post-treatment, and the average particle size was 15.59 渭 m after drying, and the strength of Si-OH on the surface of silica decreased after modification. The hydrophobicity enhancement has a BET value of 112.7 m2 / g and an oil absorption value of 3.44 mL / g, which has a large specific surface area and a large spatial structure.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;中国矿业大学(北京)地球科学与测绘工程学院;
【基金】：横向自主科研基金项目,编号:330123
【分类号】：TQ127.2

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