CHEN Pengyu, CHENG Na, MI Shuying, ZHOU Meifang, JIANG Haibo, LI Chunzhong
(Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237)
Abstract:Silica slurry obtained by wet grinding was dried by four drying methods such as freeze drying, spray drying, vacuum drying and oven drying. The influence of drying methods on the physical and chemical properties of silica after grinding was studied by the test of particle diameter, oil absorption value (DBP value) , specific surface area (BET value) and microstructure.The results show that silica's median particle diameter (d50) drops from 9.6 μm to 110 nm and its DBP value and BET value are lower than the pristine silica. The median particle diameter of silica after freeze drying drops to 73 nm, while its DBP value (2.15 mL/g) and BET value (144 m2/g) are nearest to pristine silica.
Keywords: silica; wet grinding; drying methods; particle diameter
文章编号:1008-5548(2017)03-0030-04
DOI:10.13732/j.issn.1008-5548.2017.03.006
收稿日期:2016-12-28, 修回日期:2017-03-25,在线出版时间:2017-06-28。
基金项目:国家自然科学基金项目,编号:91534202;91534122;上海市基础重点研究项目,编号:15JC1401300;国家国际科技合作专项项目,编号:2015DFA51220。
第一作者简介:陈鹏宇(1992—),男,硕士研究生,研究方向为白炭黑的分散改性及其在轮胎橡胶中的应用。E-mail:chenpengyuchn@163.com。
通信作者简介:
姜海波(1972—)男,博士,副研究员,硕士生导师,研究方向为无机纳米粉体的制备、纳米合金制备、TiO2 光催化等。 E-mail:jianghaibo@ecust.edu.cn;
李春忠(1972—)男,博士,教授,博士生导师,研究方向为新型纳米材料合成、结构调控与过程放大等。E-mail:jianghaibo@ecust.edu.cn。