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›› 2014, Vol. 14 ›› Issue (3): 487-492.

• 材料工程专栏 • 上一篇    下一篇

粉煤灰动态水热合成纳米复合托贝莫来石晶须及其表征

吕松青 马淑花 郭曦尧 郑诗礼 郭奋   

  1. 北京化工大学化学工程学院 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 北京化工大学教育部超重力工程研究中心
  • 收稿日期:2014-02-12 修回日期:2014-04-28 出版日期:2014-06-20 发布日期:2014-06-20
  • 通讯作者: 吕松青

Preparation of Nanocomposite Tobermorite Whiskers with Fly Ash by Dynamic Hydrothermal Method and Their Characterization

LV Song-qing MA Shu-hua GUO Xi-yao ZHENG Shi-li GUO Fen   

  1. College of Chemical Engineering, Beijing University of Chemical Technology Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology
  • Received:2014-02-12 Revised:2014-04-28 Online:2014-06-20 Published:2014-06-20
  • Contact: LV Song-qing

摘要: 以山西某地普通粉煤灰为原料,采用动态水热法合成纳米复合托贝莫来石晶须,考察了CaO/SiO2摩尔比、反应温度、液固比、反应时间的影响. 结果表明,以预活化的普通粉煤灰为原料,控制CaO/SiO2摩尔比为1.0、液固比为25 mL/g,在220℃下水热反应10 h,可制备出晶须长/径比大于20的纳米复合托贝莫来石晶须,优化条件下晶须可相互缠绕成中空球形颗粒,纯度达80%以上.

关键词: 托贝莫来石, 晶须, 粉煤灰, 动态水热法

Abstract: Nanocomposite tobermorite whiskers were prepared by dynamic hydrothermal method using ordinary fly ash from somewhere in Shanxi as raw material. The effects of molar ratio of CaO to SiO2, reaction temperature, ratio of liquid to solid and reaction time on the synthesis of tobermorite whiskers were examined. The results showed that nanocomposite tobermorite whiskers with the ratio of length to diameter at over 20 were synthesized under the conditions of molar ratio of CaO to SiO2 at 1, ratio of liquid to solid 25 mL/g, reaction temperature 220℃ and reaction time for 10 h. The nanocomposite tobermorite whiskers were intertwined into hollow spherical particles, and their purity reached over 80%.

Key words: tobermorite, whisker, fly ash, dynamic hydrothermal method