华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (11): 95-99.

• 化学化工 • 上一篇    下一篇

CTAB 在纳米CaCO3 表面吸附引起的界面性质变化

唐艳军 李友明 李滨   

  1. 华南理工大学 制浆造纸工程国家重点实验室,广东 广州 510640
  • 收稿日期:2006-10-30 出版日期:2007-11-25 发布日期:2007-11-25
  • 通信作者: 李友明,教授. E-mail: pperc@scut.edu.cn E-mail:www-tang@163.com
  • 作者简介:唐艳军(1977- ),男,博士生,主要从事纸张涂布加工及特种纸的研究.
  • 基金资助:

    国家自然科学基金资助项目(202760125) 

Change of Interface Properties Caused by CTAB Adsorption on Surface of Nano-Sized Calcium Carbonate

Tang Yan-jun  Li You-ming  Li Bin   

  1. State Key Laboratory of Pulp and Paper Engineering, South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-10-30 Online:2007-11-25 Published:2007-11-25
  • Contact: 李友明,教授. E-mail: pperc@scut.edu.cn E-mail:www-tang@163.com
  • About author:唐艳军(1977- ),男,博士生,主要从事纸张涂布加工及特种纸的研究.
  • Supported by:

    国家自然科学基金资助项目(202760125)

摘要: 利用十六烷基三甲基溴化接(CTAB) 对纳米CaCO3 进行表面改性.采用凹lR 、XRD 、TG-DTG 等分析技术对改性前后的纳米CaCO3 进行表征,并通过Zeta 电位、Brookfield 黏度、吸油值、比表面积等实验对纳米CaCO3的表面改性效果进行评价.分析结果表明, CTAB 在纳米CaCO3的表面形成化学吸附,经2.0%CTAB 表面改性后,纳米CaCO3的界面性质发生了较大变化一一纳米CaC03 的Zeta 电位由负电性转向正电性, Brookfield黏度大大降低,吸油值由96.8g 降至53.1g ,比表面积从20.1 m2/g 增大到26.0m2 /g.

关键词: 碳酸钙, 十六烷基三甲基溴化铵, 改性, 界面性质, 分散

Abstract:

In this paper , cetyl trimethyl ammonium bromide (CTAB) was used to perform the surface modification of nano-sized calcium carbonate. Then , FT-IR , XRD and TG-DTG were adopted to characterize the samples before and after the modification. Moreover , the Zeta potential , Brookfield viscosity , oil-absorbed value and specific surface area of the samples were measured to evaluate the modification effect. The results indicate 出at the modification by CT AB may result in a chemical adsorption on the surface of nano-sized calcium carbonate , and that the modification with 2.0% of CTAB may cause great changes of the interface characteristics. Concretely , the Zeta potential changes form negative to positive , the Brookfield viscosity greaùy decreases , the oil-absorbed value decreases from 96. 8g to 53. 1g , and the specific surface area increases from 20. 1m2/g to 26. 0m2/g.

Key words: calcium carbonate, cetyl trimethyl ammonium bromide, modification, interface property, dispersion