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中文摘要：
利用十六烷基三甲基溴化铵（CTAB）对纳米CaCO3进行表面改性．采用FTIR、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——纳米CaCO3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20．1m^2／g增大到26．0m^2／g．
英文摘要：
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 that the modification by CTAB 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 greatly decreases, the oil-absorbed value decreases from 96.8 g to 53.1 g, and the specific surface area increases from 20. 1 m^2/g to 26.0 m^2/g.
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