改性纳米氢氧化镁的制备与表征

采用易于工业化的液相沉淀法,在石油磺酸盐的作用下,合成改性纳米氢氧化镁。通过沉降体积实验确定改性剂的最佳用量为0.2%(质量分数)。通过X射线衍射(XRD)、透射电镜(TEM)、N2吸附、堆密度分析等手段对改性前后样品进行表征分析。结果表明:改性后样品分散性好,结晶度高。红外光谱(FT-IR)和沉降实验结果表明:该方法可以使改性剂吸附在氢氧化镁颗粒表面,使氢氧化镁表面由亲水性变成亲油性,可提高氢氧化镁在有机介质中的分散稳定性。

Study on Modification of Magnesium Hydroxide Nano-particles by Petroleum Sulfonate

The surface modified nano-sized magnesium hydroxide was synthesized by wet precipitation method using the petroleum sulfonate as surface modifiers.The yield of the surface modified Mg(OH)2 nano-particles was about 98%.The optimum dosage of modifying agent was 0.2% of the mass of sodium hydroxide,which was confirmed by sedimentation volume experiments.The unmodified and modified samples were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM),N2 adsorption,tap density test,respectively.The experimental results showed that the modified samples had good dispersion and crystal.Fourier transform infrared spectroscopy(FT-IR) and the sedimentation volume experiments results suggested that the mixed surfactants were adsorbed onto the surface of Mg(OH)2 nano-particles changing the hydrophilic surface into hydrophobic and improving the dispersion stability in organic medium.