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›› 2008, Vol. 8 ›› Issue (4): 829-832.

• 材料工程专栏 • 上一篇    

纳米SiO2表面改性无团聚氯化钠微粒的制备及其表征

代梦艳 胡碧茹 张学骜 吴文健   

  1. 国防科技大学 国防科学技术大学航天与材料工程学院 国防科学技术大学航天与材料工程学院 国防科学技术大学航天与材料工程学院
  • 收稿日期:2008-04-24 修回日期:2008-06-19 出版日期:2008-08-20 发布日期:2008-08-20
  • 通讯作者: 代梦艳

Preparation and Characterization of Agglomeration-free Sodium Chloride Particles Modified with SiO2 Nano-particles

DAI Meng-yan HU Bi-ru ZHANG Xue-ao WU Wen-jian   

  1. Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology
  • Received:2008-04-24 Revised:2008-06-19 Online:2008-08-20 Published:2008-08-20
  • Contact: DAI Meng-yan

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被引次数

9

摘要： 通过在结晶过程添加纳米SiO2颗粒和表面活性剂F127影响和控制NaCl晶体的生长过程，得到微米级的单分散NaCl微粒. 扫描电子显微镜观察显示纳米SiO2颗粒附着于NaCl粒子表面，粒度分析测试表明微粒的粒度分布范围为0.1~15 mm，体积平均粒径为7.25 mm. 添加纳米SiO2后，微粒的单分散性和流动性变好，流速达到4~6 mL/s，松装密度增大到0.6~0.8 g/cm3，吸湿性下降. SEM和FT-IR、吸湿性测试表明这种制备方式改进了NaCl粒子的表面性能，可以有效降低其吸湿性能和硬团聚现象，改进流动性和分散性.

关键词: NaCl颗粒, 纳米SiO2颗粒, 表面改性, 团聚

Abstract: By means of adding SiO2 nano-particles and surfactant F127 in the crystallization process of NaCl to modify the surface of crystals, the micrometer NaCl powder was prepared. The SEM analysis shows that SiO2 particles are adsorbed to the surface of NaCl crystals. The size distribution scope is 0.1~15 mm. It is found that the more the SiO2 nano-particles are added, the better the dispersion and fluidity become. The bulk density of NaCl particles is 0.6~0.8 g/cm3. The volumetric flow rate of NaCl particles is 4~6 mL/s. The results imply that such modification could effectively avoid water absorption and hard agglomeration of particles and improve their dispersion and fluidity.

Key words: sodium chloride particles, SiO2 nano-particles, surface modification, agglomeration

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