黑龙江科技学院学报2011，Vol.21Issue(6)：425-428,4.
鳞片石墨在水中的聚团行为
Study on reunite behaviour for flake gaphite in water
李哲 1肖伟丽 2徐占春1
作者信息
- 1. 黑龙江科技学院资源与环境工程学院,哈尔滨150027
- 2. 鹤岗出入境检验检疫局,黑龙江鹤岗154103
- 折叠
摘要
Abstract
Flake graphite shows strong hydrophobicity,and tends to form agglomerate in water,thus affecting the selectivity of the selection process and the dispersion in utilization process.The study on the characters of the agglomeration of flake graphite powders in water by measurements of the contact angle,the heat of wetting,Zeta potential and the experiment of vacuum flotation shows that flake graphite powder,with the contact angle of close to 90°,exhibits strong hydrophobicity.Flake graphite of different grain sizes,subject to the wetting process,show two processes： the exothermic process and endothermic process,which fail to occur spontaneously.The increasing contact angle of flake graphite yields decreasing Zeta potential,allowing flake graphite particles to agglomerate more easily.The flake graphite particles agglomerating with the core of big flake graphite particle,due to increasing graphite particle concentration,overlap to aggregation considerably bigger than a single particle.The agglomeration behaviors of flake graphite particles in water can be explained by the extended DLVO theory and the hydrophobic interaction between the particles is the fundamental reason for the formation of agglomerates.关键词
鳞片石墨/接触角/润湿热/Zeta电位/聚团Key words
flake graphite/contact angle/wetting heat/Zeta potential/agglomeration分类
化学工程引用本文复制引用
李哲,肖伟丽,徐占春..鳞片石墨在水中的聚团行为[J].黑龙江科技学院学报,2011,21(6):425-428,4.
