Collision and attachment behavior between rising bubble and plastic plate in pure water

被引：0
|
作者：
Nie D. [1 ]
Huang X. [1 ]
Sun Z. [1 ]
机构：
[1] School of Energy Science and Engineering, Central South University, Changsha
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2019年 / 45卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Attachment; Bubble; Collision; Hydrophobicity; Plastic flotation;
D O I：
10.13700/j.bh.1001-5965.2018.0708
中图分类号：
学科分类号：
摘要：
In order to reveal the influence of bubble size and surface hydrophobicity on the flotation process of plastics, high-speed photography was used to observe the collision and adhesion behavior of rising bubbles and plastic plates in pure water medium. According to the change of bubble velocity, it is divided into three stages: collision, liquid film drainage and three-phase contact line diffusion. Based on image processing technology, the bubble collision deformation, adhesion time, three-phase contact line diffusion characteristics and their effects are quantitatively analyzed. The results show that the deformation factor gradually evolves from slightly larger than 1.00 to slightly less than 1.00 as the diameter of the bubble increases. The hydrophobic plate with strong hydrophobicity makes the deformation factor of the same diameter bubble larger, and the collision time increases with the increase of the bubble diameter, but decreases with the increase of the hydrophobicity. The stronger the hydrophobicity of the plastic plate is, the shorter the time it takes to form a three-phase contact. When the bubble diameter is 1.0 mm, the liquid film discharge time of both the poly tetra fluoroethylene (PTFE) and polymethyl methacrylate (PMMA) plates is extremely small, which are 4.8 ms and 56 ms respectively. The diffusion time of the three-phase contact line increases with the increase of the bubble size, and decreases with the increase of the hydrophobicity of the plate. When the bubble size is the same, the diffusion diameter of the three-phase contact line decreases as the hydrophobicity of the plate decreases. © 2019, Editorial Board of JBUAA. All right reserved.
引用
收藏
页码：1569 / 1574
页数：5
相关论文
共 16 条
  • [1] Sun A.H., Yan Y., Yang C., Et al., Development prospect of modified plastics in China, Engineering Plastics Application, 39, 2, pp. 83-87, (2011)
  • [2] Shen J., Xie H.Q., Development of research and application of the advanced composite materials in the aerospace engineering, Materials Science and Technology, 16, 5, pp. 737-740, (2008)
  • [3] Lu Z.X., Zhang H., Thermal analysis for dynamic behavior of microcellular polycarbonate, Journal of Beijing University of Aeronautics and Astronautics, 32, 9, pp. 1109-1112, (2006)
  • [4] Wang J.F., Zheng X.Q., Li S.T., Et al., Internal charging protection technology of typical space polymer dielectric material, Journal of Beijing University of Aeronautics and Astronautics, 37, 2, pp. 180-184, (2011)
  • [5] Cao F.L., Li H.X., Shen Z.G., Modulus prediction of a polymer matrix composite reinforced with fly-ash hollow microspheres, Journal of Beijing University of Aeronautics and Astronautics, 31, 6, pp. 87-90, (2005)
  • [6] Chen D., Huang X.Y., Wang P., Et al., Recycling effective ways of waste plastics, Engineering Plastics Application, 40, 9, pp. 92-94, (2012)
  • [7] Zhou B.Y., Guo L.L., Li L., Et al., Characteristics of generation and recycling of plastic packaging waste in China and management countermeasures, Research of Environmental Sciences, 23, 3, pp. 282-287, (2010)
  • [8] Wang C., Wang H., Fu J., Et al., Flotation separation of waste plastics for recycling-A review, Waste Management, 41, pp. 28-38, (2015)
  • [9] Niecikowska A., Zawala J., Miller R., Et al., Dynamic adsorption layer formation and time of bubble attachment to a mica surface in solutions of cationic surfactants, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 365, 1, pp. 14-20, (2010)
  • [10] Krasowska M., Zawala J., Malysa K., Air at hydrophobic surfaces and kinetics of three phase contact formation, Advances in Colloid and Interface Science, 147-148, pp. 155-169, (2009)
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