Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (7): 1108-1118.DOI: 10.19894/j.issn.1000-0518.210289

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Method of Evaluating the Foaming Properties of Surfactant Solutions— Real Sphere Bubble Method

Chen-Si-Fan JIAO1, Shao‑Bo ZHENG1, Peng-Jun XU2, Wei WANG2, Takebe HIROMICHI3, Mukai KUSUHIRO4, Zhong-Da YU1()   

  1. 1.Department of Material Science and Engineering,Shanghai University,State Key Lab of Metallurgy and Preparation of High Quality Special Steel,Shanghai 200072,China
    2.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China
    3.Ehime University,Matsuyama 9008267,Japan
    4.Kyushu Institute of Technology,Kyushu 8048550,Japan
  • Received:2021-06-15 Accepted:2021-12-16 Published:2022-07-01 Online:2022-07-11
  • Contact: Zhong-Da YU
  • About author:yuzhongda66@163.com
  • Supported by:
    the National Natural Science Foundation of China(51974212);the National Natural Science Foundation of China?China Baowu Steel Group Steel Joint Research Fundation(U1760101)

Abstract:

The surface tension and surface expansion viscosity of sodium dodecyl sulfate (SDS) surfactant solutions of different valences and concentrations of inorganic salt systems were measured by the true spherical bubble method. The foaming power and foam stability of the same solution were measured by the Ross-Miles method. The following results are obtained: (Ⅰ) The surface tension of the SDS solution decreases with the increase of inorganic salt concentrations until a constant value at certain concentration which is set as as a relative concentration of 100%. It is found that the critical micelle concentration (CMC) value has nothing to do with the type of added salt, but only decreases with the increase of the relative concentration of inorganic salt, i.e., the CMC value increases with the inorganic salt. The increase in the relative concentration of, from 8.3 mmol/L without inorganic salt, converges to the minimum value of 3.0 mmol/L; (Ⅱ) The surface tension and the corresponding foaming force are in a negative linear relationship, and the surface tension is inferred. The foaming power can be evaluated as that, the surface expansion viscosity and the corresponding foam stability value have a positive linear relationship, from which it is inferred that the surface expansion viscosity can evaluate the foam stability; (Ⅲ) The foaming power and foam stability of SDS surfactants increases with the valence of cations (Na+, Cu2+, Fe3+).

Key words: Inorganic salt, Surface tension, Surface dilatational viscosity, Critical micelle concentration, Foaming power, Bubble stability

CLC Number: