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Factors affecting foaming agent foaming
Release Date：2018-4-12 Source：xiashundong Views：1192
The foaming ability of the foaming agent and foam stability are closely related to the chemical structure of the foaming agent. Due to the large surface area of the non-ionic surfactant molecules, the surface tension of the solution is also large, and the surface is not charged, and it is difficult to form a stable double-layer liquid film, so the foaming ability and the foam stability are all more negative than the anionic surface activity. The agent is low. Anionic foaming agents are usually selected and non-ionic foaming agents are properly blended to improve the compatibility of the finishing agents. The anionic foaming agents with different chemical structures also have great differences in foaming power and foam stability. And a hydrophilic group in the middle of a branched hydrophobic group is an anionic surfactant, because it is easy to form a surface double layer adsorption, and therefore have a strong foaming ability, but points to a larger structure, intermolecular The cohesion is smaller, the strength and elasticity of the adsorption film are lower, so the foam stability formed is correspondingly smaller. Foaming agents are generally not suitable for use with branched anionic surfactants, and more linear anionic surfactants are selected, both with proper foaming ability and high foam stability. Such as soap, sodium lauryl sulfate and so on.