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Surfactants are a type of substance that can significantly reduce the surface tension of liquids or interfacial tension between two phases. They are widely used in daily life and industrial production, including stain removal and foaming in cleaning agents, emulsion dispersion in cosmetics, wetting and penetration in pesticides, dyeing and finishing in textile printing and dyeing, oil displacement and viscosity reduction in petroleum extraction, and emulsion stability in food processing. They play an important role in improving product quality, saving energy, reducing costs, and improving production processes.