Rather than staying dissolved in the bulk liquid, surfactants prefer to gather around the surface of a bubble with their hydrophobic ends aimed into the gas and their hydrophilic ends stuck in the liquid.

• 因此，表面活性剂不会乖乖溶解在液体中，反而是喜欢群聚在气泡表面，让疏水端对准气体，而亲水端则一头栽入液体中。