| 摘要 |
<p>A device for releasing to the air an active ingredient in vapour phase comprises a reservoir (1) which holds a liquid composition (8) in liquid contact with a volatilisation surface (2) , the composition comprising: i) an organic solution phase comprising an ionisable surfactant, ii) an aqueous phase comprising colloidal particles with a surface charge opposite to that of the head group of the surfactant when ionised, and iii) an active ingredient. The composition spontaneously forms a thin film on the volatilisation driven by self-assembly of the colloidal particles and immobilised surfactant at the interface between the two phases .</p> |
