Surfactant and application thereof in hair dyeing

The invention discloses a surfactant and application thereof in hair dyeing, and belongs to the technical field of surfactants. The surfactant of the invention has cationic groups which can be combined with hair; and meanwhile, the surfactant has polar and non-polar groups which easily make straw pigments to be uniformly dispersed on the hair. The surfactant and a black dye can be used together toprepare a brownish black hair dye. By uniformly spraying the obtained hair dye onto hair for dyeing the hair at normal temperature for 10-60 min, the colored hair can be uniformly dyed into brownishblack, and the hair dye is high in fastness, healthy and non-toxic. 本发明公开了一种表面活性剂及其在染发中的应用，属于表面活性剂技术领域。本发明表面活性剂具有的阳离子基团能够和头发相结合，同时具有极性和非极性基团，容易使秸秆色素在头发上分散均匀，可与黑色染料制得棕黑色染发剂。将所得染发剂均匀喷涂于头发，在常温下染发10-60min即可将色头发均匀染成棕黑色，牢度高且健康无毒。