The invention relates to a quaternized modified amino
silicone oil softener and preparation and application thereof. The softener comprises the following general formula in the specification. The preparation comprises the following steps of: (1) adding octamethylcy-clotetrasiloxane into a container, adding a
coupling agent N-beta-(aminoethyl)-gamma-aminopropyl methyl dimethoxysilane into the container dropwise, adding a tetramethyl
ammonium hydroxide catalyst and subsequently a capping agent hexamethyl
disiloxane into the container, and then performing reduced pressure
distillation to obtain amino
silicon oil; (2) dissolving the amino
silicon oil into a
solvent, adding the mixture into
epichlorohydrin, stirring and heating to react under the protection of
nitrogen, and removing the
solvent by
steaming to obtain an
intermediate product; and (3) uniformly mixing N,N-dimethyl-decanamide and the
solvent to obtain a mixture, stirring with heating, adding the
intermediate product dropwise into the mixture under the protection of
nitrogen, performing a thermostatic reaction, and removing the solvent by
steaming to obtain the product. The softener of the invention has high hydrophilicity and high stability; fabric processed by the softener has excellent soft handfeel, high hydrophilicity, low yellowing,
antibacterial property and the like; and the softener is simple to prepare and is suitable for industrial production.