The effects of molecular tanglement between traditional polysiloxane softener and nonlinear polysiloxane-modified polyurethane to the hand feeling of textile

Because of the serious separation of ammonia silicone oil and general hydrophilic resin in the drying process of fabric surfaces, it is difficult to use the composite to improve the hydrophilicity and hand feeling of textile. In this paper, the nonlinear polysiloxane-modified polyurethane was prepared by trihydroxy polyether, hydroxyl-terminated polysiloxane and isoflurane ketone diisocyanate, and blending with amino silicone oil. The results of SEM, EDS, TG and DSC revealed that nonlinear polysiloxane-modified WPU can effectively entangle with amino silicone oil in molecular level by common hydrophobic long chain (polysiloxane), which reduces the migration capacity of the auxiliary macromolecules transfer to the hydrophobic fiber gap effectively. Compared with the traditional amino-modified polysiloxane softener, the hydrophilicity and elasticity of the treated fabric with POET-8L/AJ have been significantly improved. The hydrophilicity of finished fabric reached from 360.8 to 97.9 s, and the crease recovery angle was raised from 9.8° to 62.0°, showing a new high elastic and supple style.