Preparation Of Organosilicon Modified Polyurethane And Its Application On Textile Soft Finishing

In this study,the nonlinear organosilicon waterborne polyurethanes with different molecular configuration were designed and prepared,the entanglement between organosilicone waterborne polyurethane and amino silicone oil with special molecular configuration was used to reduce the microphase separation during the compounding process and gain uniform and stable mixture of the two compounds.The nonlinear silicone waterborne polyurethane was prepared by active graft polymerization using polyhydroxyl polyether,triethanolamine,hydroxyl-terminated alkyl polysiloxane,isoflurone diisocyanate and other raw materials,and was took to modify amino silicone oil and form the mixture compound of the new softener,after that,the modified softener was applied to the after-processing of fabric.The structure of the products were analyzed by infrared spectrometer,~1H NMR spectra and gel chromatography.Testing results proved that the branched silicone waterborne polyurethane was successfully synthesized.By scanning electron microscopy（SEM）,energy dispersive spectroscopy（EDS）,thermogrgravity（TG）and differential scanning calorimetry（DSC）,the analysis of the complex and its finished fabric showed that the nonlinear organosilicone polyurethane can effectively form intermolecular entanglement with amino silicone oil,and significantly reduce the microphase separation.And the results show that:（1）The nonlinear silicone waterborne polyurethane prepared in this project can significantly improve the hydrophilicity,antistatic property and elasticity of brocade spandex fabric.Fabrics gained the best hydrophilic and elastic properties were treated by the non-ionic silicone modified polyurethane（POET-4L）among the POET series,which is the network micro-crosslinked non-ionic silicone modified polyurethane（POET-4L）,followed by chain planetary structure（POET-6L）and branched structure（POET-8L）.The hydrophilicity of brocade spandex fabric treated by POET-4L alone reached 15.1s and the crease recovery angle（the sum of longitude and latitude crease recovery angle）was 166.7°.In the antistatic test,the POET-6L treated fabric had the best performance,and the electrostatic decay time is1.4s.（2）Compared with the untreated fabric samples,the commercially available amino-silicone oil（AJ）and POET series composite finishing fabric also significantly improved its hydrophilicity,antistatic property and elasticity.samples treated by the POET-4L/AJ finishing agent（POET-4L/AJ）have the best comprehensive properties,with a hydrophilic time of 128.4s and a crease recovery angle of 156.1°.（3）In the series of cationic silicone modified polyurethane（TEOA）,the fabric treated with branched cationic silicone modified polyurethane（TEOA-8L）has the best elasticity and antistatic properties,followed by samples after-processed by the chain row star cationic silicone modified polyurethane（TEOA-6L）and network micro-crosslinking cationic silicone modified polyurethane（TEOA-4L）.The crease recovery angle of the fabric was 190.0°and the electrostatic decay time was 1.1s after finishing TEOA-8L on fabric.After post-treating TEOA-6L,the hydrophilic time of the fabric reached 10.3s.（4）After finishing the fabric by the mixed finishing agent（TEOA-8L/AJ）,the antistatic attenuation time of the fabric was 5.6s,and the hydrophilic time was 48.6s.The crease recovery Angle of fabric treated by TEOA-4L/AJ finishing agent was 140.1°.（5）The POET series,TEOA series and their composite with AJ can improve the smoothness,softness and puffiness of fabrics,but nearly on effect on the plush of the fabric.（6）Among those nonlinear organosilicone polyurethane with different molecular configurations,polymers with network micro-crosslinking structure possess the strongest the entanglement"binding effect"with amino silicone oil,followed by chain planetary structure and branched structure.