Abstract: Polyester has properties of wash and wear, but a low wettability. The results showed that the super-hydrophobicity of polyester fabrics were quickly transformed to super-hydrophilic fabrics via UV radiation/nano- TiO2 .At the concentration 40g/L of the nano-TiO2 and UV irradiation 60min,the water contact angle of the super-hydrophobicity of polyester fabrics could decrease to zero in 4.11 second. The result of SEM testified that the surface of polyester fiber was rough and has another material; Reflection ultraviolet spectrum excluded the possibility that the nano-TiO2 adhered to the polyester fiber; Infrared spectrum suggested the surface of polyester fiber was oxygenated by air oxygen; X-ray diffraction showed that the crystallinity of polyester fabrics decreased a little; DSC showed that the thermal stability of the polyester fabric increased. The whiteness and rigidity of modified polyester fabrics kept well, and the resilience of fabrics increased a little. This modification technology is not only simple, and has a good effect, but also a green modified method, and has good applications.

Key words: ultraviolet irradiation and nano-TiO2, polyester fabric, hydrophilic, oxidization, wearability