Modification of polyamide fabric nano-TiO_2 prepared by low temperature hydrothermal method

Nano-sized titanium dioxide films prepared by hydrothermal precipitation method were first immobilized on the fiber surface of polyamide fabric using tetrabutyl titanate,and then the fabric was dyed with Remazol Brilliant Blue R-X.Scanning electron microscopy(SEM),X-ray diffraction(XRD),infrared spectroscopy(IR),X-ray photoelectron spectroscopy(XPS),differential scanning calorimetry(DSC) and thermal gravimetry(TG) were used to characterize the morphology,structure,and thermal stability of the fabrics before and after modification,and the reflectance spectrum,tensile property,water absorption,and dyeing property of the fabrics were measured.It was observed that after modification with tetrabutyl titanate by hydrothermal method,the fiber surface of the polyamide fabric was covered with anatase titanium dioxide particles with average size smaller than 20 nm,showing that chemical reaction had taken place between the fiber and titanium dioxide.As compared with the untreated fiber,the onset decomposition temperature of TiO2-coated fiber decreased,and anti-ultraviolet irradiation capability was improved significantly.The breaking strength and breaking elongation increased due to the contraction of the fabric.The water absorption changed a little.The color yield(K/S value) decreased slightly,but then increased after being washed with water.The color fastnesses to rubbing and color fastness to sunlight of the fabric were excellent.