Application Study On Surface Modification Of Polyester Fabric With Monochromatic Excimer Uv Radiation At Wavelength Of 222nm

Increasing demands in and abroad for specialized technical polymers, textiles and high-performance products as well as requests for environmentally processes and materials lead to an immense need for simple, but efficient methods for surface treatments. Excimer UV lamp is a large-area, high-power, monochromatic, and only one decade history UV source. The output power of the excimer UV lamp is several decuple larger than traditional high, middling and low pressure hydrargyrum UV light source. The wide of its emission spectrum is only 10nm, The excimer lamp is expected to be an effective method for functional fibre and continuous waterlessness enquments.In this paper we choose excimer lamp at wavelength of 222nm to treat PET fabric directly, measure the wetting, dyeing and strength properties of the treated fabric. The result shown that after irradiated, the dyeing and wetting properties of the PET fabric was increased. After long time irradiated, the strength of the fabric decreased and the surface became yellowish color. Surface morphology and chemical composition of fibers from untreated and irradiated fabrics were investigated by Fourier transform infrared(FTIR), X-ray photo-electron spectroscopy (XPS), scanning electron microscopy (SEM) , X-ray scattering (XRD). Form FTIR spectrum we can see that after 15min irradiation there was no new absorption peek shown. This indicated that the main chemical property was not changed, surface modification only limited on the surface. XPS study shown that different time UV irradiation result in an increase of the relative atomic concentration of oxygen but a decrease of carbon. With the increasing of treated time the concentration of C-C group was decreased. The concentration change of C-0 group was soft, but concentration of the C-0 group arrived at peek when treated for 60s. With the increasing of irradiation time the concentration of C=O group increased. Morphology changes of the 15-min irradiated polyester fabric surface were observed by SEM. The images show that the surface is comparatively roughness after 15min irradiation, this indicated the etching effect induced by excimer UV light. XRD study on the sample treated for 15min indicated that the changes of surface crystal structure, interplanar spacing was decreased.Then we grafted GAE onto the surface of the PET fabric at liquor phase, measured the wetting property. We got the best grafting process through Orthogonal experiment and single element analysis. XPS study shown the concentration of C-H and C-C group increased, this indicated the GAE was grafted onto the PET surface.At last we grafted oil acid wrapped Fe₃O₄ nano-particle onto the surface of PET and the product had a good washfastness property. The diameter of the oil acid wrapped nano-particle Fe₃O₄ were studied by TEM, the result shown the diameter of the magnetic nano-particle was less than 10nm. Fourier transform infrared(FTIR) studied the chemical structure of the oil acid wrapped magnetic nano-particle, the result indicated there were chemical bond between Fe₃O₄ and oil acid, formed a core(Fe₃O₄) and shell(oil acid) sphere. The surface of PET fabric that grafted nano-particle was studied by SEM, the images shown that there was lot of particle on the surface of the PET fabric.