Quaternary ammonium monomer grafting polymerization under ultraviolet irradiation and adsorption of polypropylene nonwovens

Using gamma-methacrylamidopropyl trimethyl ammonium chloride (MAPTAC) as initiator, the ultraviolet-irradiated grafting polymerization and dye adsorption of polypropylene nonwovens were carried out. The microstructure and properties of the resulted fabrics were characterized through Fourier transform infrared, thermogravimetry, and scanning electron microscopy. The results show that the quaternary ammonium monomer is successfully grafted onto the surface of polypropylene fabrics. The dye removals reach 95% for the fabric with the grafting yield of 89.6% at 35°C, 45°C and 50°C respectively. The desorption process of adsorbed fabric was realized by the sequential immersion of cationic surfactant-ethanol. The grafted fabrics can be applied for the dye adsorption repeatedly over 10 times with the dye removal degree over 99% each.