| Abstract:The morphology analysis and dispersion properties in water of three kinds of PET (polyester) fibers with different cross sectional shapes (circular, trilobal and feng-shape) were studied. The effect of PET fiber’s cross sectional shape on the filtration performance of liquid filter media was investigated by preparing the filter media via mixing the PET fiber with hardwood flash dried pulp. The results showed that when the PET fiber content was the same, compared with the filter media containing circular PET fiber, the filter media with trilobal or feng-shaped PET fiber had relatively better filtration performance, including filtration efficiency, flow resistance and pollutant adsorbing capacity. The trilobal fiber was more conducive to improve the filtration efficiency of filter media, while the feng-shaped fiber was more beneficial to increase the pollutant adsorbing and reduce the filtration resistance of filter media. Furthermore, the pollutant adsorbing of filter media containing 40% trilobal-shaped and feng-shaped PET fibers were respectively increased by 32.1% and 26.5%, compared with that containing the same amount of round PET fibers. Simultaneously, the filtration efficiency for 14 μm particle increased by 13.1% and 6.1%, respectively. When the flow rate was 4 L/min, the flow resistance decreased by 26.6% and 28.5%, respectively. |
