| Summary: | 碩士 === 國立成功大學 === 環境工程學系碩博士班 === 96 === In this research, the surface modification of PET fiber applying low temperature plasma activation and acrylic acid grafting was studied. The operating parameters such as power, reactive or inert gas application, gas pressure, reaction in low temperature plasma activation treatment and the grafting temperature, acrylic acid concentration, grafting time in grafting treatment were also discussed in this work. The acrylic acid grafted PET fiber, (ion exchanger) were used in heavy metal removal. The adsorption behavior, the SEM-EDS and the FTIR analysis were applied to demonstrate the performance and the function of the grafted materials.
Results from the PET surface modification showed that the optimum treatment is oxygen plasma with the power of 1200W, 10 seconds treatment time and argon plasma with the power of 800W, 10 seconds treatment time. The maximum grafting percentage 5.26% was obtained with the condition of grafting temperature 90, acrylic acid concentration as 6M, grafting time 5hr. Results from the metal removal programs showed that the adsorption of copper and gallium were 4.266mg/g-polymer and 2.056mg/g-polymer respectively under upon optimum surface modification and grafting condition. The adsorption behaviors were characterized as Freundlish adsorption modal and adsorption heat was calculated as 13.74 kJ/mol. It showed the reaction to be an endothermic reaction.
With the advantage of low energy cost, convenient and environmental friendly process, the heavy metal removal by acrylic acid grafted PET fiber might be applied in wastewater treatments in near future.
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