| Summary: | 碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 103 === This study is focused on the Feasibility study of applying electrospinning to recycle waste polystyrene into ion exchange membrane. Discussion includes comparison of polystyrene and waste polystyrene materials reconstituted fiber filters. Electrospinning program parameters considered include dissolved polystyrene and waste polystyrene solvent tetrahydrofuran (THF) and dimethylformamide (DMF) the mixing ratio, polymer concentration in the solution, the polymer solution injection flow rate, applied voltage and the needle and from the collection plate. Electrospinning fibers of less than 300nm in diameter is target. Through the results, Polymer solution concentration 50 g / l, supply voltage 12 KV, flow rate 1.0 ml / h and the gap distance 5 cm is the Polystyrene electrospun fiber optimum operating conditions. Get polystyrene electrospun fiber diameter of 253 nm. The above polystyrene optimum operating conditions applied directly waste polystyrene, Get electrospun fiber diameter of 443 nm. Use immersion sulfonated program make sulfonate attached to the fiber branched. The fibers will have an ion exchange capacity and heavy metal removal capability. Sulfonated fiber samples depending on the time (5,10,20,40 and 80 minutes) sequentially immersed in 98%, 70%, 50%, 25% and 5% sulfuric acid solution. The final rinse was done in DI water.Fourier infrared spectroscopy (FTIR) to identify sulfonate on fiber branched chain. Polystyrene and waste polystyrene electrospun fibers sulfonate time was 10 minutes and 20 minutes SO3H then attach the most obvious level. By acid-base titration to calculate the ion exchange capacity (IEC). Polystyrene and waste polystyrene electrospun fiber optimum ion exchange capacity of sulfonated occurred 10 minutes, respectively, 32.91 and 27.65 (m.mol / g). Finally, electrostatic spinning fiber removal experiment copper ions in aqueous solution, obtained polystyrene and Styrofoam electrospun fibers optimum copper ion removal capacity. Which occurred at 20 minutes and sulfonated 10 minutes, copper ion removal rates were 18.17 and 57.09 (mg Cu2 + / g).This study demonstrates that in order to recover waste polystyrene as electrostatic spinning fiber materials, After the manufactured electrospun fibers with sulfonated.It can be used as ion exchange filters, for the removal of heavy metals in water.
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