- 學位論文
電漿改質聚丙烯纖維接枝硫脲吸附重金屬之穩定性研究
Study of stability for heavy metal absorption by plasma modified polypropylene fiber graft thiourea
摘要
本研究利用常溫電漿活化PP纖維表面，經由兩種接枝方式將不同單體接枝於PP纖維表面。其一接枝方法為電漿活化纖維表面後，先接枝丙烯酸(Acrylic Acid)單體，另一方法為接枝丙烯酸(AAc)再聚合硫脲(Thiourea)單體探討其去除溶液中重金屬之可行性，並以FTIR分析其表面官能基之變化。而電漿操作參數經由水分散失率及過氧化基量測結果，使用O2、Ar、N2 電漿、功率1000W、氣體壓力200mtorr、改質時間10秒之操作參數對PP纖維表面進行活化。 將兩種不同接枝方式吸附重金屬，由重金屬去除率結果顯示，電漿活化PP纖維表面接枝丙烯酸之PP纖維其去除效果為3.39~1.76(mole/g)，而經由NaOH處理其吸附效能可增加至4.33(mole/g)，於HNO3處理後會破壞其表面降低吸附能力0.91(mole/g)。經由接枝聚合丙烯酸與硫脲之PP纖維其去除效果為8.89~2.96(mole/g)。而經由NaOH處理其吸附效能為6.66(mole/g)，於HNO3處理後會破壞其表面降低吸附能力3.32(mole/g)。在溫度上接枝丙烯酸之PP纖維相較接枝丙烯酸與硫脲有較好之穩定性。經由FTIR與SEM表面分析之後，可以分析出接枝硫脲與丙烯酸單體後鍵結的改變，證實各單體接枝成功。由上述結果可知，PP纖維經電漿活化接枝不同單體，可去除水中重金屬。
並列摘要
For the PP fiber, the surface activation was modified with the Ar, N2, and O2 plasmas at a condition of 1000 W of power, 200 mtorr of air pressure, and 10 sec of reaction time. In one of the grafting experiments (the first approach), the acrylic acid monomer was directly grafted onto the surface of PP fiber after the plasma activation . In the other grafting experiment (the second approach), the activated PP fiber was grafted with acrylic acid (AAc), followed by the Thiourea monomer grafting procedure. Both products were used for heavy metal removal experiments, and the surface analysis of these PP fabrics analyzed with Fourier Transform Infrared spectroscopy (FTIR) demonstrated the deviation of the function grafted materials. Results of copper adsorption experiments showed that the removal efficiencies were 3.39~1.76(mole/g) when the acrylic acid the first approach experiments. The Cu absoration experiments 4.33(mole/g) when Immersed into NaOH. the Cu absoration dincreased to 0.91(mole/g) by immersed into HNO3. On the other hand, the Cu removal efficiency increased to 8.89~2.96(mole/g) when the grafting procedure fellowed the AAc and Thiourea monomer grafting sequence in the second approach experiment. The Cu absoration experiments 6.66(mole/g) when immersed into NaOH.The Cu absoration dincreased to 3.32(mole/g) when immersed into HNO3.The graft with AAc PP fiber of stability for Cu adsorption on the temperature.The results of FTIR and SEM analyses showed the structure changes of the PP fiber and confirmed the monomer grafting. It was concluded that the PP fiber surface could be grafted with different monomers after plasma activation and the modified products could be potential adsorption materials for heavy metal removal in wastewater treatments.