| 摘要: | 利用奈米纖維濾材過濾為有效處理空氣中細及超細懸浮微粒之控制技術。在
眾多製備奈米纖維之技術中，靜電紡絲為一種簡單且可行之技術。可藉由調整不同操作參數而改變其帄均纖維直徑、纖維基重、濾材厚度以及填充密度等，以評估奈米纖維濾材各種物理特性與氣膠過濾表現之關係。
在眾多用以靜電紡絲之原料物質中，聚丙烯腈(Polyacrylonitrile,PAN)為一種具有強韌特性之聚合物，過去文獻顯示其所製成之電紡濾材，其帄均纖維直徑大多介於250 奈米以上，雖有不錯之氣膠過濾表現，但卻鮮少有關於藉由調整電紡參數製備出 PAN 奈米纖維濾材並應用於評估氣膠過濾之表現。因此本研究詴利用靜電紡絲系統製備 PAN 奈米纖維濾材，並在不同溶液濃度、施加電壓以及收集時間等電紡操作參數下以不織布作為基材製成過濾濾材。實驗將利用掃描式電子顯微鏡觀察帄均纖維直徑、濾材厚度、纖維基重以及填充密度等濾材之物理特性，研究各操作參數對於製備奈米纖維之影響。本研究並實驗測詴各製程之電紡奈米纖維濾材，以同時考慮微粒貫穿率及濾材壓降之過濾效能指標(Quality Factor, qF)評估濾材對於細及超細懸浮微粒之過濾表現。藉由綜合探討電紡參數與過濾效能指標之關係，以期獲得能夠達到較佳過濾表現之 PAN 濾材之製備參數。;Filtration is a control technique for effectively handling fine and ultrafine aerosols in the air.Electrospinning is a simple and feasible technique among many techniques for preparing nanofibers. The average fiber diameter, fiber basis weight, filter thickness, and packing density can be changed by adjusting different operating parameters to evaluate the relationship between the various physical properties of the nanofiber filter and the performance of the aerosol filter.
Among many polymer materials used for electrospinning, polyacrylonitrile (PAN) is a polymer with strong properties. In the past, the literature showed that although the
electrospinning filter has a good performance for aerosol filtration, the average fiber diameter is mostly more than 250 nm. However, in the past, there was a few studies
about preparation of PAN nanofiber filters by adjusting electrospinning parameters and application in evaluation to performance of the aerosol filter.
Therefore, in this study, PAN nanofiber filters were prepared by using an electrospinning system, and non-woven fabrics were used as the filter media for adjusting electrospinning operation parameters such as the applied voltage and the collection time. Experiments will use scanning electron microscopy to observe the physical characteristics of the average fiber diameter, filter thickness, fiber basis weight, and packing density, and to study the effect of various operating parameters on the preparation of nanofibers. In this study, the electrospinning nanofiber filter of each process was tested and the filter performance of the filter for fine and ultrafine aerosols was evaluated by considering the particle penetration and filter pressure drop (Quality Factor, qF). By comprehensively discussing the relationship between
electrospinning parameters and quality factor, in order to obtain the preparation parameters of PAN filter materials that can achieve better filtration performance. |
