- 學位論文
抗菌濾材對生物氣膠控制效率之研究
Germicidal Effects of Antibacterial Filter on Bioaerosols
摘要
室內空氣中的懸浮微粒，如生物氣膠，目前常使用控制的方法之一為靜電濾材過濾，本實驗將使用不同抗菌的靜電濾材進行生物氣膠處理。實驗操作的變因包括生物氣膠種類(大腸桿菌、酵母菌及λ噬菌體)、濾材種類(不織布濾材、奈米矽片銀濾材及添加附著劑濾材)、載負時間(5、10、15、20、25、30分鐘)、相對溼度(30%及70%)、存活率實驗時間(5、10、15、20、25、30分鐘)等。過濾結果顯示，在相對溼度30%下，奈米矽片銀濾材對於E. coli、C. famata、λvirus的去除效率分別為39.9%、34.7%、13.8%，另外在相對溼度70%情況下對於E. coli、C. famata、λvirus的去除效率分別為39.7%、23.8%、13.8%；在添加接著劑濾材過濾結果在相對溼度30%下，E. coli、C. famata、λvirus的去除效率分別為37.5%、32.2%、13.5%，在相對溼度70%下，去除效率分別為38.1%、40.6%、7.4%。相對溼度的提升對於濾材過濾的效率有略微下降，原因推測為濾材表面帶電性所致。載負實驗將各濾材在不同載負時間後經由洗菌得知數據，進而探討三種氣膠於附著濾材上的載負特性及回收率。由結果得知生物氣膠在奈米矽片銀及添加接著劑濾材幾乎都無法生存，其中奈米矽片銀濾材上的生物氣膠存活率為零，此結果得知奈米矽片銀做為抗菌濾材為相當好的抗菌劑。從濾材的抗菌效率得知奈米矽片銀濾材有較好的抗菌效率，無論是在何種相對溼度，三種生物氣膠都有相當良好的抗菌效率(平均抗菌效率為87.6%至100%)，但生物氣膠的過濾效率偏低，因此濾材的綜合控制效率只有10%至40%。就使用抗菌劑方面，奈米矽片銀比奈米銀較不會對人體有傷害及產生細菌抗藥性，是可以替代奈米銀做為空氣清淨機的抗菌劑。
並列摘要
Suspended particles in indoor air such as bioaerosols, we often use electrostatic filter to control them. At this experiment,we would use different antimicrobial electrostatic filters to control bioaerosols. The experimental manipulation of variables contain type of Bioaerosol(E. coli、C. famata and λ vir)、type of filter (non-woven filter、filter of coating with AgNps、filter of coating with binder)、loading time(5、10、15、20、25、30minutes)、relative humidity (30% and 70%) and survival rate experiment(5、10、15、20、25、30minutes). The filtration result show the efficiency of AgNps filter at relative humidity 30% were 39.9% ( E. coli )、34.7% (C. famata)、13.8% (λ vir),and the efficiency of AgNps filter at relative humidity 70% were 39.7% ( E. coli )、23.8% (C. famata)、13.8% (λ vir).At another filtration result show the efficiency of binder filter at relative humidity 30% were 37.5% (E. coli )、32.2% (C. famata)、13.5% (λ vir), and the filtration result with the same filter at relative humidity 70% were 38.1% (E. coli )、40.6% (C. famata)、7.4% (λ vir).We had a conclusion when relative humidity enhancing would let filtration slightly decrease, because the surface charge of filter changed. At the loadind experiment, filter was used “washing” to collect bioaerosol from the filter. By this step, three kinds of bioaerosol data of filter loading trend and recovery rate would be known. Thereforce we got a conclusion, bioaerosol could not survival on the coating filter, that showed AgNps as an very good antibacterial chemical whether relative humidity changed or not(antibacterial efficiency was 87.6% to 100%). Because of the filtration efficiency was low, the overall efficiency had only 10% to 40%.On the use of antibacterial chemical, AgNps are less harmful to human body than nanosilver, so AgNps is an alternative to antimicrobial chemical of nanosilver as air cleaners.