Sungkajuntranon Krisaneeya, Sribenjalux Pipat, Supothina Sitthisuntorn, Chuaybamroong Paradee
Program in Biomedical Sciences, Khon Kaen University, Thailand.
Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Thailand.
J Photochem Photobiol B. 2014 Sep 5;138:160-71. doi: 10.1016/j.jphotobiol.2014.05.019. Epub 2014 Jun 2.
5% Degussa P25 TiO2 was spray-coated onto black-light and white-light fluorescent lamps, using five different binders, namely DURAMAX B-1000, DURAMAX D-3005, silane-69, and two polyethylene glycols with molecular weight 1000 (PEG-1000) and 700 (PEG-700). The coated lamps were tested with Staphylococcus epidermidis, Escherichia coli, spores of Bacillus subtilis and spores of Aspergillus niger. It was found that 0.5% B-1000 and 1% PEG-1000 gave the highest inactivation rates: 93-96% from coated black-light lamps and 85-88% from coated white-light lamps for bacteria. In the case of spores, 70-72% and 55-57% inactivation rates were recorded from coated black-light and coated white-light lamps, respectively. The effects of UVA irradiance and face velocity were also examined. Significant improvement was observed from coated white-light lamps when the UVA irradiance increased. High face velocity adversely affected microorganism inactivation.
将5%的德固赛P25二氧化钛使用五种不同的粘合剂喷涂到黑光和白光荧光灯上，这五种粘合剂分别是杜拉马克斯B - 1000、杜拉马克斯D - 3005、硅烷-69，以及两种分子量分别为1000（聚乙二醇-1000）和700（聚乙二醇-700）的聚乙二醇。用表皮葡萄球菌、大肠杆菌、枯草芽孢杆菌孢子和黑曲霉孢子对涂覆后的灯管进行测试。结果发现，0.5%的B - 1000和1%的聚乙二醇-1000具有最高的灭活率：涂覆黑光管对细菌的灭活率为93% - 96%，涂覆白光管对细菌的灭活率为85% - 88%。对于孢子，涂覆黑光管和涂覆白光管的灭活率分别为70% - 72%和55% - 57%。还研究了紫外线A辐照度和表面风速的影响。当紫外线A辐照度增加时，涂覆白光管的效果有显著改善。高表面风速对微生物灭活有不利影响。
