The antifungal coating of different wall finishing towards growth inhibition of aspergillus niger

• 第一著者: Parjo, Umi Kalthsom
• フォーマット: 学位論文
• 言語: 英語; 英語; 英語
• 出版事項: 2018
• 主題: QD241-441 Organic chemistry
• オンライン･アクセス: http://eprints.uthm.edu.my/277/

Indoor air quality (IAQ) is an essential factor which directly affects human and the comfort of building occupants. The concentration of fungi, humans, animals and others contribute to indoor air pollutants and can cause a syndrome known as sick building syndrome. In this study, the growth of fungi in a lecturers’ room at Universiti Tun Hussein Onn Malaysia (UTHM) was investigated with the application of three types of antifungals namely potassium sorbate, calcium benzoate and zinc salicylate. The study was conducted to enumerate and evaluate the growth of Aspergillus niger (A. niger). Four different types of wall finishings were utilized; namely acrylic paint, glycerol-based paint, thin wallpaper and thick wallpaper. These wall finishings were applied after being incorporated with antifungals on three different building materials; namely plasterboard, concrete and wood. Each sample was placed with 50μl of the spore suspension on a petri-dish containing malt extract agar. The sample was incubated at the relative humidity and temperature of 90% and 32oC respectively, based on the results of preliminary work. A visual assessment was made according to ASTM D5590-00 (2012). The results of antifungal coating resistance test showed that the best antifungal to remediate A. niger is potassium sorbate applied on thick wallpaper surfaces for plasterboard with growth percentages of about 47%. However, in the assessment of the inhibitory activity of A. niger, the results showed that concrete treated by zinc salicylate performed better than other antifungals used to inhibit A. niger with 50% on thick wallpaper covering. From this investigation, it was shown that the potassium sorbate antifungal was effective in decreasing the growth rate of the A. niger. However, the effectiveness of the results also depended on the construction building materials used. This study provides a reference in the inhibition of A. niger using different antifungals in various types of building materials. In addition, the effectiveness of antifungal compounds used in this study also exhibited enormous potential to be used as additives to prevent indoor fungal growth in Malaysia’s construction industry.