Abstract
The purpose of this study was to develop acaricidal cotton fabrics grafted with eucalyptus oil-loaded microcapsules (EOMCs) produced from green resources. EOMCs showed a broad size distribution between 0.5 and 6.5 μm, and had the average diameter 1.8 μm. EOMCs exhibited nonporous spherical shapes and individually remained on cotton fibres. Through AATCC mortality tests against house dust mites (HDMs) (Dermatophagoides farinae), the treated cotton fabric containing EOMCs resulted in 98.7% mortality. Acaricidal efficiency was due to the large amount of oxygenated monoterpene, 1,8-eucalyptol (75.8%) and hydroxylated monoterpenes such as α-terpineol (3.6%), terpinen-4-ol (0.4%) and linalool (0.3%) found in eucalyptus oil. These compounds are effective in enhancing penetration into HDMs. EOMCs produced from safe and natural sources can serve as a replacement for synthetic acaricides in controlling the population of HDM, leading to positive impacts on the human health and environment.
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