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Azlan Kamari,Siti Najiah Mohd Yusoff,Siew Tin Susana Wong,Norjan Yusof,Hidayatulfathi Othman,Mohd Zobir Hussein,Esther Phillip 한국섬유공학회 2022 Fibers and polymers Vol.23 No.8
In this study, poly(ε-caprolactone) lipid-core nanocapsules containing cinnamaldehyde were prepared byinterfacial deposition of pre-formed polymer and used for the first time in mosquito-repellent spray formulations on cotton,polyester and tetoron cotton fabrics. The synthesized nanocapsules formulations were characterized by dynamic lightscattering and Fourier transform infrared spectroscopy analyses. The retention of cinnamaldehyde-loaded lipid-corenanocapsules (Cin-LNCs) on cotton and polyester fabrics, before and after washing and heating, was studied using scanningelectron microscopy (SEM) and UV-Vis spectrometry. The repellency effect of fabrics treated with the Cin-LNC formulationagainst mosquitoes was evaluated in the laboratory using the Excito chamber method and in field trials conducted on rubberfarms. The SEM images and UV-Vis spectrometry results suggested that the fabrics treated with the Cin-LNC formulationshowed outstanding resistance to washing and heating. No skin irritation by treated fabrics was recorded in human volunteerswho took part in a 4-hour patch test. The treated fabrics exhibited good mosquito repellency (greater than 96 %) and were stillable to offer around 30 % repellency even after five cycles of washing and heating. The results indicate that the use of poly(ε-caprolactone) lipid-core nanocapsules is a promising technique to improve the fastness and longevity of repellents onfunctional textiles for insect control.