 Alkali treatment on nettle fibers improved their oil absorbency, and the effects of treatment time, temperature, concentration, and solid liquor ratio were assessed through FTIR, TGA, SEM, and reusability tests, revealing that alkali-treated nettle fibers had a higher oil absorbency capacity compared to raw nettle fibers and other natural materials. This article was authored by SVGew in G. Thiligavify.