12 Tekstilec, 2019, 62(1), 12-22 DOI: 10.14502/Tekstilec2019.62.12-22 Corresponding author/Korespondenčna avtorica: Prof dr. Barbara Simončič E-mail: barbara.simoncic@ntf.uni-lj.si Tanja Furlan, Ivan Nešković, Nina Špička, Barbara Golja, Mateja Kert, Brigita Tomšič, Marija Gorjanc, Barbara Simončič University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva 12, 1000 Ljubljana, Slovenia Multifunctional Hydrophobic, Oleophobic and Flame-retardant Polyester Fabric Večfunkcionalna vodo- in oljeodbojna ter ognjevarna poliestrska tkanina Original Scientific Article/Izvirni znanstveni članek Received/Prispelo 11-2018 • Accepted/Sprejeto 1-2019 Abstract Technical textile materials with multifunctional protective properties represent one of the largest and fast growing segments of the textile industry. Multifunctional water- and oil-repellent and flame-retardant coat- ing on polyester (PES) fabric was prepared in this research using fluoroalkyl-functional siloxane (FAS) as the water- and oil-repellent finishing agent and organophosphonate (OP) as the flame-retardant agent. A fin- ishing solution containing FAS and OP of appropriate concentrations was applied to the untreated and ox- ygen plasma-treated PES fabric samples using the pad-dry-cure method. For comparison, single-compo- nent FAS and OP finishing solutions were applied to the fabric samples under the same conditions. The coated PES samples were washed under standard conditions. The morphological, chemical and functional properties of the coated PES samples were determined with scanning electron microscopy, Fourier trans- form infrared spectroscopy, wet pick up, liquid contact and sliding angles measurements as well as oil re- pellence and vertical burning tests. The results reveal that oxygen plasma treatment prior to finishing sig- nificantly increased the wettability of the PES fibres, which directly resulted in increased concentration of the absorbed finishing agents. This treatment enabled the creation of PES fabric with simultaneous super- hydrophobic, oleophobic and flame-retardant properties. Although the superhydrophobic and oil-repellent characteristics of the coating were preserved after washing, the flame retardancy was hindered because of the removal of OP in the washing bath. Keywords: polyester fibre, finishing, multifunctional properties, water and oil repellence, flame retardancy, washing fastness Izvleček Tehnični tekstilni materiali z večfunkcionalnimi zaščitnimi lastnostmi so eden največjih in najhitreje rastočih se- gmentov tekstilne industrije. V raziskavi so pripravljene večfunkcionalne vodo- in oljeodbojne ter ognjevarne apre- ture na poliestrski (PES) tkanini z uporabo fluoroalkil-funkcionalnega siloksana (FAS) kot vodo- in oljeodbojnega apreturnega sredstva in organofosfonata (OP) kot ognjevarnega apreturnega sredstva. Apreturna kopel, ki je vključevala FAS in OP ustrezne koncentracije, je bila nanesena na neobdelano in s plazmo kisika predhodno ob- delano tkanino PES s postopkom, ki je vključeval impregniranje, sušenje in kondenziranje. Za primerjavo sta bili na tkanino PES pri enakih pogojih naneseni tudi enokomponentni apreturni kopeli s FAS oziroma z OP. Apretira- ni vzorci tkanine PES so bili oprani pri standardnih pogojih. Morfološke, kemijske in funkcionalne lastnosti apreti- ranih vzorcev so bile določene z vrstično elektronsko mikroskopijo, infrardečo spektroskopijo s Fourierjevo trans- formacijo, nanosom kopeli, stičnimi koti in koti zdrsa tekočin, oljeodbojnostjo in ognjevarnostjo. Iz rezultatov je razvidno, da je obdelava s plazmo kisika pred apretiranjem močno povečala omočljivost vlaken PES, kar je nepo- sredno vplivalo na povečanje koncentracije adsorbiranih apreturnih sredstev. Takšna kombinacija obdelave je