20.500.12556/RUL-176819 Multifunctional properties of cotton fabric tailored via green synthesis of TiO$_2$/curcumin composite Večfunkcionalne lastnosti bombažne tkanine, pripravljene z zeleno sintezo kompozita TiO$_2$/kurkumin In this study, a novel green process was developed to produce a multifunctional cotton (CO) fabric incorporating TiO$_2$/curcumin composites that simultaneously provides UV protection and photocatalytic performance. For this purpose, TiO$_2$ was synthesised using the sol–gel process; loaded with the natural colourant curcumin as a visible light absorber at two temperatures, i.e., 70 and 350 °C; and applied to the CO fabric via the pad–dry–cure process. For comparison, TiO$_2$ was synthesised without curcumin under the same conditions. The synthesis conditions at 70 °C ensured the formation of predominantly amorphous TiO$_2$, while curcumin promoted TiO$_2$ crystallisation despite the low synthesis temperature. A 350 °C synthesis temperature was high enough to form the polymorphic TiO$_2$ anatase phase. Although the increase in synthesis temperature and the presence of curcumin in the composites caused a bathochromic shift in light absorption, the photocatalytic activity of all samples was mainly driven by UV light. Chemically modifying the CO fabric significantly reduced the light transmittance of the samples, with the highest absorption of UV light obtained for the sample containing the TiO$_2$/curcumin composite synthesised at 70 °C. This sample provided excellent UV protection with a UPF value of 51.6. All chemically modified CO samples showed photocatalytic activity, degrading coffee stains and decolourising methylene blue and Rhodamine B dye solutions. The highest photocatalytic efficiency and recyclability were obtained again for the CO sample with the TiO$_2$/curcumin composite synthesised at 70 °C, demonstrating the synergistic effect between TiO$_2$ and curcumin in the composite prepared under these synthesis conditions. Razvit je bil nov zelen postopek za izdelavo večfunkcionalne bombažne (CO) tkanine z vgrajenimi kompoziti TiO$_2$/kurkumin, ki hkrati zagotavlja UV-zaščito in fotokatalitsko delovanje. V ta namen je bil sintetiziran TiO$_2$ s hidrotermalno podprtim postopkom sol-gel v prisotnosti naravnega barvila kurkumina kot stabilizatorja in absorberja vidne svetlobe pri dveh temperaturah, in sicer 70 in 350 °C, ter nanesen na CO-tkanino z impregnirnim postopkom. Za primerjavo je bil TiO$_2$ sintetiziran pri enakih pogojih brez prisotnosti kurkumina. Pogoji sinteze pri 70 °C so omogočili nastanek pretežno amorfnega TiO$_2$, je pa prisotnost kurkumina podprla kristalizacijo TiO$_2$ kljub nizki temperaturi sinteze. Temperatura sinteze 350 °C je bila dovolj visoka za tvorbo TiO$_2$ v polimorfni fazi anatasa. Čeprav sta zvišanje temperature sinteze in prisotnost kurkumina v kompozitih povzročila batokromni premik absorbirane svetlobe, je bila fotokatalitska aktivnost vseh vzorcev pogojena predvsem z UV-svetlobo. Kemijska modifikacija CO-tkanine je bistveno zmanjšala prepustnost svetlobe vseh vzorcev, pri čemer je bila najvišja absorpcija UV-svetlobe dosežena pri vzorcu, ki je vseboval kompozit TiO$_2$/kurkumin, sintetiziran pri 70 °C. Ta vzorec je zagotovil odlično UV-zaščito z UPF vrednostjo 51,6. Vsi kemijsko modificirani CO-vzorci so bili fotokatalitsko aktivni, kar je privedlo do razgradnje madežev kave in razbarvanja raztopin barvil metilensko modro in Rhodamine B. Največji fotokatalitska učinkovitost in sposobnost ponovne uporabe sta bili tudi v tem primeru doseženi pri CO vzorcu s kompozitom TiO$_2$/kurkumin, sintetiziranim pri 70 °C, kar kaže na sinergijski učinek med TiO$_2$ in kurkuminom v kompozitu, pripravljenim pri teh sinteznih pogojih. multifunctional cotton titanium dioxide Curcuma longa green synthesis večfunkcionalni bombaž titanov dioksid Curcuma longa zelena sinteza true false true Angleški jezik Slovenski jezik Članek v reviji 2025-12-11 10:27:30 2025-12-11 11:53:35 2025-12-24 03:59:43 0000-00-00 00:00:00 2025 0 0 Str. 82–99 no. 1 Vol. 68 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677 0351-3386 10.14502/tekstilec.68.2024135 226040835 07-DOI_10.14502_tekstilec.68.2024135_82-99.pdf 07-DOI_10.14502_tekstilec.68.2024135_82-99.pdf 1 D607D85DEBA18035B83D0E81BE600C2A db38ba58a4007add234cd5f9d470aee00ff461c449e4f0eb63b055fdd934eeda 3a26e840-d673-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=223410 https://journals.uni-lj.si/tekstilec/article/view/20630 0 d6062d07-d743-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=223513 Naravoslovnotehniška fakulteta Tekstilec 0 0 0