20.500.12556/DKUM-20614 OBDELAVE ZA ZMANJŠANJE UV PROPUSTNOSTI MATERIALOV TREATMENTS FOR REDUCING UV PERMEABILITY OF MATERIALS Nevarnost ultravijoličnega sevanja postaja vse bolj resna in zaskrbljujoča težava za prebivalce našega planeta, zato je bil namen mojega diplomskega dela z naslovom »Obdelave za zmanjšanje UV propustnosti materialov«, raziskati vpliv postopka barvanja in impregnacije z UV absorberjem na UV propustnost oziroma UV zaščito materialov. Pri raziskavi sem uporabila tri različne materiale, bombaž, poliester in poliamid. Surovim materialom sem določila težo, gostoto in zračno prepustnost. Vzorce sem predhodno obdelala in jih na ta način pripravila za plemenitenje. Predhodno obdelane materiale sem impregnirala z UV absorpcijskim sredstvom v dveh koncentracijah in jih pobarvala z različnimi barvili v treh koncentracijah. Tako obdelanim materialom sem merila UV propustnost v UVA in UVB področju, jim določila ultravijolični zaščitni faktor (UZF) ter jih barvno-metrično ovrednotila. Na podlagi raziskave sem ugotovila, da večina konvencionalnih barvil poveča UV zaščito, medtem, ko posamezna fluorescentna barvila pri višjih koncentracijah negativno vplivajo na zaščito pred UV sevanjem. Ugotavljam tudi, da nam za ta namen izdelan UV absorber nudi odlično zaščito v večini primerov, razen pri zelo transparentnih materialih, kjer je prepustnost materiala prevelika, na kar nam kažejo tudi rezultati meritev UZF faktorja surove tkanine in zračna propustnost. Danger of UV radiation is becoming evermore serious and troublesome concern problem for the people of the planet Earth. Therefore, the purpose of my diploma work entitled »Treatments for reducing UV permeability of materials« was to research the impact of dyeing and impregnation procedures using UV absorber on UV permeability and UV protection of materials. In the study I was using three different materials, cotton, polyester and polyamide. Weight, density and air permeability were determined on raw materials. Samples were pre-treated and thus prepared for finishing. Pre-treated materials were impregnated with UV absorber in two concentrations and then dyed with different dyes in three concentrations. UV permeability in UVA and UVB area was measured and UPF was determined. Samples were also colormetricaly evaluated. Based on the research, I was concluded that most of conventional dyestuffs increase UV protection, while the individual fluorescent dyestuffs at higher concentrations have a negative effect on protection against UV radiation. I also note that UV absorber made for this purpose provides excellent protection in most cases, except in a very transparent material where the permeability of material is too large. This was also expected from the UPF factor measurements of raw material and air permeability results. UV zaščita bombaž poliamid poliester barvila UZF UV protection Cotton Polyamide Polyester Dyestuffs UPF true true false [L. Luketič] Slovenski jezik Angleški jezik Diplomsko delo 2011-09-26 09:51:54 2011-10-12 12:38:34 2022-04-14 08:05:20 2023-12-27 03:10:12 2011 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677.21.027.62(043.2) 16190230 URN:SI:UM:DK:GRNVZ3KF UNI_Luketic_Liljana_2011.pdf UNI_Luketic_Liljana_2011.pdf 1 53300F95597E6652ACDCF1BA9FEC37B7 73dc82ef4c90921b6dd6377b9062bfd3b7a07204bf29722a6b7f9bd188779581 a9359c26-7c05-11eb-bb7a-00155d0001ca 20.500.12556/dkum/f8ddd88d-db0b-4cd6-9958-9cc2acceed78 https://dk.um.si/Dokument.php?lang=slv&id=25648 Fakulteta za strojništvo 0 0 0