24 KB545 KB21 KB200020242012Čopič, MartinDevetak, MihaDrevenšek Olenik, IrenaPeršin, ZdenkaRigler, MartinSkoporc, NejcStana-Kleinschek, Karinštevilka:1letnik:46str. 69-73COBISSID:15775254ISSN:1580-2949URN:URN:NBN:SI:doc-YMVMR7IZenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijenabrekanjeoptical polarization microscopyoptična polarizacijska mikroskopijaplasma treatmentplazemska obdelavaviscoseviskozaEffects of plasma treatment on water sorption in viscose fibres| Učinki plazemske obdelave na sorpcijo vode v viskoznih vlaknih|We investigated water sorption in viscose nonwoven fibres manufactured by Tosama d.d. with the surface density of 175 g/m2. A comparison between untreated fibres and by oxygen plasma treated fibres was made using optical polarization microscopy. Plasma treatment was done for 10 minutes at pressure of 75 Pa at current of 250 mA at the power of 500 W. Swelling was characterized by measurements of fibre diameter. Modifications of intensity of the polarized light transmitted through the fibre were measured as a function of time of exposure to water. Characteristic swelling and intensity modification times were resolved for untreated and oxygen plasma treated fibres. The swelling time of oxygen plasma in comparison to untreated plasma is reduced by the factor of 0.54 and intensity change time by the factor of 0.4. From the characteristic swelling and intensity change times it was concluded that oxygen plasma treatment of viscose increases the speed of water sorptionProučevali smo sorpcijo vode pri vlaknih v viskozni kopreni, ki jo proizvaja podjetje Tosama d.d., s površinsko gostoto 175 g/m2. Primerjali smo neobdelana in s kisikovo plazmo obdelana vlakna z uporabo optično-polarizacijske mikroskopije. Plazemska obdelava je trajala 10 minut pri tlaku 75 Pa, toku 250 mA in pri moči 500 W. Nabrekanje viskoznih vlaken smo opazovali preko sprememb premera vlakna. Z optično polarizacijsko mikroskopijo smo merili spremembe intenzitete polarizirane svetlobe, ki potuje skozi vlakno med močenjem. Iz meritev na neobdelanih in s plazmo obdelanih vlaknih smo ocenili karakteristične čase nabrekanj vlaken in spremembe intenzitete polarizirane svetlobe, ki potuje skozi vlakna. Pri s plazmo obdelanih vlaknih se časi nabrekanja zmanjšajo za faktor 0.54 in čas spremembe intenzitete za 0.4. Iz meritev smo zaključili, da obdelava s kisikovo plazmo pohitri proces sorpcije vodeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije