20.500.12556/RUL-73710 Lastnosti sušene mikro- in nanofibrilirane celuloze Properties of dried micro- and nanofibrillated cellulose V študiji smo preiskali in analitično ovrednotili morfološke in strukturne lastnosti suhe mikro- (MFC) in nanofibrilirane(NFC) celuloze, ki smo ju pridobili po zračnem sušenju in po sušenju z zamrzovanjem vodnih suspenzij MFC in NFC. Morfološke lastnosti sušene MFC in NFC smo raziskali z vrstično elektronsko mikroskopijo (FE-SEM), strukturne lastnosti pa z infrardečo spektroskopijo (FT-IR). Pri zračnem sušenju vodne suspenzije fibrilirane celuloze nastane prosojen film naključno urejenih fibril, pri sušenju z zmrzovanjem pa fibrilirana celuloza agregira v 80 μm velike grobe praškaste delce. Preiskave z FT-IR niso pokazale razlik med različno sušenimi vzorci fibrilirane celuloze. Uporabljeni metodi sušenja pomembno vplivata na morfologijo suhe MFC in NFC, ne pa tudi na njuno kemijsko strukturo, kar potrjujejo identični FT-IR spektri The aim of this study was to investigate and analytically evaluate morphology and structural properties of dried micro-(MFC) and nanofibrillated (NFC) cellulose, obtained after air and freeze drying of aqueous MFC and NFC suspensions. Morphological and structural properties of the dried micro- and nanofibrillated cellulose were examined by scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FT-IR). FE-SEM revealed dense textured translucent film of randomly arranged fibrils in air dried samples, while freeze drying of MFC and NFC suspension resulted in formation of irregularly shaped agglomerates with dimensions up to 80 μm. The drying process of MFC and NFC, however, did not lead to a change in chemical structure since the FTIR spectra were identical. celuloza MFC NFC zračno sušenje liofilizacija mikroskopija spektroskopija cellulose MFC NFC air drying freeze drying microscopy spectroscopy true false false Slovenski jezik Angleški jezik Delo ni kategorizirano 2015-11-27 05:29:58 2015-11-27 05:29:59 2022-08-01 18:22:47 0000-00-00 00:00:00 2013 0 0 Str. 65-69 št. 1/2 Letn. 65 2013 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 547.458.8 0024-1067 2109833 2109065 zepic_gozd_in_les.pdf zepic_gozd_in_les.pdf 1 E2F8F6CDD2554C1A8D211BA408B84D17 ca0cedaa1c2efbbd8eda3c4bd8204ea7049ea984ce1146dc0034d5398085961a 6d1d2784-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/c66dcaca-74b2-4364-ac12-583d872d99a3 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=100916 Biotehniška fakulteta Les 0 0 0