Lastnosti sušene mikro- in nanofibrilirane celuloze

Žepič Bogataj, Vesna (author), Hančič, Aleš (author), Poljanšek, Ida (author), Oven, Primož (author)

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

• Language: Slovenian
• Keywords: celuloza, MFC, NFC, zračno sušenje, liofilizacija, mikroskopija, spektroskopija
• Work type: Not categorized
• Typology: 1.08 - Published Scientific Conference Contribution
• Organization: BF - Biotechnical Faculty
• Year: 2013
• Number of pages: Str. 65-69
• Numbering: Letn. 65, št. 1/2
• PID: 20.500.12556/RUL-73710
• UDC: 547.458.8
• ISSN on article: 0024-1067
• COBISS.SI-ID: 2109833
• Publication date in RUL: 27.11.2015

Record is a part of a proceedings

• Title: Gozd in les
• COBISS.SI-ID: 2109065

Record is a part of a journal

• Title: Les
• Shortened title: Les
• Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze
• ISSN: 0024-1067
• COBISS.SI-ID: 13940224

Secondary language

• Language: English
• Title: Properties of dried micro- and nanofibrillated cellulose

Abstract

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.

• Keywords: cellulose, MFC, NFC, air drying, freeze drying, microscopy, spectroscopy