Lastnosti sušene mikro- in nanofibrilirane celuloze

Vesna Žepič (Author), Aleš Hančič (Author), Ida Poljanšek (Author), Primož Oven (Author)

Abstract

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

Keywords

celuloza;MFC;NFC;zračno sušenje;liofilizacija;mikroskopija;spektroskopija;

Data

Language:	Slovenian
Year of publishing:	2013
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	UL BF - Biotechnical Faculty
UDC:	547.458.8
COBISS:	2109833
ISSN:	0024-1067
Views:	1435
Downloads:	417
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Properties of dried micro- and nanofibrillated cellulose
Secondary 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.
Secondary keywords:	cellulose;MFC;NFC;air drying;freeze drying;microscopy;spectroscopy;
File type:	application/pdf
Type (COBISS):	Not categorized
Pages:	str. 65-69
Volume:	ǂLetn. ǂ65
Issue:	ǂšt. ǂ1/2
Chronology:	2013
ID:	9077421