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Naslov:Analysis of the oxidation of cellulose fibres by titration and XPS
Avtorji:Fras Zemljič, Lidija (Avtor)
Johansson, Leena Sisko (Avtor)
Stenius, Peer (Avtor)
Laine, Janne (Avtor)
Stana-Kleinschek, Karin (Avtor)
Ribitsch, Volker (Avtor)
Datoteke:URL http://dx.doi.org/10.1016/j.colsurfa.2005.01.035
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Opis:The purpose of this study was to evaluate the effect of selective oxidation on the surface properties of cotton cellulose fibres. Four different methods to evaluate the accessibility, nature and content of ionisable acidic groups (charge) in the fibres were applied: potentiometric and conductometric titrations, polyelectrolyte adsorption and X-ray photoelectron spectroscopy (XPS). The results from this combination of methods show that two processes take place when the oxidation method is applied: elimination of low molecular mass non-cellulosic compounds and formation of new acidic groups in the cellulose chains. Which of these processes is predominating depends on oxidation time, but the first one is initially more important. Polyelectrolyte adsorption and XPS show that the surface concentration of acidic groups is considerably lower than the bulk concentration, i.e. during oxidation the content of carboxyl groups in the surface region decreases, while it increases in amorphous regions. The decrease is due to the dissolution of low molecular weight compounds; the increase is due to the formation of new acidic groups. The use of titration methods in combination with XPS appears to be a very useful tool for identification of the formation and distribution of ionic groups in cotton fibres and their surfaces.
Ključne besede:textile fibres, cotton fibres, cellulose fibres, oxidation, X-ray photoelectron spectroscopy, XPS, acid groups in fibres
Leto izida:2005
UDK:541.183:677.21.016.027.62
COBISS_ID:9655318 Novo okno
ISSN pri članku:0927-7757
NUK URN:URN:SI:UM:DK:E8Y6Q722
Število ogledov:1648
Število prenosov:95
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Ostalo
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Gradivo je del revije

Naslov:Colloids and surfaces
Skrajšan naslov:Colloids surf., A Physicochem. eng. asp.
Založnik:Elsevier
ISSN:0927-7757
COBISS.SI-ID:15328517 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:tekstilna vlakna, bombažna vlakna, celulozna vlakna, oksidacija, kislinske skupine v vlaknih, rentgenska fotoelektronska spektroskopija, XPS


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