Chemical binding of chitosan and chitosan nanoparticles onto oxidized cellulose

Olivera Šauperl (Author), Mirjana Kostić (Author), Jovana Milanovic (Author), Lidija Fras Zemljič (Author)

Abstract

The aim of this study was to analyze binding of chitosan and chitosan nanoparticles onto cellulose via oxidized cellulose. The ability of chitosan and chitosan nanoparticles to be adsorbed onto surfaces was determined by the use of the XPS spectroscopy which provided information about chemical composition of the fiber surface. On the other hand, the gravimetric method was also used by which the amount of chitosan and chitosan nanoparticles bounded onto surface was calculated based on the difference in masses before and after functionalization. The most important was to study the influence of aldehyde groups on the stability of chitosan binding onto cellulose. Thus, desorption of chitosan/chitosan nanoparticles from the fiber surfaces was evaluated by the presence of total nitrogen (TN) in desorption bath as well as by polyelectrolyte titrations. Together with these two methods, desorption was evaluated also by gravimetric method, where the extent of desorption was evaluated on the basis of the differences in the masses of fibers before and after desorption. It is concluded that the chitosan and chitosan nanoparticles are more efficiently bounded onto oxidized cellulose in comparison with the non-oxidized (reference) ones. Despite the binding of the positively-charged amino groups with the negative groups of cellulose and consequently smaller amount of available/residual protonated amino groups that are responsible for bioactivity, such functionalized fibers are still specifically antimicrobial.

Keywords

celuloza;oksidirana celuloza;oksidacija;hitozan;hitozanski nanodelci;FTIR spektroskopija;XPS;protimikrobna funkcionalizacija;cellulose;oxidized cellulose;oxidation;chitosan;chitosan nanoparticles;FTIR;antimicrobial functionalization;

Data

Language:	English
Year of publishing:	2015
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	677:544
COBISS:	18728214
ISSN:	1558-9250
Views:	832
Downloads:	433
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	celuloza;oksidirana celuloza;oksidacija;hitozan;hitozanski nanodelci;FTIR spektroskopija;XPS;protimikrobna funkcionalizacija;
URN:	URN:SI:UM:
Type (COBISS):	Scientific work
Pages:	str. 70-77
Volume:	ǂVol. ǂ10
Issue:	ǂiss. ǂ2
Chronology:	2015
ID:	9142072