Chemical binding of chitosan and chitosan nanoparticles onto oxidized cellulose

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

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Angleški jezik
Leto izida:	2015
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	677:544
COBISS:	18728214
ISSN:	1558-9250
Št. ogledov:	832
Št. prenosov:	433
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	celuloza;oksidirana celuloza;oksidacija;hitozan;hitozanski nanodelci;FTIR spektroskopija;XPS;protimikrobna funkcionalizacija;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Znanstveno delo
Strani:	str. 70-77
Letnik:	ǂVol. ǂ10
Zvezek:	ǂiss. ǂ2
Čas izdaje:	2015
ID:	9142072