20.500.12556/DKUM-59276 Chemical binding of chitosan and chitosan nanoparticles onto oxidized cellulose 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. cellulose oxidized cellulose oxidation chitosan chitosan nanoparticles FTIR XPS antimicrobial functionalization celuloza oksidirana celuloza oksidacija hitozan hitozanski nanodelci FTIR spektroskopija XPS protimikrobna funkcionalizacija true false true Angleški jezik Slovenski jezik Znanstveno delo 2016-05-11 03:53:59 2017-08-02 11:47:22 2022-06-20 03:06:13 2019-07-11 11:08:31 2015 0 0 str. 70-77 št. 2 Letn. 10 2015 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1558-9250 677:544 15831318 18728214 1558-9250 URN:SI:UM:DK:OPOTMWRX Journal_of_Engineered_Fibers_and_Fabrics_2015_Sauperl_et_al._Chemical_Binding_of_Chitosan_and_Chitosan_Nanoparticles_onto_Oxidized_Cellu.pdf Journal_of_Engineered_Fibers_and_Fabrics_2015_Sauperl_et_al._Chemical_Binding_of_Chitosan_and_Chitosan_Nanoparticles_onto_Oxidized_Cellu.pdf 1 2FF0CC440BF29687EE426E134ABEDFF9 7a57cec714298b1f10752374043bc93ce5efc0e24d28cdfc22ac62a47f260e90 76620934-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=114701 http://www.jeffjournal.org/papers/Volume10/V10I2(8)%20O.%20Sauperl.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=91345 Fakulteta za strojništvo 0 0 0