Organizing co mmittee

 
 

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Poster presentation 
207 
FABRICATION OF CARBOXYMETHYLCELLULOSE 
ELECTROSPUN/POLYVINYLALCOHOL NANOFIBERS 
FUNCTIONALIZED WITH SILVER NANOPARTICLES 
K.E. Yunusov, A.A. Ataxanov, A.A. Sarimsakov, S.Sh. Rashidova 
Institute of Polymer Chemistry and Physics, Uzbekistan Academy of Sciences, 
Uzbekistan, 100128, Tashkent, str. Abdulla Kadyri. 7
“b”
. 
e-mail: [e-mail]
 
Silver nanoparticles (AgNPs) have been applied in antimicrobial, antibacterial 
medical textiles, wound dressings, antimicrobial catheters, medical masks, tissue 
engineering scaffolds, and water purification due to their strong bacteriostatic and 
bactericidal effects as well as broad-spectrum antimicrobial activities. AgNPs can be 
obtained via various approaches such as chemical reduction of silver salt in solution, 
irradiation, and biological reduction. 
In the first stage of the investigation, the formation of AgNPs in 1 wt.% of sodium-
carboxymethylcellulose with DS 0.85 and DP 400 (Na-CMC) and polyvinylalcohol 
(PVA) solutions was carried out by photochemical reduction of silver ions (Ag
+
). It has 
been established that adding PVA and Ag
+
to a Na-CMC solution increases the 
viscosity of the solution owing to the decreased solubility of Ag
+
CMC
−
complexes 
generated due to the formation of coordination bonds
between the carboxylate groups (-
COO
−
) of Na-CMC macromolecules and Ag
+
. Then, the reaction sequence is according 
to the Mott-Gurney mechanism. 
It is observed that the Na-CMC nanofibers are smooth with an average diameter of 
103±30 nm. After treatment with AgNO
3
solution as well as UV radiation, many 
AgNPs were deposited on the surface and in the network of the nanofibers, indicating 
successful reduction and restoration of Ag
+
ions into metallic Ag NPs (Fig. 1b). 
However, the average diameter of the CMC/Ag NPs with sizes approximately 89 ± 23 
nm was smaller than the CMC fibers, probably owing to the known ability of CMC to 
dissolve freely in the water.
In conclusion, the solutions of different concentrations were obtained, and studied 
physicochemical 
properties 
of 
the 
composition 
solution 
of 
sodium-
carboxymethylcellulose/polyvinyl alcohol/silver nanoparticles for obtaining nanofibers 
by electrospinning. Nanofibers were obtained by electrospinning from sodium-
carboxymethylcellulose/polyvinyl alcohol/silver nanoparticles solutions, and their 
morphological properties and dimensions were studied using a scanning electron and 
atomic force microscope. The result confirmed that from the solution it can be obtained 
the formation of nanofibers with a size in diameter of 50-160 nm.
The obtained membranes on the base nanofiber could be used as air antimicrobial 
filtration material. 
This work was supported by fundamental project FZ-4721055613 “Fundamental 
aspects of the formation of nanofibers based on macromolecular systems: conditions, 
structure formation, properties” for the years 2022-2026 by the Ministry of Innovative 
Development of the Republic of Uzbekistan.