Organizing co mmittee

 
 

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Poster presentation 
213 
PHYSICOCHEMICAL CHARACTERISTICS OF CELLULOSE -
CONTAINING SILVER NANOPARTICLES FOR AIR 
FILTRATION 
K.E. Yunusov, A.A. Sarymsakov, M.M. Mirxolisov o`g`li, S.Sh. Rashidova 
Institute of Polymer Chemistry and Physics, Uzbekistan Academy of Sciences, 100128, 
str. A. Khadyri 7 
“b”
, Tashkent, Uzbekistan, 
e-mail: [e-mail] 
Silver nanoparticles (AgNPs) have an extremely large specific surface area, which 
increases when in contact with bacteria, viruses, and fungi. This significantly increases 
their bactericidal activity by decreasing the sizes of AgNPs and by increasing their 
surface area to volume ratio.
The aim of this investigation is to prepare and physicochemically characterize textile 
biomaterials obtained from cotton fiber containing AgNPs stabilized with sodium-
carboxymethylcellulose (Na-CMC). 
Cellulosic fibers of cotton fabric (c/f) and purified Na-CMC with a degree 
substitution (DS) 0.85 and degree polymerization (DP) 400 were used as polymer 
matrices to obtain textile biomaterials. An aqueous solution of AgNO
3 
was used to form 
AgNPs in Na-CMC solutions. To form stabilized AgNPs, 0.1–0.4 wt.% aqueous 
solutions of purified samples of Na-CMC were used. The investigation, of the formation 
of AgNPs in 0.2-0.4 wt.% solutions of Na-CMC with DS of 0.88 and DP of 600 was 
carried out by photochemical reduction of Ag
+
. The reaction sequence according to the 
Mott-Gurney mechanism is represented as follows: 
The AFM images showed that at low concentrations of Ag
+
, spherical polydisperse 
AgNPs with sizes of 2-8 nm were formed. With increasing Ag
+ 
concentration after 
photolysis, spherical monodisperse AgNPs with sizes of 5-35 nm were obtained. 
Based on the results, the following conditions were determined for the formation of 
homogeneous, spherical, and stable AgNPs with sizes of 5-35 nm: UV irradiation for 30 
minutes and solution concentrations of 0.2 wt.% Na-CMC and 0.0086 wt.% AgNO
3
. 
Investigations showed that spherical AgNPs with sizes of 5-35 nm were present in Na-
CMC, whereas 0.0086 wt. % AgNPs sized 2-30 nm formed in cotton fabric, exhibiting 
high bactericidal activity. Cellulose-contained biomaterials could be used as face masks 
for air filtration. 
 
This work was supported by project Uzbekistan-Belarus MRB-2021-548 (Creation of 
fibre containing materials modified with organic and polymer-inorganic coatings for 
various functional purposes) for the years 2022-2023 by the Ministry of Innovative 
Development of the Republic of Uzbekistan.