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Enhancement of antibacterial and wettability performances of polyvinyl alcohol/chitosan film using non-thermal atmospheric pressure plasma

Authors
 Ramhari Paneru  ;  Se Hoon Ki  ;  Pradeep Lamichhane  ;  Linh N. Nguyen  ;  Bishwa Chandra Adhikari  ;  Il Jun Jeong  ;  Sohail Mumtaz  ;  Jinsung Choi  ;  Jae Sung Kwon  ;  Eun Ha Choi 
Citation
 APPLIED SURFACE SCIENCE, Vol.532(1) : 147339, 2020-12 
Journal Title
 APPLIED SURFACE SCIENCE 
ISSN
 0169-4332 
Issue Date
2020-12
Keywords
Polyvinyl alcohol ; Chitosan ; Dielectric barrier discharge ; Wettability ; Antibacterial activity
Abstract
The surface of polyvinyl alcohol/chitosan (PVA/Cs) films was modified utilizing facing-dielectric barrier discharge argon plasma driven by alternating current in an atmospheric pressure condition. The surface properties of the films were analyzed using the scanning electron microscope, water contact angle, X-ray photoelectron spectroscopy, and atomic force microscope. The surface energy and corresponding components were evaluated by the Owens–Wendt technique. Additionally, the antibacterial properties of samples were studied using the plate counting method against Escherichia coli and Staphylococcus aureus. After the plasma treatment, a new oxygen-containing hydrophilic group was introduced, and the surface roughness of the film significantly increased. The wettability of PVA/Cs films improved owing to a new polar Osingle bondCdouble bondO functional group and increased surface roughness. With increasing plasma treatment time, up to 10 min, more significant antibacterial efficiency of the films against E. coli (98%) and S. aureus (96%) was observed. The results demonstrate that the increased surface wettability of PVA/Cs films enhanced their antibacterial efficiency against the two microscopic organisms. Additionally, the plasma treatment enabled the strong hydrogen bonds formed between the two polymer chains of the film, resulting in slightly increased of elastic and plastic behaviors.
Full Text
https://www.sciencedirect.com/science/article/pii/S0169433220320961
DOI
10.1016/j.apsusc.2020.147339
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Kwon, Jae-Sung(권재성) ORCID logo https://orcid.org/0000-0001-9803-7730
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/180647
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