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Rapid preparation and antimicrobial activity of polyurea coatings with RE-Doped nano-ZnO.
Li, Yuanzhe; Liu, Yang; Yao, Bingqing; Narasimalu, Srikanth; Dong, ZhiLi.
  • Li Y; School of Materials Science & Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Liu Y; School of Materials Science & Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Yao B; School of Mechanical Engineering & Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan, 411105, China.
  • Narasimalu S; School of Materials Science & Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Dong Z; Energy Research Institute @ NTU (ERI@N), CleanTech One, Singapore, 637141, Singapore.
Microb Biotechnol ; 15(2): 548-560, 2022 02.
Article in English | MEDLINE | ID: covidwho-1480082
ABSTRACT
The recent COVID-19 virus has led to a rising interest in antimicrobial and antiviral coatings for frequently touched surfaces in public and healthcare settings. Such coatings may have the ability to kill a variety of microorganisms and bio-structures and reduce the risk of virus transmission. This paper proposes an extremely rapid method to introduce rare-earth doping nano-ZnO in polyamines for the preparation of the anti-microbial polyurea coatings. The nano-ZnO is prepared by wet chemical method, and the RE-doped nano-ZnO was obtained by mixing nano ZnO and RE-dopants with an appropriate amount of nitric acid. This rapidly fabricated polyurea coating can effectively reduce bacteria from enriching on the surface. Comparing with pure nano-ZnO group, all the polyurea coatings with four different rare-earth elements (La, Ce, Pr and Gd) doped nano-ZnO. The La-doped nano-ZnO formula group indicates the highest bactericidal rate over 85% to Escherichia coli (E. coli) and Pseudomonas aeruginosa (Pseudomonas). Followed by Ce/ZnO, the bactericidal rate may still remain as high as 83% at room temperature after 25-min UV-exposure. It is believed that the RE-doping process may greatly improve the photocatalytic response to UV light as well as environmental temperature due to its thermal catalytic enhancement. Through the surface characterizations and bioassays, the coatings have a durably high bactericidal rate even after repeated usage. As polyurea coating itself has high mechanical strength and adhesive force with most substrate materials without peel-off found, this rapid preparation method will also provide good prospects in practical applications.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Zinc Oxide / COVID-19 / Anti-Infective Agents Type of study: Prognostic study Limits: Humans Language: English Journal: Microb Biotechnol Year: 2022 Document Type: Article Affiliation country: 1751-7915.13891

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Zinc Oxide / COVID-19 / Anti-Infective Agents Type of study: Prognostic study Limits: Humans Language: English Journal: Microb Biotechnol Year: 2022 Document Type: Article Affiliation country: 1751-7915.13891