Highly efficient antifogging/antimicrobial dual-functional chitosan based coating for optical devices

Basheer Mansoor; Shanshan Li; Wei Chen

doi:10.1016/j.carbpol.2022.119928

Highly efficient antifogging/antimicrobial dual-functional chitosan based coating for optical devices

Carbohydr Polym. 2022 Nov 15:296:119928. doi: 10.1016/j.carbpol.2022.119928. Epub 2022 Jul 29.

Authors

Basheer Mansoor¹, Shanshan Li², Wei Chen³

Affiliations

¹ National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China; Institutes of Physical Science and Information Technology, Anhui University, Hefei 230026, China.
² College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
³ National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: wc003@ustc.edu.cn.

PMID: 36087980
DOI: 10.1016/j.carbpol.2022.119928

Abstract

The coating is frequently adopted to modify the product surface without influencing the essential features of the pristine products. Recently, significant demand has existed for efficient anti-fogging/anti-microbial surfaces in various applications to inhibit microbial growth with high transparency in high-humidity environments, especially in pandemics such as COVID-19. The current study used dual-functional chitosan (Ch) polysaccharide coating with highly hydrophilic properties to be progressively incorporated onto the glass substrates using a simple one-pot technique. Utilizing hot/cold fogging tests and plate count method, the dual-functional Ch/SiO₂(3) layer possesses excellent antifogging performance and anti-microbial activity. The hydrogen bonds and electrostatic attractions formed between MSN and Ch result in a higher bound water ratio, as confirmed by the low field nuclear magnetic resonance (LF-NMR). Therefore, based on the chitosan/silica layer, 95 % is the minimum proportion of bound water necessary in the final layer structure to completely inhibit microbial and fogging activities.

Keywords: Anti-fogging/anti-microbial; Chitosan; Coating; Low field nuclear magnetic resonance (LF-NMR).

MeSH terms

Anti-Bacterial Agents / chemistry
Anti-Bacterial Agents / pharmacology
Anti-Infective Agents* / pharmacology
COVID-19*
Chitosan* / chemistry
Chitosan* / pharmacology
Humans
Optical Devices*
Silicon Dioxide
Water

Substances

Anti-Bacterial Agents
Anti-Infective Agents
Water
Silicon Dioxide
Chitosan