Publication: PMMA particles coated with chitosan-silver nanoparticles as a dual antibacterial modifier for natural rubber latex films
Issued Date
2019-02-01
Resource Type
ISSN
18734367
09277765
09277765
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2-s2.0-85057260028
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Mahidol University
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SCOPUS
Bibliographic Citation
Colloids and Surfaces B: Biointerfaces. Vol.174, (2019), 544-552
Suggested Citation
Teeraporn Suteewong, Jitrada Wongpreecha, Duangporn Polpanich, Kulachart Jangpatarapongsa, Chariya Kaewsaneha, Pramuan Tangboriboonrat PMMA particles coated with chitosan-silver nanoparticles as a dual antibacterial modifier for natural rubber latex films. Colloids and Surfaces B: Biointerfaces. Vol.174, (2019), 544-552. doi:10.1016/j.colsurfb.2018.11.037 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50277
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Title
PMMA particles coated with chitosan-silver nanoparticles as a dual antibacterial modifier for natural rubber latex films
Abstract
© 2018 Elsevier B.V. The antibacterial activity in sulphur prevulcanized natural rubber (SPNR) latex film was effectively improved by deposition of poly(methyl methacrylate) (PMMA) particles encircled with chitosan-coated silver nanoparticles (AgNPs-CS). With the focus on a green process, CS was selected as a safe reducing and stabilizing agent for the one-step synthesis of AgNPs-CS (38 nm, +40.4 mV) in an autoclave. The adsorption of small-sized AgNPs-CS directly onto rubber film did not provide an inhibitory effect on S. aureus. It also had a low antibacterial effect on E. coli. This is because of the particles becoming completely/partially submerged into the soft rubber matrix upon drying. Hence, the AgNPs-CS were fabricated as a shell surrounding a rigid PMMA core (496 nm, -30.9 mV). This was done using a heterocoagulation technique prior to coating on SPNR film. The presence of PMMA/AgNPs-CS on the surface of SPNR film effectively increased the surface roughness from ca. 44 to 150 nm. This substantially promoted the antibacterial activity against E. coli and S. aureus by way of contact killing and repelling mechanisms. The cytotoxicity on L-929 fibroblasts was also suppressed. This study would be, therefore, applicable to the development of antibacterial SPNR film with high surface roughness, low cytotoxicity. It could also be applied for other soft substrates.