Antibacterial casein-based ZnO nanocomposite coatings
In a recently published study, casein-based ZnO nanocomposite were prepared via double in situ polymerisation, where y-(2,3-epoxypropoxy) propytrimethoxysilane (KH560) was used as silane coupling agent.
Morphology, structure and size distribution of the composite latexes were characterised by TEM, FTIR, DLS, TG. Meantime, water absorption and antibacterial properties of the as-prepared composite coatings were also investigated. The results indicated that the average size of casein-based ZnO nanocomposite particles was approximately 259 nm. When dosage of ZnO precursor was increased to 3%, water resistance of the composite film was maximised in that water absorption rate was reduced to 49.9%.
A good candidate for functional coatings
When dosage of KH560 was 3.5%, the E. coli inhibition zone of casein-based ZnO nanocomposite was expanded from 0 mm to 9.0 mm, suggesting obviously enhanced antibacterial performance than that prepared via single in situ method. The as-prepared composite is a good candidate for functional coatings in relative fields.
The study is published in: Progress in Organic Coatings Volume 134, September 2019, Pages 40-47.
