Cooperative crystallization effect in the formation of sonochemically grafted active materials based on polysaccharides.

Cooperative crystallization effect in the formation of sonochemically grafted active materials based on polysaccharides. Colloids Surf B Biointerfaces. 2020 Mar 03;190:110931 Authors: Shebis Y, Kumar VB, Gedanken A, Poverenov E Abstract The current study explores the formation of active eco-friendly materials capable of preventing microbial contamination using in situ ultrasonic grafting of vanillin, curcumin and a curcumin-vanillin mixture on the surfaces of carboxymethylcellulose (CMC) and chitosan films. Spectroscopic, microscopic, physical and mechanical studies revealed that the films grafted with curcumin-vanillin mixture demonstrate improved mechanical properties and higher degree of order. The bioactivity of the prepared films was tested on food model, fresh-cut melons and films with a deposited curcumin-vanillin mixture showed superior antibacterial properties. For instance, this mixture-grafted on CMC films demonstrated a total inhibition of yeast/mold proliferation during 12 days. The HR-SEM studies of the mixture-grafted films revealed the presence of crystalline structures. Cooperative crystallization effect between the curcumin (the crystal maker) and the volatile vanillin is suggested to be responsible for the observed effects. According to our knowledge, this is the first usage of co-crystallization method in surface deposition. The results point out to a general strategy of combining a crystal maker agent with a vola...
Source: Colloids and Surfaces - Category: Biotechnology Authors: Tags: Colloids Surf B Biointerfaces Source Type: research