Wet-spun alginate/chitosan whiskers nanocomposite fibers: Preparation, characterization and release characteristic of the whiskers

Chitosan whiskers from shrimp shells incorporated into dimethacrylate-based dental resin sealant

“…A previous study of alginate/chitosan whiskers nanocomposite yarn showed rapidly release of whiskers within the first 2 h with a very gradual increase to the maximum value 30 h after immersion 14) . The present study on chitosan whiskers followed the same procedure as Watthanapanit et al 14) and selected the 12-h test for initial antimicrobial effect. It is critical that a study on whiskers release be conducted regarding the lasting effects on antimicrobial activity by chitosan resin sealant.…”

“…The antimicrobial effect of whiskers in the sealant may result from direct contact between the bacteria and chitosan whiskers present or released from the resin sealant surface 14) . A TEM image of 2% chitosan by wt.…”

“…Chitosan supplementation in dental products such as chitosan chewing gum 12) and chitosan conjugated chlorhexidine mouthwash 13) have shown satisfactory results in oral bacteria adhesion and inhibition experiments. A previous study on whisker-form chitosan, a small fibrous structure, in alginate-chitosan yarn indicated antibacterial activity and improved physical properties 14) . The purpose of this study was to evaluate the antimicrobial effect of nano-sized chitosan whiskers impregnated into resin sealant against Streptococcus mutans.…”

“…The final product was diluted and dialyzed against distilled water until the pH reached 6.3. The suspension was kept at 4°C and ultrasonicated for 5 min prior to using to ensure homogeneity 14) .…”

Recent Trends in Alginate, Chitosan and Alginate-Chitosan Antimicrobial Systems

“…Using alginate-chitosan mixtures can be obtained fi bers with advanced useful properties, compared to individual polymers. Wet spinning technique [69][70][71][72][73][74][75] is the most common method for manufacturing these fi bers. Using this method, it can be obtained fi bers consisting entirely of alginate-chitosan mixture [70,75], alginate coated with chitosan [69,[71][72][73] (Figure 5) or vice versa -chitosan coated with alginate [74] (Figure 6).…”