Influence of Quaternary Ammonium Salt Functionalized Chitosan Additive as Sustainable Filler for High-Density Polyethylene Composites

Abstract

In this study, an antimicrobial packaging material was successfully developed with blends of high-density polyethylene (HDPE) and chitosan (CS) made by melt processing. In the different HDPE/CS composites, the CS content effect (up to 40%), and the addition of quaternary ammonium salt functionalized chitosan (CS-CTAB) as an additive were evaluated by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analyses (TG), tensile strength, scanning electron microscopy (SEM) and antimicrobial activity. When analyzing the effect of the additive in the different HDPE/CS composites, it was observed that the compositions with 10 and 20 %wt of chitosan showed better elongation values (~13% and 10%) as well as a higher decomposition temperature at 20% mass loss (T20) varying from (321–332 °C and 302–312 °C), respectively, in relation to the other compositions, regardless of the type of additive used, it acted as an antimicrobial agent, promoting inhibition of microbial growth against the strains gram-positive and gram-negative used in this work, making the different HDPE/CS composites suitable candidates for use in food packaging.

Fabrication of a Universal Composite Coating for Biliary Stents with Protein Antifouling and Antibacterial Synergies

“…Therefore, MPC based polymer is expected to be an optimal candidate for antiadhesion modification of biliary stents. Furthermore, the combination of effective antimicrobial agents such as antibiotics, antimicrobial peptides, quaternary ammonium salts, chitosan, metal ions/nanoparticles, etc., is a common way for biomedical materials to construct actively attacked antibacterial surfaces. However, the performance of some antibacterial agents may be limited combined with the special conditions and alkaline environment of the biliary tract.…”