Double noncovalent network chitosan/hyperbranched polyethylenimine/Fe³⁺ films with high toughness and good antibacterial activity

Abstract

Double noncovalent network chitosan/hyperbranched polyethylenimine/Fe3+ films.

One-pot synthesis of iron oxide - Gamma irradiated chitosan modified SBA-15 mesoporous silica for effective methylene blue dye removal

“…A prominent signal at 103.5 eV, which is typical of SiO 2 -based materials, can be seen in the Si2p spectrum. Three elements in the C1s spectrum have chemical shifts that correspond to the following groups: aliphatic (C–C, C–H) groups (284.9 eV (0.1)), CH and C N groups (286.5 eV (±0.1)), and C O groups (288.1 eV (±0.1)) [ 62 , 63 ]. The amino groups that were engaged in hydrogen bonds (NH 2 –O) were assigned the binding energies of the N 1 s band at 399.5 eV [ 64 ].…”

Biodegradability Study of Modified Chitosan Films with Cinnamic Acid and Ellagic Acid in Soil

“…The incorporation of various additives, such as essential oils, phenolic acids, and plant extracts, into chitosan has been found to significantly enhance its antibacterial and antioxidant properties. This emerging practice of utilizing coating to extend the shelf life of products is currently gaining momentum [ 34 , 35 , 36 , 37 ]. In our study, ellagic acid and cinnamic acid were introduced into the chitosan film at concentrations of 0.2 and 0.4%.…”

Double-Network Chitosan-Based Hydrogels with Improved Mechanical, Conductive, Antimicrobial, and Antibiofouling Properties

“…Double noncovalent network chitosan/hyperbranched polyethylenimine/Fe 3+ films exhibited distinct antimicrobial activity against E. coli and against S. aureus . The inhibition zone diameters varied between 12.38 and 13.07 mm [ 183 ]. In conclusion, DN hydrogels are able to inhibit protein fouling and biofilm formation of both Gram + as well as Gram − bacteria.…”

“…Their impressive antifreezing abilities, ionic and electric conductivity, sensitive sensing, and excellent UV resistance, in addition to their good flexibility, point to their potential for use in harsh environments. Recently, a noncovalent crosslinking technique was used to create novel chitosan/hyperbranched polyethyleneimine and chitosan/hyperbranched polyethyleneimine/Fe 3+ films [ 183 ]. After a small amount of iron ions was added, the film’s tensile strength increased while the strain reduced.…”