1. The crosslinking of polysaccharides with polyamines and dextran-polyallylamine antibacterial hydrogels.
- Author
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O'Connor NA, Abugharbieh A, Yasmeen F, Buabeng E, Mathew S, Samaroo D, and Cheng HP
- Subjects
- Absorption, Physicochemical, Anti-Bacterial Agents chemical synthesis, Anti-Bacterial Agents chemistry, Dextrans chemical synthesis, Dextrans chemistry, Escherichia coli drug effects, Hydrogels chemical synthesis, Hydrogels chemistry, Microbial Sensitivity Tests, Polyamines chemical synthesis, Polyamines chemistry, Spectroscopy, Fourier Transform Infrared, Staphylococcus aureus drug effects, Anti-Bacterial Agents pharmacology, Cross-Linking Reagents pharmacology, Dextrans pharmacology, Hydrogels pharmacology, Polyamines pharmacology
- Abstract
A facile modular approach to rapidly prepare pH-responsive hydrogels by crosslinking polysaccharides with polyamines is demonstrated. Hydrogels are prepared by first reacting the less reactive polysaccharides with the cross-linker epichlorohydrin and completed by the addition of polyamines. The crosslinking of polysaccharides with polyamines provides a facile method for incorporating functionality into polysaccharide based hydrogels. This process is demonstrated with the polysaccharides dextran, pullulan and carboxymethyl cellulose and with the polyamines polyallylamine and polyethylene imine. The hydrogels were characterized by FTIR and swelling studies, which showed pH-dependent swelling due to the presence of the polyamine. The hydrogels can also be tailored by varying the mass ratio between the polysaccharide and polyamine. Absorption studies of organic analytes showed the polyamine content affecting the uptake of a charged substrate (methylene blue) and no effect on a neutral substrate (6-methyl coumarin). This synthetic method was also used to prepare hydrogels with antibacterial activity against E. coli and S. aureus by utilizing an amphiphilic polyallylamine., (Copyright © 2014 Elsevier B.V. All rights reserved.)
- Published
- 2015
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