dc.contributor.authorLi, Peng
dc.date.accessioned2013-01-07T01:42:05Z
dc.date.accessioned2017-07-23T08:25:57Z
dc.date.available2013-01-07T01:42:05Z
dc.date.available2017-07-23T08:25:57Z
dc.date.copyright2012en_US
dc.date.issued2012
dc.identifier.citationLi, P. (2012). Synthesis and characterization of polysaccharide-based antimicrobial materials. Doctoral thesis, Nanyang Technological University, Singapore.
dc.identifier.urihttp://hdl.handle.net/10356/51089
dc.description.abstractNovel broad-spectrum antimicrobial materials were developed based on the natural polysaccharide chitosan. Firstly, a group of antimicrobial materials were synthesized by quaternization and alkylation of chitosan. An argon plasma-ultraviolet (UV) induced coating method for hydrogel surface immobilization was developed, which can be applied on diverse soft biomedical surfaces. A novel mechanism of these hydrogels based on “anion sponge” concept was proposed and proven. The optimized coating formulation and conditions show excellent antimicrobial potency. The in vitro and in vivo studies suggest this antimicrobial coating is biocompatible with mammalian cells. Secondly, a peptidopolysaccharide that mimics the bacterial peptidoglycan structure, which is a feature unique to bacterial membrane but absent in mammalian cells, was designed, synthesized and tested. By the ring-opening polymerization of N-carboxyanhydrides (NCA), a polysaccharide backbone was copolymerized with cationic polylysine, and the resulting optimized peptidopolysacchride shows high selectivity to bacteria over mammalian cell. Thirdly, a polysaccharide-nanomaterial hybrid was designed by combining quaternized chitosan and nanomaterial. The huge specific surface area of the nanomaterial enables high surface density of the cationic polymers, and the nanomaterial act as the delivery vehicle for the targeted anionic bacterial membrane, thus enhancing the antimicrobial properties. These novel polysaccharide-based antimicrobial materials have a promising prospect in further applications.en_US
dc.format.extent202 p.en_US
dc.language.isoenen_US
dc.subjectDRNTU::Engineering::Materials::Biomaterialsen_US
dc.subjectDRNTU::Engineering::Chemical engineering::Polymers and polymer manufactureen_US
dc.subjectDRNTU::Science::Chemistry::Organic chemistry::Polymersen_US
dc.titleSynthesis and characterization of polysaccharide-based antimicrobial materialsen_US
dc.typeThesis
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.supervisorChan Bee Eng, Maryen_US
dc.description.degreeDOCTOR OF PHILOSOPHY (CBME-CBE)en_US


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