Synthesis and characterization of polysaccharide-based antimicrobial materials
Novel 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 immobiliza...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/51089 |
| _version_ | 1811696573367713792 |
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| author | Li, Peng |
| author2 | Chan Bee Eng, Mary |
| author_facet | Chan Bee Eng, Mary Li, Peng |
| author_sort | Li, Peng |
| collection | NTU |
| description | Novel 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. |
| first_indexed | 2024-10-01T07:41:31Z |
| format | Thesis |
| id | ntu-10356/51089 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:41:31Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/510892023-03-03T16:06:45Z Synthesis and characterization of polysaccharide-based antimicrobial materials Li, Peng Chan Bee Eng, Mary School of Chemical and Biomedical Engineering DRNTU::Engineering::Materials::Biomaterials DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture DRNTU::Science::Chemistry::Organic chemistry::Polymers Novel 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. Doctor of Philosophy (CBME-CBE) 2013-01-07T01:42:05Z 2013-01-07T01:42:05Z 2012 2012 Thesis Li, P. (2012). Synthesis and characterization of polysaccharide-based antimicrobial materials. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/51089 10.32657/10356/51089 en 202 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Biomaterials DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture DRNTU::Science::Chemistry::Organic chemistry::Polymers Li, Peng Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title | Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title_full | Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title_fullStr | Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title_full_unstemmed | Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title_short | Synthesis and characterization of polysaccharide-based antimicrobial materials |
| title_sort | synthesis and characterization of polysaccharide based antimicrobial materials |
| topic | DRNTU::Engineering::Materials::Biomaterials DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture DRNTU::Science::Chemistry::Organic chemistry::Polymers |
| url | https://hdl.handle.net/10356/51089 |
| work_keys_str_mv | AT lipeng synthesisandcharacterizationofpolysaccharidebasedantimicrobialmaterials |