Green synthesis of quaternized chitosan nanogel using emulsion-photopolymerization as redox-responsive drug carrier
2
Issued Date
2023-03-15
Resource Type
ISSN
01448617
Scopus ID
2-s2.0-85145218914
Pubmed ID
36641180
Journal Title
Carbohydrate Polymers
Volume
304
Rights Holder(s)
SCOPUS
Bibliographic Citation
Carbohydrate Polymers Vol.304 (2023)
Suggested Citation
Lekjinda K., Sunintaboon P. Green synthesis of quaternized chitosan nanogel using emulsion-photopolymerization as redox-responsive drug carrier. Carbohydrate Polymers Vol.304 (2023). doi:10.1016/j.carbpol.2022.120495 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/81743
Title
Green synthesis of quaternized chitosan nanogel using emulsion-photopolymerization as redox-responsive drug carrier
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
We report the green synthesis of trimethyl chitosan-functionalized poly(2-hydroxyethyl methacrylate) (PHEMA-TMC) nanogels via surfactant-free emulsion photopolymerization. TMC, a quaternized derivative of chitosan, was synthesized through methylation of chitosan, resulting in quaternary and tertiary amine groups as the main substitution products. TMC tertiary amine moiety and riboflavin (RF) acted as a redox photo-initiating system to generate free radicals for the polymerization under light irradiation. The effects of polymerization parameters such as irradiation time, concentrations of TMC and RF were investigated using MBA as crosslinker. Under the optimal condition of 1 % TMC, 4 % HEMA, 0.8 μM RF, 5 % MBA, and 4 h of polymerization time, the cationic PHEMA-TMC nanogel was synthesized with 76 % monomer conversion and an average diameter of about 106 nm. Moreover, the disulfide-crosslinked PHEMA-TMC nanogel was also synthesized using the disulfide dimethacrylate crosslinker, which exhibited a redox-induced degradation and release of encapsulated melatonin, potentially useful as a redox-responsive drug delivery carrier.