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- W3169120191 endingPage "104623" @default.
- W3169120191 startingPage "104623" @default.
- W3169120191 abstract "Copolymer gels prepared by polymerization of thermo-responsive and anionic monomers demonstrate strong sensitivity to several triggers such as temperature, pH and ionic strength of aqueous solutions. For biomedical applications of these materials (as on–off switches in controlled drug delivery and release), fine tuning of their volume phase transition temperature (VPTT) and a sharp decay in degree of swelling upon transition from the swollen to the collapsed state are needed. These requirements are fulfilled under swelling of copolymer gels and microgels in water under acidic conditions, but are violated when tests are conducted under alkaline conditions or in aqueous solutions of salts with physiological salinity. A model is developed for equilibrium swelling of multi-stimuli-responsive copolymer gels in aqueous solutions with arbitrary pH and molar fractions of a monovalent salt. Unlike conventional approaches, the model accounts for secondary interactions between chains (hydrogen bonding) to describe the kinetics of aggregation of hydrophobic segments above VPTT. Material constants are determined by fitting experimental swelling diagrams on poly(N-isopropylacrylamide–co–sodium acrylate) gels with various molar fractions of ionic monomers. The effects of temperature, pH and molar fraction of salt on the equilibrium degree of swelling below and above VPTT are studied numerically." @default.
- W3169120191 created "2021-06-22" @default.
- W3169120191 creator A5005826042 @default.
- W3169120191 creator A5019640312 @default.
- W3169120191 date "2021-09-01" @default.
- W3169120191 modified "2023-10-12" @default.
- W3169120191 title "Equilibrium swelling of multi-stimuli-responsive copolymer gels" @default.
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- W3169120191 doi "https://doi.org/10.1016/j.jmbbm.2021.104623" @default.
- W3169120191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34098283" @default.
- W3169120191 hasPublicationYear "2021" @default.
- W3169120191 type Work @default.