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- W3141848610 abstract "Hydrogels have established their utility in the field of biomedical science and technology including drug delivery and tissue engineering, among other applications. Crosslinking density critically affects the resultantphysical property of the hydrogels. Here, we have successfully synthesized carboxymethylchitosan (CMC) andoxidized alginate (AA) from chitosan and sodium alginate, respectively. CMC and AA were used to fabricateCMC-AA-single network (CMC-AA-SNH) and CMC-AA-double network (CMC-AA-DNH) hydrogels. Crosslinking of CMC-AA-SNH was done by dynamic covalent bonding, that is, imine bond formation, whereas CMC-AA-DNH was crosslinked via covalent imine bond and Ca2+ mediated ionic interactions. Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H NMR) studies were employed tocharacterize the components of the hydrogels. Effect of dual crosslinking over the single crosslinked hydrogelwas extensively analyzed by rheological studies. Scanning electron microscopy revealed that the CMC-AA-DNHwas more densely packed with interconnected structure than CMC-AA-SNH. Swelling study demonstrated thatthe degree of swelling of CMC-AA-DNH was significantly less than CMC-AA-SNH due to more crosslinking density. Compressive mechanical test of the hydrogels further indicated that CMC-AA-DNH exhibits fracture stress of 79.5 kPa. These results indicate how the physical and mechanical properties of a polymeric hydrogel system can be tuned through control of crosslinking, which have important implications for the use of these gels for biomedical applications." @default.
- W3141848610 created "2021-04-13" @default.
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- W3141848610 date "2020-01-01" @default.
- W3141848610 modified "2023-09-24" @default.
- W3141848610 title "Effect of dual crosslinking on physico-chemical properties of hydrogels prepared from chitosan and alginate" @default.
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