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A novel self-healing hydrogel based on derivatives of natural α-amino acids with potential applications as a strain sensor

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dc.abstract.enWe successfully synthesized a novel hydrogel based on derivatives of natural α-amino acids: ornithine and cystine. To make ornithine attachable to the polymer chain, the δ-amino group was modified with an acryloyl group and the main monomer was obtained. From cystine, the cross-linker N,N′-bisacryloylcystine was obtained. Then, by free radical polymerization of the monomers in the presence of Fe3+, the hydrogel was obtained. The presence of iron ions in the pre-gel solution accelerated the decomposition of a free radical initiator (ammonium persulfate) and allowed uniform distribution of complexed Fe3+ in the hydrogel to be obtained. The presence of free α-amino acid groups in the main monomer and then in the polymeric network of the gels enables this complexation. As a result, the obtained hydrogel benefits from the chemical and physical cross-links, disulfide bonds, and metal-ligand complex, respectively. The composition of the hydrogel was optimized to obtain improved mechanical properties and self-healing ability. Thereby we identified a hydrogel exhibiting fast and conclusive self-healing, which recovered approximately 99% (efficiency of self-healing based on fracture strain) of its original properties after 15 min. The conductivity and electrical response of the hydrogel were investigated. The results revealed a rapid electrical response to minor stretching of the hydrogel, allowing it to be used as a strain sensor. In addition, the presence of the disulfide bonds in the hydrogel structure enabled the hydrogel to degrade in a redox environment.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKarbarz, Marcin
dc.contributor.authorRomański, Jan
dc.contributor.authorJagleniec, Damian
dc.contributor.authorGharakhloo, Mosayeb
dc.date.accessioned2024-01-24T18:04:42Z
dc.date.available2024-01-24T18:04:42Z
dc.date.issued2022
dc.description.financeNie dotyczy
dc.description.number23
dc.description.volume10
dc.identifier.doi10.1039/D2TB00534D
dc.identifier.issn2050-7518
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101767
dc.identifier.weblinkhttp://pubs.rsc.org/en/content/articlepdf/2022/TB/D2TB00534D
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofJournal of Materials Chemistry B
dc.relation.pages4463-4472
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleA novel self-healing hydrogel based on derivatives of natural α-amino acids with potential applications as a strain sensor
dc.typeJournalArticle
dspace.entity.typePublication