Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/58785

TitleBioinspired baroplastic glycosaminoglycan sealants for soft tissues
Author(s)Costa, Rui R.
Costa, Diana Pereira Soares
Reis, R. L.
Pashkuleva, I.
KeywordsBioadhesives
Biomimetics
Glycosaminoglycans
Polyelectrolyte Complexes
Skin
Issue date2019
PublisherElsevier
JournalActa Biomaterialia
CitationCosta R. R., Soares da Costa D., Reis R. L., Pashkuleva I. Bioinspired baroplastic glycosaminoglycan sealants for soft tissues, Acta Biomaterialia, pp. in press, doi:10.1016/j.actbio.2019.01.040, 2019
Abstract(s)We describe biomimetic adhesives inspired by the marine glues fabricated by the sandcastle worm. The formation of stable polyelectrolyte complexes between poly-L-lysine (PLL) and glycosaminoglycans (GAGs) with different sulfation degree â heparin (HEP), chondroitin sulfate (CS) and hyaluronic acid (HA) â is optimized by zeta-potential titrations. These PLL/GAG complexes are transformed into compact polyelectrolyte complexes (coPECs) with controlled water contents and densities via baroplastic processing. Rotational shear tests demonstrate that coPECs containing sulfated GAGs (HEP or CS) have solid-like properties, whereas HA-based complexes form highly hydrated viscous-like networks. The adhesiveness of the generated coPECs (normalized lap shear strength) is tested in dry and wet states using polystyrene and rabbit skin, respectively. In dry state, the adhesives exhibit lap shear strengths in the order of hundreds of kPa, with coPLL/HEP and coPLL/CS being about 1.5 times stronger than coPLL/HA. In wet state, all coPECs seal rabbit skin and recover over 60% of the elongation capacity of intact skin with coPLL/HA providing the sturdiest adhesion (â ¼ 85% elongation recovery). We demonstrate that this is due to the higher water fraction that improves the bonding between the wet specimens, showcasing the potential superior mechanical recovery on injured tissues.
TypeArticle
URIhttp://hdl.handle.net/1822/58785
DOI10.1016/j.actbio.2019.01.040
ISSN1742-7061
Publisher versionhttps://reader.elsevier.com/reader/sd/pii/S1742706119300601?token=B0FDCA54B6C9DFB031EB5B38A96DD3BF78F900FBCCC9B30C245AFC3B09377BF8FEC6DC6EF628ABC4FDA8CE7471A0A65C
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals

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