Adaptive control in lubrication, adhesion, and hemostasis by Chitosan-Catechol-pNIPAM.
Biomater Sci
; 7(9): 3599-3608, 2019 Aug 20.
Article
em En
| MEDLINE
| ID: mdl-31339146
Bio-inspired wet adhesives attract considerable attention in the biomedical field. However, achieving reversible and controllable wet adhesion still remains a challenging issue. In this study, we report a new thermo-responsive polysaccharide wet adhesive conjugate named Chitosan-Catechol-poly(N-isopropyl acrylamide) (Chitosan-Catechol-pNIPAM), where catechol, the wet adhesive moiety, and pNIPAM, the thermal responsive group, are chemically tethered to a chitosan backbone. The as-synthesized Chitosan-Catechol-pNIPAM presents a reversible sol-gel transition behavior when the temperature is cycled below and above the lower critical solution temperature (LCST, 35 °C), along with dynamic switching between lubrication and wet adhesion on various materials. Based on these excellent features, Chitosan-Catechol-pNIPAM can realize controllable attachment/detachment behavior over the skin through heating/cooling processes. Due to its good biocompatibility, the Chitosan-Catechol-pNIPAM coated syringe needles exhibit instant hemostasis after removing the needles from the punctured sites of mouse veins. Overall, the as-synthesized Chitosan-Catechol-pNIPAM is expected to be used as a new intelligent adhesive in various biomedical settings.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Adesivos Teciduais
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Materiais Biocompatíveis
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Resinas Acrílicas
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Catecóis
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Quitosana
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Hemostasia
Limite:
Animals
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article