Redox-activity of polydopamine for ultrafast preparation of self-healing and adhesive hydrogels.
Journal
Colloids and surfaces. B, Biointerfaces
ISSN: 1873-4367
Titre abrégé: Colloids Surf B Biointerfaces
Pays: Netherlands
ID NLM: 9315133
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
received:
12
02
2022
revised:
16
03
2022
accepted:
17
03
2022
pubmed:
28
3
2022
medline:
12
5
2022
entrez:
27
3
2022
Statut:
ppublish
Résumé
The high adhesive property of polydopamine (PDA) has spurred various hydrogels for biological and medical applications. Herein, a dual-catalytic redox system was constructed by using the inner dynamic redox-activity of PDA and free radical initiator ammonium persulfate (APS) to initiate the polymerization of acrylic acid (AA) monomer to obtain Fe-PDA hydrogels within 2 h at room temperature. Fe-PDA NPs functions as both initiator to activate APS to generate free radicals and promotes the formation of the hydrogel and dynamic cross-linking mediator between the polymer chains. The tensile strength and ductility of the obtained hydrogels vary with the content of Fe-PDA NPs. Hydrogel with 0.15 wt% of Fe-PDA NPs has the highest tensile strength (~0.62 MPa) and hydrogel with 0.6 wt% of Fe-PDA NPs has the highest elongation, about ~650%. The introduction of PDA NPs imparts PAA hydrogel with reproducible adhesive properties and self-healing ability. The doped iron ion further endows hydrogel enhanced photothermal properties (up to 160 ℃ with 808 nm laser irradiation for 120 s) and conductivity.
Identifiants
pubmed: 35339902
pii: S0927-7765(22)00152-7
doi: 10.1016/j.colsurfb.2022.112469
pii:
doi:
Substances chimiques
Adhesives
0
Hydrogels
0
Indoles
0
Polymers
0
polydopamine
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
112469Informations de copyright
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