Your browser doesn't support javascript.

Biblioteca Virtual en Salud

Brasil

Home > Búsqueda > ()
Imprimir Exportar

Formato de exportación:

Exportar

Email
Adicionar mas contactos
| |

Self-healable, tough and highly stretchable ionic nanocomposite physical hydrogels.

Zhong, Ming; Liu, Xiao-Ying; Shi, Fu-Kuan; Zhang, Li-Qin; Wang, Xi-Ping; Cheetham, Andrew G; Cui, Honggang; Xie, Xu-Ming.
Soft Matter; 11(21): 4235-41, 2015 Jun 07.
Artículo en Inglés | MEDLINE | ID: mdl-25892460
We present a facile strategy to synthesize self-healable tough and highly stretchable hydrogels. Our design rationale for the creation of ionic cross-linked hydrogels is to graft an acrylic acid monomer on the surface of vinyl hybrid silica nanoparticles (VSNPs) for the growth of poly(acrylic) acid (PAA), and the obtained VSNP-PAA nanobrush can be used as a gelator. Physical cross-linking through hydrogen bonding and ferric ion-mediated ionic interactions between PAA polymer chains of the gelators yielded ionic nanocomposite physical hydrogels with excellent and balanced mechanical properties (tensile strength 860 kPa, elongation at break ∼2300%), and the ability to self-repair (tensile strength ∼560 kPa, elongation at break ∼1800%). The toughness and stretchability arise from the reversible cross-linking interactions between the polymer chains that help dissipate energy through stress (deformation) triggered dynamic processes. These unique properties will enable greater application of these hydrogel materials, especially in tissue engineering.
Selo DaSilva