RT info:eu-repo/semantics/article
T1 Optical, morphological and photocatalytic properties of biobased tractable films of chitosan/donor-acceptor polymer blends
A1 Jessop, I.
A1 Albornoz, J.
A1 Ramírez, O.
A1 Durán, B.
A1 Molero, L.
A1 Bonardd, S.
A1 Kortaberria, G.
A1 Diaz Diaz, David
A1 Leiva, A.
A1 Saldías, César
K1 Biobased tractable films
K1 Photoactivity
K1 Photodegradation
K1 Fotoactividad
K1 Fotodegradación
AB Biobased tractable films consisting of blends of chitosan (CS) with polymer bearing carbazole derivatives aspendant groups and fluorene-thiophene as donor-acceptor units (referred to as DA) were prepared, and theiroptical, morphological and photocatalytic properties were studied. DA was dissolved in tetrahydrofuran (THF)and mixed with an acidified aqueous solution containing chitosan to obtain chitosan/DA (CS/DA) films bysolution casting. The fabricated biobased films were characterized using spectroscopic techniques (FT-IR andUV–vis), thermogravimetry, mechanical assays, contact angle analysis, and atomic force microscopy (AFM). Theeffects of varying DA compositions and the results of exposure to visible-light irradiation of the films were alsoanalyzed. The results indicated the existence of interactions between chitosan and DA and a potentially profitablelight-driven response of these biobased films. This behavior was reflected in the optical, topographical,and contact angle properties of the films, which exhibited different characteristics before and after visible-lightexposure. Finally, the photocatalytic performance of the biobased films was tested via the decomposition ofmethyl orange (MO), as a reaction model system. Our results revealed a significant photocatalytic activity(according to biobased film composition, approximately 64 % and 87 % of methyl orange were degraded undercontinuous visible-light irradiation for 120 min) of the films which is attributed to the combined presence andsynergetic effects of the film-forming ability of chitosan and the photoproperties of DA.
PB Elsevier
YR 2020
FD 2020
LK http://riull.ull.es/xmlui/handle/915/21332
UL http://riull.ull.es/xmlui/handle/915/21332
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 28-nov-2024