Ultralightweight and Flexible Silylated Nanocellulose Sponges for the Selective Removal of Oil from Water
SÈBE, Gilles
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Leer más >
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
SÈBE, Gilles
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
< Leer menos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Idioma
en
Article de revue
Este ítem está publicado en
Chemistry of Materials. 2014, vol. 26, n° 8, p. 2659-2668
American Chemical Society
Resumen en inglés
In this work, we report the facile synthesis of hydrophobic, flexible, and ultralightweight (rho(sponge) <= 17.3 mg/cm(3)) nanocellulose sponges using a novel and efficient silylation process in water. These functional ...Leer más >
In this work, we report the facile synthesis of hydrophobic, flexible, and ultralightweight (rho(sponge) <= 17.3 mg/cm(3)) nanocellulose sponges using a novel and efficient silylation process in water. These functional materials with high porosity (>= 99%) are easily engineered by freeze-drying water suspensions of nanofibrillated cellulose (NFC), a natural nanomaterial isolated from renewable resources, in the presence of methyltrimethoxysilane sols of various concentrations. Microscopic and solid state nuclear magnetic resonance analyses reveal that the sponges are composed of a three-dimensional cellulosic network of thin sheets and nanofilaments, covered by polysiloxanes. Compared with conventional inorganic porous materials, the silylated NFC sponges display an unprecedented flexibility with a maximal shape recovery corresponding to 96% of the original thickness after 50% compression strain. The sponges also combine both hydrophobic and oleophilic properties and prove to be very efficient in removing dodecane spills from a water surface with an excellent selectivity and recyclability. Finally, the sponges can collect a wide range of organic solvents and oils with absorption capacities up to 100 times their own weight, depending on the density of the liquids. This versatile functionalization method opens up new opportunities for the design of novel advanced functional biomaterials with controlled properties.< Leer menos
Palabras clave en inglés
ABSORPTION
SURFACE
SORBENT
CELLULOSE I NANOFIBERS
SPILL CLEANUP
NANOFIBRILLATED CELLULOSE
MICROFIBRILLATED CELLULOSE
ORGANIC-SOLVENTS
CARBON NANOTUBE
AEROGELS
Orígen
Importado de HalCentros de investigación