Abstract Bionanocomposites represent an emerging group of nanostructured hybrid materials. They are formed by the combination natural polymers and inorganic solids show at least one dimension on nanometer scale. Similar to conventional nanocomposites, which involve synthetic polymers, these biohybrid materials also exhibit improved structural functional properties great interest for different applications. The inherent biopolymers, that is, biocompatibility biodegradability, open new...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(ethylene oxide)-silicate intercalation materialsPilar Aranda and Eduardo Ruiz-HitzkyCite this: Chem. Mater. 1992, 4, 6, 1395–1403Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 November 1992https://pubs.acs.org/doi/10.1021/cm00024a048https://doi.org/10.1021/cm00024a048research-articleACS PublicationsRequest reuse permissionsArticle Views1551Altmetric-Citations483LEARN ABOUT THESE...

Nanostructured hybrids derived from clays are materials of increasing interest based on both structural characteristics and functional applications, including environmental biomedical uses. This review introduces some recent examples nanostructured clay derivatives (organoclays) useful as adsorbents or photocatalysts for applications such the removal pollutants development environmentally oriented pesticide formulations. The second group considered here related to so-called bio-nanohybrids,...

The present work introduces new hybrid materials based on the combination of layered double hydroxides (LDH) and two biopolymers (a protein a polysaccharide) to produce LDH–biopolymer nanocomposites, able act as effective drug delivery systems (DDS) in comparison LDH or alone. Ibuprofen (IBU) has been chosen model drug, being intercalated Mg–Al matrix. resulting is used prepare bionanocomposite by association with biopolymers: (i) zein, highly hydrophobic protein, (ii) alginate,...

A new family of functional hybrid nanocomposites based on the intercalation naturally occurring anionic biopolymers including alginic acid, pectin, κ-carrageenan, ι-carrageenan, and xanthan gum in [Zn2Al(OH)6]Cl·nH2O layered double hydroxide (LDH), have been synthesized. The "coprecipitation" or "co-organized assembly" method has successfully employed for such polysaccharides within [Zn2Al] LDH. However, "reconstruction" procedure from calcined LDH presence only resulted a partial organic...

Bio-nanocomposites are an emerging group of hybrid materials derived from natural polymers and inorganic solids interacting at the nanometric scale. These nanostructured organic–inorganic could be designed prepared using a wide type biopolymers also with different compositions topologies. Among these last solids, special attention is devoted to layered that show ability intercalate giving hybrids functional properties. This novel research topic envisages future development biomimetic provide...

Composite ionic conductors based on homoionic montmorillonites (2:1 charged layers silicates containing metal ions in their interlayer space) cinteracted with poly(ethylene oxide) exhibit enhanced condcutivity between silicate (see figure). The presence of tunnels the intercalated polymer–salt complex is thought to facilitate intracrystalline ion mobility. magnified image

We report in this paper the synthesis and characterization of a new class biopolymer−clay nanocomposites based assembling chitosan to sepiolite, which is natural magnesium silicate showing microfibrous texture. CHN ICP/AES chemical analyses, XRD, FTIR spectroscopy, 13C solid-state NMR, LT-SEM, thermal analysis have been employed resulting nanocomposites. The adsorption isotherm on sepiolite acidic medium reveals significant coverage biopolymer at high equilibrium concentration values...

Abstract Recent results demonstrating the possibility of preparing graphene‐like materials from natural resources such as sucrose (table sugar) and gelatin assembled to silica‐based porous solids without a requirement for reducing agents are discussed. The resulting show interesting characteristics, simultaneous conducting behavior afforded by sp 2 carbon sheets, together with chemical reactivity structural features, provided silicate backbone, which interest diverse high‐performance...

Microfibrous TiO2−sepiolite and TiO2/SiO2−sepiolite nanocomposites were prepared following a colloidal route based on the controlled hydrolysis of alkoxides in presence cetyltrimethylammonium−sepiolite gel. In this way, titanium(IV) isopropoxide tetramethoxysilane used as titania silica precursors, respectively, being incorporated within organophilic layer developed surface silicate microfibers further hydrolyzed region. The precursor gives highly viscous systems leading to spontaneous...

A new type of hybrid biomaterials based on the clay minerals montmorillonite and sepiolite as well phosphatidylcholine, acting environment-friendly biomodifier, was prepared. The biohybrids were characterized by sampling adsorption isotherms in different organic solvents. results suggest bilayer formation both external surface intracrystalline space montmorillonite. obtained supported lipid membranes further investigated X-ray diffraction, multinuclear solid state NMR, Fourier transformed IR...

An approach to functionalize graphene‐based materials has been developed by assembling graphene nanoplatelets (GNP) with clay minerals. Under convenient sonomechanical treatment, clay–GNP mixtures may produce very stable water dispersions in particular using sepiolite fibrous clay. While the absence of a rapid decantation GNP is observed, presence resulting remain during months without syneresis effects. Rigid but flexible self‐supported films are easily obtained filtering these dispersions....

The present work refers to clay-graphene nanomaterials prepared by a green way using caramel from sucrose and two types of natural clays (montmorillonite sepiolite) as precursors, with the aim evaluating their potential use in hydrogen storage. impregnation clay substrates aqueous media, followed thermal treatment absence oxygen these clay-caramel intermediates gives rise graphene-like materials, which remain strongly bound silicate support. nature resulting materials was characterized...

Abstract Functional heterofibrous hybrid materials are prepared in an integrative approach from aqueous dispersions of nanofibrillated cellulose and sepiolite by applying high shear homogenization ultrasound irradiation. Both types nanofibers remain physically cross‐linked forming homogeneous very stable high‐viscosity gels that can be shaped as films considered “hybrid nanopapers” well. The presence modifies the surface roughness resulting casting process, which rendered hydrophobic,...