6533b838fe1ef96bd12a4892
RESEARCH PRODUCT
Selective functionalization of halloysite cavity by click reaction: structured filler for enhancing mechanical properties of bionanocomposite films
Renato NotoStefana MiliotoGiuseppe LazzaraSerena RielaGiuseppe CavallaroFrancesca ArcudiMarina Massarosubject
NanocompositeMaterials scienceHydroxypropyl celluloseNanotechnologySettore CHIM/06 - Chimica Organicaengineering.materialHalloysiteSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsNanomaterialsThermogravimetrychemistry.chemical_compoundGeneral EnergychemistryClick chemistryengineeringSurface modificationhalloysite biopolymers click-reactionPhysical and Theoretical ChemistryFourier transform infrared spectroscopySettore CHIM/02 - Chimica Fisicadescription
Selective modification of the inner surface of halloysite nanotubes (HNTs) by the cycloaddition of azides and alkynes (click reaction) was successfully achieved. Fourier transform infrared spectroscopy and thermogravimetry confirmed that the modification involved only the HNT cavity. Morphological investigations evidenced that the functionalized nanotubes formed microfibers and clusters in the micrometer range. By means of the casting method, these nanomaterials were dispersed into biopolymeric matrixes (chitosan and hydroxypropyl cellulose) with the aim of obtaining nanocomposite films with tunable properties from the physicochemical viewpoint. For comparison purposes, we also characterized composite nanomaterials based on pristine halloysite. The mesoscopic structure of the nanocomposites was correlated with their tensile, thermal, and wettability properties, which were found to be strongly dependent on both the nature of the polymer and the HNT functionalization. The attained knowledge represents a basic point for designing new hybrid nanostructures that are useful in specific purposes such as biocompatible packaging.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |