6533b830fe1ef96bd1297cdf
RESEARCH PRODUCT
Thermo-oxidative stabilization of poly(lactic acid)-based nanocomposites through the incorporation of clay with in-built antioxidant activity
Elisabetta MoriciSahar Al-malaikaRossella ArrigoNadka Tzankova Dintchevasubject
Materials Chemistry2506 Metals and AlloysAntioxidantMaterials sciencePolymers and Plasticsmedicine.medical_treatmentSurfaces Coatings and FilmSalt (chemistry)02 engineering and technologybio-based nanocomposites; montmorillonite; poly(lactic acid) (PLA); thermo-oxidative stability; Chemistry (all); Surfaces Coatings and Films; Polymers and Plastics; Materials Chemistry; 2506; Metals and Alloysmontmorillonite010402 general chemistry01 natural sciencescomplex mixturesCoatings and Filmschemistry.chemical_compoundPolylactic acidpoly(lactic acid) (PLA)medicineMaterials ChemistryOrganic chemistrythermo-oxidative stabilitychemistry.chemical_classificationPolymers and PlasticNanocompositebio-based nanocompositesChemistry (all)Metals and AlloysGeneral ChemistryPolymer021001 nanoscience & nanotechnologybio-based nanocomposite0104 chemical sciencesSurfaces Coatings and FilmsLactic acidSurfacesMontmorillonitechemistryChemical engineering25060210 nano-technologyDispersion (chemistry)description
In this work, an innovative approach to overcome the issue of the poor thermo-oxidative stability of polymer/clay nanocomposites is proposed. Specifically, biodegradable poly(lactic acid) (PLA)-based nanocomposites, containing organo-modified clay with in-built antioxidant activity, were prepared. Through a two-step chemical protocol, a hindered phenol antioxidant was chemically linked to the ammonium quaternary salt which was then intercalated between the clay platelets [(AO)OM-Mt]. The nanocomposites were characterized and their thermo-oxidative stability during melt processing and under long-term thermal test conditions was investigated. PLA nanocomposites containing the (AO)OM-Mt showed higher oxidative stability, along with better clay dispersion, compared to PLA-nanocomposites containing commercial clay and a free hindered phenol antioxidant. Obtained results can be explained considering that (AO)OM-Mt may act locally, at the interface, between the silicate layers and the polymer macromolecules, thus contributing to the observed improved stability of the polymer both during processing and under long-term thermal-oxidative conditions. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44974.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-20 |