SciELO - Scientific Electronic Library Online

 
vol.29 issue3Extraction and analysis of the parietal polysaccharides of acorn pericarps from Quercus treesInfluence of ZnO on the properties of elastomeric compositions and their leached extract author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Polímeros

Print version ISSN 0104-1428On-line version ISSN 1678-5169

Abstract

BARBOSA, Josiane Dantas Viana et al. Bionanocomposites of PLA/PBAT/organophilic clay: preparation and characterization. Polímeros [online]. 2019, vol.29, n.3, e2019045.  Epub Nov 04, 2019. ISSN 1678-5169.  https://doi.org/10.1590/0104-1428.09018.

The objective of this study was to develop bionanocomposites from blends of poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) and from 3% and 6% bentonite clay. Initially, the bentonite clay was treated with Praepagen salt, and the properties of the modified clay were evaluated. After the organophilization of the clay was completed, 50:50 blends of PLA/PBAT were prepared, and 3 and 6% clay was added. To test the dispersion of the system, the blending sequence was performed using eight different sequences for the addition of clay to the PLA/PBAT matrices. The mixtures were prepared in a twin screw extruder, and the specimens were subsequently injection molded. The investigated mechanical and morphological properties included the yield strength, yield strain, tensile and bending elastic modulus, and scanning and transmission electron microscopy analyses. The results of this study showed increases of the mechanical properties when nanoparticles were added and the formation of bionanocomposites with intercalated structures.

Keywords : bionanocomposite; nanoclay; PBAT; PLA; bionanocomposites.

        · text in English     · English ( pdf )