| Full text | |
| Author(s): |
Braga, Natalia F.
[1]
;
da Silva, Ana Paula
[1]
;
Arantes, Tatiane Moraes
[2]
;
Lemes, Ana Paula
[1]
;
Cristovan, Fernando Henrique
[1]
Total Authors: 5
|
| Affiliation: | [1] Fed Univ Sao Paulo UNIFESP, Dept Sci & Technol, BR-12231280 Sao Jose Dos Campos, SP - Brazil
[2] Fed Univ Goias UFG, Dept Chem, BR-75801615 Jatai, Go - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | MATERIALS RESEARCH EXPRESS; v. 5, n. 1 JAN 2018. |
| Web of Science Citations: | 4 |
| Abstract | |
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was reinforced with titanium dioxide (TiO2) in concentrations of 1.0%, 2.5% and 5.0% (m/m) to produce nanocomposites by the solvent casting technique. TiO2 was synthesized by a hydrothermal treatment to produce nanoparticles. The nanostructure of the nanoparticles was studied by x-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The XRD confirmed TiO2 crystalline nanoparticles, with a mixture of anatase and rutile phases. Through TEM analysis, the formation of TiO2 nanorod agglomerates with an average diameter and length of 40 and 12 nm, respectively, was observed. The thermal and mechanical properties of the pure PHBV and nanocomposite films were characterized by differential scanning calorimetry (DSC) and dynamic mechanical analysis. The DSC analysis showed that the glass transition temperature decreased with the inclusion of TiO2 in the PHBV matrix in relation to pure PHBV. The results of biodegradation assays for the PHBV and nanocomposites in an aqueous medium and in soil showed morphological and structural changes for all samples, indicating a high biodegradation rate for this material. The most important conclusion is that the biodegradation of the PHBV was not affected by the addition of nanoparticles, thus enabling the use of nanocomposites in applications requiring biodegradable materials. (AU) | |
| FAPESP's process: | 13/14954-6 - Preparation and characterization of structural nanocomposites of biocompatible polymer with TiO2 nanoparticles for use in Tissue Engineering |
| Grantee: | Natália Ferreira Braga |
| Support Opportunities: | Scholarships in Brazil - Master |