On the use of ball milling to develop poly(3-hydroxybutyrate-co-3-hydroxyvalerate)-graphene nanocomposites (II)—Mechanical, barrier, and electrical properties
| Autor: | Jesús Ambrosio-Martín, Jose M. Lagaron, Amparo López-Rubio, Giuliana Gorrasi, Luis Cabedo Mas, María José Fabra, Miguel A. López-Manchado |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Nanocomposite
Materials science Morphology (linguistics) Polymers and Plastics biopolymers & renewable polymers Percolation threshold General Chemistry Conductivity Surfaces Coatings and Films Crystallinity Biopolymers and renewable polymers Percolation theory Blends graphene and fullerenes Materials Chemistry blends Composite material Graphene and fullerenes Dispersion (chemistry) Ball mill |
| Zdroj: | Repositori Universitat Jaume I Universitat Jaume I Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | In this work, poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanocomposites containing functionalized graphene sheets (FGS) were prepared by means of high-energy ball milling. The crystalline structure, oxygen barrier, mechanical and electrical properties, and biodegradability of the developed nanocomposites were analyzed and correlated with the amount of FGS incorporated and with their morphology, which was reported in a previous study. Addition of FGS into the PHBV matrix did not affect the crystal morphology of the material but led to somewhat enhanced crystallinity. The good dispersion and distribution of the nanofiller within the polymeric matrix, revealed in the first part of this study, was thought to be crucial for the mechanical reinforcing effect of FGS and also resulted in enhanced gas barrier properties at high relative humidity. Additionally, the conducting behavior of the nanocomposites, as interpreted by the percolation theory, displayed a very low percolation threshold set at ∼0.3 vol % of FGS, while the materials exhibited an overall significantly enhanced conductivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|