Vetrano, Barbara (2013) Effect of Halloysite nanotubes on properties of biodegradable PBAT/PHBV blend. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Effect of Halloysite nanotubes on properties of biodegradable PBAT/PHBV blend |
| Autori: | Autore Email Vetrano, Barbara barbara.vetrano@unina.it |
| Data: | 2 Aprile 2013 |
| Numero di pagine: | 138 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria Chimica, dei Materiali e della Produzione Industriale |
| Scuola di dottorato: | Ingegneria industriale |
| Dottorato: | Ingegneria dei materiali e delle strutture |
| Ciclo di dottorato: | 24 |
| Coordinatore del Corso di dottorato: | nome email Mensitieri, Giuseppe giuseppe.mensitieri@unina.it |
| Tutor: | nome email Mensitieri, Giuseppe mensitie@unina.it Russo, Pietro pietro.russo@unina.it |
| Data: | 2 Aprile 2013 |
| Numero di pagine: | 138 |
| Parole chiave: | biodegradable, halloysite, nanocomposite |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 - Scienza e tecnologia dei materiali |
| Aree tematiche (7° programma Quadro): | NANOSCIENZE, NANOTECNOLOGIE, MATERIALE E PRODUZIONE > Materiali |
| Depositato il: | 08 Apr 2013 10:13 |
| Ultima modifica: | 17 Giu 2014 06:04 |
| URI: | http://www.fedoa.unina.it/id/eprint/9430 |
Abstract
Fully biodegradable composites based on a commercial PBAT/PHBV blend with varying concentrations of neat or silanized Halloysite nanotubes (HNTs) were prepared by twin-screw extrusion and filmed by melt blowing process. Thermal analysis suggested the simultaneous occurrence for the PHBV phase of both homogeneous crystallization and heterogeneous nucleation promoted by the included fillers. On the contrary, crystallization behaviour of the PBAT phase was not affected by the nanotubes. X-ray diffraction analysis (XRD) indicated that the process of film blowing enables the formation of more perfect crystals and favors the orientation of the included nanotubes. Mechanical tests demonstrated that strength and modulus of nanocomposite systems significantly increase with addition of halloysites without significant loss of ductility. Functionalization of HNTs resulted in further improvement in mechanical properties owing to a better interfacial adhesion. Rheological investigations revealed that the inclusion of halloysites resulted in increases of both the elastic modulus and the complex viscosity even if no percolating phenomena seems to occur on the filler loading range considered. Finally, the filler did not significantly alter the extrudability of the hosting matrix.
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