Effect of incorporation of graphene oxide and graphene nanoplatelets on mechanical and gas permeability properties of poly(lactic acid) films

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Artur M. Pinto (Author) FEUP; Joana Cabral (Author) FCUP; David A. Pacheco Tanaka (Author) FEUP; Adélio M. Mendes (Author) FEUP; Fernão D. Magalhães (Author) FEUP

Journal

Title: Polymer International

Vol. 62

Pages: 33-40

ISSN: 0959-8103

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 130 Citations

ISI Web of Science

Scopus - 188 Citations

INSPEC

Scientific classification

FOS: Natural sciences > Chemical sciences

Associated Projects

UI0511 - PROJECTO ESTRATÉGICO - UI 511 - 2013-2014

Other information

Authenticus ID: P-002-1T3

DOI: 10.1002/pi.4290

Abstract (EN): Nanocomposite thin films of poly(lactic acid) (PLA) were produced incorporating small amounts (0.2 to 1 wt%) of graphene oxide (GO) and graphene nanoplatelets (GNP). The films were prepared by solvent-casting. Mechanical properties were evaluated for plasticized (by residual solvent) and unplasticized films. Plasticized nanocomposite films presented yield strength and Young's modulus about 100% higher than those of pristine PLA. For unplasticized films improvements in tensile strength and Young's modulus were about 15 and 85%, respectively. For both film types, a maximum in mechanical performance was identified for about 0.4 wt% loadings of the two filler materials tested. Permeabilities towards oxygen and nitrogen decreased, respectively, three-and fourfold in films loaded with both GO or GNP. The glass transition temperature showed maximum increases, in relation to unloaded PLA films, of 5 degrees C for 0.4 wt% GO and 7 degrees C for 0.4 wt% GNP, coinciding with the observed maxima in mechanical properties. (C) 2012 Society of Chemical Industry

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8