Journal Article/Contribution to a conference proceedings

IMPULSE-2021-00008

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Open Volumes Structure and Molecular Transport in Biopolymer Nanocomposites

Checchetto, R. (Corresponding author) ; Penasa, L. ; Dickmann, M.MLZ* ; Egger, W.MLZ* ; Tarter, S. ; Brusa, R. S.

2020
Acad. Inst. Warsaw

Please use a persistent id in citations: doi:10.12693/APhysPolA.137.118

Abstract: We discuss gas barrier mechanisms in biopolymer nanocomposite in which fillers of different natures andconcentrations are added. The kinetics of gas transport is studied by gas phase permeation techniques and freevolumes are analyzed by positron annihilation lifetime spectroscopy. Gas barrier properties of two biopolymernanocomposite films are presented in relation to their free volume. The first film is poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) containing 0.25 wt% of graphene oxide (GO) filler nanoparticles. The second film ispoly(lactic acid) (PLA) in which cellulose nanofibrils have been dispersed with content from 4.1 to 12.4 vol.%. Itis shown that in both biopolymer films the filler addition improves their gas barrier properties but with differentmechanism.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Materials Science (2nd) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. NEPOMUC (NEPOMUC)

Experiment(s):

1. NEPOMUC: Neutron induced positron source munich (SR11)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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