Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings


Autoria(s): Nyflött, Åsa; Axrup, Lars; Gunilla, Carlsson; Järnström, Lars; Lestelius, Magnus; Moons, Ellen; Wahlström, Torbjörn
Data(s)

2015

Resumo

The permeability of dispersion barriers produced from polyvinyl alcohol (PVOH) and kaolin clay blends coated onto polymeric supports has been studied by employing two different measurement methods: the oxygen transmission rate (OTR) and the ambient oxygen ingress rate (AOIR). Coatings with different thicknesses and kaolin contents were studied. Structural information of the dispersion-barrier coatings was obtained by Fourier transform infrared spectroscopy (FTIR) spectroscopy and scanning electron microscopy (SEM). These results showed that the kaolin content influences both the orientation of the kaolin and the degree of crystallinity of the PVOH coating. Increased kaolin content increased the alignment of the kaolin platelets to the basal plane of the coating. Higher kaolin content was accompanied by higher degree of crystallinity of the PVOH. The barrier thickness proved to be less important in the early stages of the mass transport process, whereas it had a significant influence on the steady-state permeability. The results from this study demonstrate the need for better understanding of how permeability is influenced by (chemical and physical) structure.

<p>Ingår i lic.uppsats Structural Studies and Modelling of Oxygen Transport in Barrier Materials for Food Packaging som manuskript med titeln: Influence of kaolin addition in polyvinyl alcohol dispersion coating on the dynamics of oxygen mass transport.</p>

Formato

application/pdf

Identificador

http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-34457

doi:10.3183/NPPRJ-2015-30-03-p385-392

ISI:000361615500002

Idioma(s)

eng

Publicador

Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper

Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper

Karlstads universitet, Avdelningen för kemiteknik

Karlstads universitet, Paper Surface Centre

Karlstads universitet, Avdelningen för kemiteknik

Karlstads universitet, Paper Surface Centre

Karlstads universitet, Materialvetenskap

Karlstads universitet, Avdelningen för fysik och elektroteknik

Stora Enso

Stora Enso

Relação

Nordic Pulp & Paper Research Journal, 0283-2631, 2015, 30:3, s. 385-392

Direitos

info:eu-repo/semantics/openAccess

Palavras-Chave #Barrier coating #Dynamic mass transport #Kaolin #Permeability #Polyvinyl alcohol
Tipo

Article in journal

info:eu-repo/semantics/article

text