Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper (from 2013).
Stora Enso.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper (from 2013).ORCID-id: 0000-0001-7235-0905
Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Avdelningen för kemiteknik. Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Paper Surface Centre.ORCID-id: 0000-0002-1256-1708
Visa övriga samt affilieringar
2015 (Engelska)Ingår i: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 30, nr 3, s. 385-392Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
2015. Vol. 30, nr 3, s. 385-392
Nyckelord [en]
Barrier coating, Dynamic mass transport, Kaolin, Permeability, Polyvinyl alcohol
Nationell ämneskategori
Kemiteknik
Forskningsämne
Kemiteknik
Identifikatorer
URN: urn:nbn:se:kau:diva-34457DOI: 10.3183/NPPRJ-2015-30-03-p385-392ISI: 000361615500002OAI: oai:DiVA.org:kau-34457DiVA, id: diva2:757421
Forskningsfinansiär
KK-stiftelsen
Anmärkning

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.

Tillgänglig från: 2014-10-22 Skapad: 2014-10-22 Senast uppdaterad: 2019-07-10Bibliografiskt granskad
Ingår i avhandling
1. Structural Studies and Modelling of Oxygen Transport in Barrier Materials for Food Packaging
Öppna denna publikation i ny flik eller fönster >>Structural Studies and Modelling of Oxygen Transport in Barrier Materials for Food Packaging
2014 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The requirements of food packages are to ensure food safety and quality, to minimize spoilage, and to provide an easy way to store and handle food. To meet these demands for fibre-based food packages, barrier coatings are generally used to regulate the amount of gases entering a package, as some gases are detrimental to food quality. Oxygen, for example, initiates lipid oxidation in fatty foods. Bakery products may also be sensitive to oxygen.

This thesis focused on mass transport of oxygen in order to gain deeper knowledge in the performance of barrier coatings and to develop means to optimize the performance of barrier coatings. This experimental study along with computer modelling characterized the structure of barrier materials with respect to the mass transport process.This project was performed as part of the multidisciplinary industrial graduate school VIPP (www.kau.se/en/vipp) - Values Created in Fibre Based Processes and Products – at Karlstad University, with the financial support from the Knowledge Foundation, Sweden, and Stora Enso.

Ort, förlag, år, upplaga, sidor
Karlstad: Karlstads universitet, 2014. s. 45
Serie
Karlstad University Studies, ISSN 1403-8099 ; 2014:64
Nyckelord
Barrier coating; Permeability; Dynamic Mass Transport; Modeling; Diffusion; Polymer; Dispersion; Kaolin
Nationell ämneskategori
Polymerteknologi Kemiteknik
Forskningsämne
Materialvetenskap
Identifikatorer
urn:nbn:se:kau:diva-34468 (URN)978-91-7063-604-2 (ISBN)
Presentation
2014-12-11, Eva Eriksson, 21A 342, 10:15 (Svenska)
Opponent
Handledare
Anmärkning

Artikel 2 "The influence of clay orientation..." ingick som manuskript i avhandlingen, då med titeln: "Influence of clay orientation in dispersion barrier coatings on oxygen permeation". Nu publicerad.

Tillgänglig från: 2014-11-20 Skapad: 2014-10-23 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
2. Structure-Performance Relations of Oxygen Barriers for Food Packaging
Öppna denna publikation i ny flik eller fönster >>Structure-Performance Relations of Oxygen Barriers for Food Packaging
2017 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Food packaging should ensure the safety and quality of food, minimize spoilage and provide an easy way of storing and handling it. Barrier coatings are generally used to meet the demands placed on fibre-based food packages, as these have the ability to regulate the amount of gases that can enter them. Some gases are detrimental to food quality: oxygen, for example, initiates lipid oxidation in fatty foods. Using both experimental data and computer modelling, this thesis explains some aspects of how the structure of barrier coatings influences the mass transport of oxygen with the aim of obtaining essential knowledge that can be used to optimize the performance of barriers.

Barrier coatings are produced from polyvinyl alcohol and kaolin blends that are coated onto a polymeric support. The chemical and physical structures of these barriers were characterized according to their influence on permeability in various climates. At a low concentration of kaolin, the crystallinity of polyvinyl alcohol decreased; in the thinner films, the kaolin particles were orientated in the basal plane of the barrier coating. The experimental results indicated a complex interplay between the polymer and the filler with respect to permeability.

A computer model for permeability incorporating theories for the filled polymeric layer to include the polymer crystallinity, addition of filler, filler aspect ratio and surrounding moisture was developed. The model shows that mass transport was affected by the aspect ratio of the clay in combination with the clay concentration, as well as the polymer crystallinity. The combined model agreed with the experiments, showing that it is possible to combine different theories into one model that can be used to predict the mass transport.

Four barrier coatings: polyethylene, ethylene vinyl alcohol + kaolin, latex + kaolin and starch were evaluated using the parameters of greenhouse gas emissions and product costs. After the production of the barrier material, the coating process and the end-of-life handling scenarios were analysed, it emerged that starch had the lowest environmental impact and latex + kaolin had the highest.

Abstract [en]

Food packaging is required to secure the safety and quality of food, as well as minimize spoilage and simplify handling. Barrier coatings are generally used to meet the demands placed on fibre-based food packages, as these have the ability to regulate the amount of gases that can enter them. Some gases are detrimental to food quality: oxygen, for example, initiates lipid oxidation in fatty foods.

This thesis focuses on the mass transport of oxygen in order to gain deeper knowledge of, and thereby optimise, the performance of barrier coatings. This experimental study, together with computer modelling, characterized the structure of barrier materials with respect to the mass transport process. The performance of the barriers was evaluated based on the parameters of environmental impact and product costs. As the long-term aim is to use non-petroleum-based barrier coatings for packaging, these should be evaluated by assessing the properties of the material in question, its functionality and its environmental impact to provide more insight into which materials are desirable as well as to develop technology.

The results from this study indicate that several parameters (the orientation, concentration and aspect ratio of the clay and the polymer crystallinity) influence the properties of a barrier. Using this knowledge, researchers and food packaging engineers can work toward improving and customising renewable barriers.

Ort, förlag, år, upplaga, sidor
Karlstad: Karlstads universitet, 2017. s. 100
Serie
Karlstad University Studies, ISSN 1403-8099 ; 2017:3
Nyckelord
Barrier coating, Permeability, Dynamic Mass Transport, Modelling, Diffusion, Polymer, Dispersion, Kaolin, LCA, Starch, Hemicellulose
Nationell ämneskategori
Polymerteknologi Textil-, gummi- och polymermaterial Beräkningsmatematik Livsmedelsteknik Kompositmaterial och -teknik Pappers-, massa- och fiberteknik
Forskningsämne
Materialvetenskap
Identifikatorer
urn:nbn:se:kau:diva-47496 (URN)978-91-7063-738-4 (ISBN)978-91-7063-739-1 (ISBN)
Disputation
2017-02-10, Eva Eriksson, 21A342, Karlstad, 10:00 (Engelska)
Opponent
Handledare
Projekt
VIPP
Forskningsfinansiär
KK-stiftelsen, 20100268Stora Enso
Tillgänglig från: 2017-01-24 Skapad: 2016-12-13 Senast uppdaterad: 2019-07-11Bibliografiskt granskad

Open Access i DiVA

fulltext(781 kB)191 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 781 kBChecksumma SHA-512
969a8cc48507798fa6482123ecc9231bbbb564a9d26f8abfd9c34d7aed3c9ddd9925fa8595fea21255c58889cbea6b856f4671751e119c6a383ee8df688252cf
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltext

Personposter BETA

Nyflött, ÅsaCarlsson, GunillaJärnström, LarsLestelius, MagnusMoons, Ellen

Sök vidare i DiVA

Av författaren/redaktören
Nyflött, ÅsaCarlsson, GunillaJärnström, LarsLestelius, MagnusMoons, Ellen
Av organisationen
Institutionen för ingenjörs- och kemivetenskaper (from 2013)Avdelningen för kemiteknikPaper Surface CentrePaper Surface CentreMaterialvetenskapAvdelningen för fysik och elektroteknik
I samma tidskrift
Nordic Pulp & Paper Research Journal
Kemiteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 191 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 585 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf