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The effects of coat...
The effects of coating structure and water-holding capacity on the oxygen-scavenging ability of enzymes embedded in the coating layer
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- Johansson, Kristin (författare)
- Karlstads universitet,Institutionen för ingenjörs- och kemivetenskaper (from 2013)
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- Christophliemk, Hanna, 1973- (författare)
- Energy and Process Engineering, Tampere University of Technology
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- Johansson, Caisa (författare)
- Karlstads universitet,Paper Surface Centre,Institutionen för ingenjörs- och kemivetenskaper (from 2013)
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- Jönsson, Leif (författare)
- Umeå universitet,Kemiska institutionen,Kemiska institutionen, Department of Chemistry, Umeå Universitet
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- Järnström, Lars, 1954- (författare)
- Karlstads universitet,Avdelningen för kemiteknik,Paper Surface Centre
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(creator_code:org_t)
- TAPPI Press, 2013
- 2013
- Engelska.
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Ingår i: TAPPI Journal. - : TAPPI Press. - 0734-1415. ; 12:6, s. 43-52
- Relaterad länk:
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Enzymes catalyzing oxygen scavenging were embedded in latex-based coatings with and without barrier kaolin clay to produce material for active packages. The clay was used to create a porous structure, and the closed-structure matrix consisted of a biopolymer comprising either starch or gelatin to increase the water uptake of the coating. The effects of the porous open structure and of the water uptake of the coated layer on the oxygen-scavenging ability of the embedded enzymes were examined at both 75% and 100% relative humidity. The results showed that the porous clay structure led to higher oxygen-scavenging capacity than that of a closed structure at both test conditions by enabling a high diffusion rate for oxygen and glucose to the active sites of the enzymes. The addition of a water-holding biopolymer did not always significantly affect the oxygen-scavenging capacity. However for a less-porous layer at 100% relative humidity, an increase in the amount of biopolymer resulted in an increase in oxygen-scavenging capacity. The results were treated statistically using multiple-factor analysis where the most important factor for the oxygen-scavenging ability was found to be the addition of clay. The coatings were also characterized with respect to water vapor uptake, overall migration, porosity, and scanning electron microscopy images.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinsk bioteknologi -- Biomaterialvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Medical Biotechnology -- Biomaterials Science (hsv//eng)
Nyckelord
- Active packaging
- oxygen scavenging
- enzymes
- coating
- Chemical Engineering
- Kemiteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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