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Aging of whey prote...
Aging of whey protein films and the effect on mechanical and barrier properties
- Artikel/kapitelEngelska2001
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2001-02-02
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American Chemical Society (ACS),2001
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:ri-8788
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-8788URI
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https://doi.org/10.1021/jf000730qDOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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This work focuses on the aging of whey protein isolate (WPI) films plasticized with glycerol (G) and sorbitol (S). The films were cast from heated aqueous solutions at pH 7 and dried at 23 °C and 50% relative humidity (RH) for 16 h. They were stored in a climate room (23 °C, 50% RH) for 120 days, and the film properties were measured at regular intervals. The moisture content (MC) of the WPI/G films decreased from 22% (2 days) to 15% (45 days) and was thereafter constant at 15% (up to 120 days). This affected the mechanical properties and caused an increased stress at break (from 2.7 to 8.3 MPa), a decreased strain at break (from 33 to 4%), and an increased glass transition temperature (T g) (from -56 to -45 °C). The barrier properties were, however, unaffected, with constant water vapor permeability and a uniform film thickness. The MC of the WPI/S films was constant at ?9%, which gave no change in film properties.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Stading, MatsRISE,SIK – Institutet för livsmedel och bioteknik(Swepub:ri)matsst@ri.se
(författare)
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Hermansson, Ann-MarieRISE,SIK – Institutet för livsmedel och bioteknik
(författare)
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RISESIK – Institutet för livsmedel och bioteknik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Agricultural and Food Chemistry: American Chemical Society (ACS)49:2, s. 989-9950021-85611520-5118
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