Sorption Behavior of Selected Aldehyde-scavenging Agents in Poly(ethylene terephthalate) Blends

• Published in: Journal of food science Vol. 68; no. 6; pp. 2028 - 2033
• Main Authors: Suloff, E.C, Marcy, J.E, Blakistone, B.A, Duncan, S.E, Long, T.E, O'Keefe, S.F
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.08.2003; Wiley Subscription Services, Inc
• Subjects: active packaging; aldehydes; ethylene; Food packaging; Food science; molecular weight; nylon; partition coefficients; scalping; scavenging; sorbitol; sorption
• ISSN: 0022-1147; 1750-3841
• DOI: 10.1111/j.1365-2621.2003.tb07013.x

Poly(m-xylylene adipamide) (nylon MXD6), D-sorbitol, and a-cyclodextrin aldehyde-scavenging agents were blended with poly(ethylene terephthalate) and thermally pressed into films. Films were stored in an acidified aqueous model solution (pH 3.6) containing a 25 μM mixture of acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, and caproaldehyde for 1, 3, 7, and 14 d. The total amount of aldehydes sorbed by films was 2 to 10 times higher for films containing aldehyde-scavenging agents than nonblended films. Aldehyde-scavenging films demonstrated selective scalping, preferring smaller molecular weight aldehydes to larger aldehydes. Partition coefficients for smaller aldehydes were 3 to 6 times greater for aldehyde-scavenging films than control film.