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Effects of degree of enzymatic interesterification on the physical properties of margarine fats – Solid fat content, crystallization behavior, crystal morphology and crystal network
YKI – Ytkemiska institutet.
2004 (Engelska)Ingår i: Journal of Agricultural and Food Chemistry, ISSN 0021-8561, E-ISSN 1520-5118, Vol. 52, s. 4423-4431Artikel i tidskrift (Refereegranskat)
Abstract [en]

In this study enzymatic-interesterified margarine fats with different conversion degrees were produced in a packed bed reactor. The effects of conversion degree on the formation of free fatty acids and diglycerides, solid fat content, crystallization behavior, microstructure, and crystal network were investigated and the enzymatically interesterified products were compared with a chemically esterified product. Formation of free fatty acids, and diacyglycerols increased slightly with increasing conversion degree. The solid fat content was higher at 10 and 20∞C and lower at 30, 35, and 40∞C with the increasing conversion degree. Addition of 50% of rapeseed oil into the blend and products caused the content of b to decreas from 100 to 33, and 30% and eventually to pure b’ crystal. However, double chain packing was observed both for the blend and products. Isothermal crystallization kinetics was characterized by the Fisher-Turnbull model. Highest free energy was observed for the blend. Small deformation with oscillation tests shows significant difference between the blend and interesterified products. The differences of microstructure between the blend, different conversion degree and chemical randomized product were observed. Lipozyme TL IM, interesterification, packed-bed reactor, crystallization, nuclear magnetic resonance (NMR), DSC, X-ray, and light microscopy.

Ort, förlag, år, upplaga, sidor
2004. Vol. 52, s. 4423-4431
Nyckelord [en]
Lipozyme TL IM, interesterification, packed-bed reactor, crystallization, nuclear magnetic resonance (NMR), DSC, X-ray, light microscopy
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-26608OAI: oai:DiVA.org:ri-26608DiVA, id: diva2:1053611
Anmärkning
A1679Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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