Phenolic residues in spruce galactoglucomannans improve stabilization of oil-in-water emulsions

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: M. Lehtonen, M. Merinen, P.O. Kilpeläinen, C. Xu, S.M. Willför, K.S. Mikkonen
Förläggare: Elsevier
Publiceringsår: 2018
Tidskrift: Journal of Colloid and Interface Science
Tidskriftsakronym: J. Colloid Interface Sci.
Volym: 512
Artikelns första sida, sidnummer: 536
Artikelns sista sida, sidnummer: 547
Antal sidor: 12
ISSN: 0021-9797
eISSN: 1095-7103


Abstrakt

Hypothesis: Amphiphilic character of surfactants drives them at the interface of dispersed systems, such as emulsions. Hemicellulose-rich wood extracts contain assemblies (lignin-carbohydrate complexes, LCC) with natural amphiphilicity, which is expected to depend on their chemical composition resulting from the isolation method. Lignin-derived phenolic residues associated with hemicelluloses are hypothesized to contribute to emulsions' interfacial properties and stability.

Experiments: We investigated the role of phenolic residues in spruce hemicellulose extracts in the stabilization of oil-in-water emulsions by physical and chemical approach. Distribution and changes occurring in the phenolic residues at the droplet interface and in the continuous phase were studied during an accelerated storage test. Meanwhile, the physical stability and lipid oxidation in emulsions were monitored.

Findings: Naturally associated lignin residues in GGM act as vehicles for anchoring these hemicelluloses into the oil droplet interface and further enable superior stabilization of emulsions. By adjusting the isolation method of GGM regarding their phenolic profile, their functionalities, especially interfacial behavior, can be altered. Retaining the native interactions of GGM and phenolic residues is suggested for efficient physical stabilization and extended protection against lipid oxidation. The results can be widely applied as guidelines in tailoring natural or synthetic amphiphilic compounds for interfacial stabilization.


Nyckelord

Emulsion stability, Phenolic residues, Spruce galactoglucomannans

Senast uppdaterad 2019-19-11 vid 02:46