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

M. Lehtonen, M. Merinen, PO Kilpeläinen, Chunlin Xu, Stefan Willför, KS Mikkonen

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

18 Citeringar (Scopus)
3 Nedladdningar (Pure)

Sammanfattning

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.
OriginalspråkOdefinierat/okänt
Sidor (från-till)536–547
Antal sidor12
TidskriftJournal of Colloid and Interface Science
Volym512
DOI
StatusPublicerad - 2018
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • Phenolic residues
  • Emulsion stability
  • Spruce galactoglucomannans

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