Co-encapsulation of L-ascorbic acid and quercetin by gelatin/sodium carboxymethyl cellulose coacervates using different interlayer oils

•Double emulsion prior to complex coacervation was effective for co-encapsulation.•Mononuclear ellipse-like shape was obtained at 2% total biopolymer concentration.•Structural similarity of conjugated linoleic acid and PGPR damaged co-encapsulation.•The capsules made by conjugated linoleic acid has worst encapsulation of vitamin C.•Quercetin carried by conjugated linoleic acid and fish oil got better encapsulation.