Stabilization of high internal phase Pickering emulsions by functional dialdehyde Xylan-based complexes

This study aims to develop a sustainable and facile strategy for fabricating high internal phase Pickering emulsions (HIPE) using polymeric xylan-based particles. A series of amphiphilic dialdehyde xylan-benzylamine complexes (DBCs) were synthesized via an interfacial Schiff base reaction. The research investigated the effects of the aldehyde content and the molar ratio of benzylamine, on the resulting amphiphilicity and nanoparticle morphology. Results demonstrated that precisely regulating these parameters enabled the formation of stable gel-like HIPE with internal phase volumes reaching up to 90%. The optimized HIPE-DBCs_10.33-10 exhibited excellent stability across varying pH and ionic strength conditions, while rheological characterizations confirmed pronounced shear thinning behavior and solid-like viscoelastic properties. Furthermore, the developed HIPE inks showed outstanding 3D printability with high structural integrity and no oil leakage during the extrusion process. This work provides a versatile and eco-friendly approach to constructing functional HIPE, offering significant potential for advanced applications in food engineering.