POS4-0859
Structural Optimization of Cellulose Nanocrystal-Stabilized Rosin Amine Pickering Emulsions
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
Jeongki Kim (Kyungpook National University)
Co-Author(s)
Abstract
This study examines the stabilization behavior of bio-based Pickering emulsions prepared using cellulose nanocrystals (CNCs) as solid stabilizers and rosin amine as a functional oil phase. CNCs can adsorb at oil–water interfaces owing to their rigid crystalline structure and surface functionality, and this interfacial adsorption is expected to contribute to emulsion stabilization. Here, we investigated the effects of CNC concentration and rosin amine content on the morphology and stability of the emulsions. The droplet morphology, size distribution, and phase stability were compared by varying the CNC-to-rosin amine ratio. As the relative CNC content increased, the emulsion droplets became more effectively stabilized, which was attributed to improved particle coverage at the rosin amine/water interface. In contrast, emulsions prepared with insufficient CNC content showed less stable droplet structures and a greater tendency toward phase separation. These results indicate that the balance between CNC loading and oil-phase content is an important factor in controlling the structure and stability of rosin amine Pickering emulsions. Under appropriate formulation conditions, CNCs can provide an interfacial barrier around rosin amine droplets and reduce emulsion destabilization. This work suggests that controlling the particle-to-oil ratio is a useful strategy for designing CNC-stabilized, bio-based Pickering emulsions for potential coating applications.
Acknowledgement: This work was supported by the Ministry of Trade, Industry & Energy of the Republic of Korea (RS-2024-00430401, RS-2025-11162970) and undertaken at Kyungpook National University, was supported by the Regional Innovation System & Education (RISE) program through the Daegu RISE Center, funded by the Ministry of Education (MOE) and the Daegu Metropolitan City, Republic of Korea (2025-RISE-03-001).
Acknowledgement: This work was supported by the Ministry of Trade, Industry & Energy of the Republic of Korea (RS-2024-00430401, RS-2025-11162970) and undertaken at Kyungpook National University, was supported by the Regional Innovation System & Education (RISE) program through the Daegu RISE Center, funded by the Ministry of Education (MOE) and the Daegu Metropolitan City, Republic of Korea (2025-RISE-03-001).
