title: Modulation of cellulose nanocrystals amphiphilic properties to stabilize oil/water interface.
abstract: Neutral cellulose nanocrystals dispersed in water were shown in a previous work to stabilize oil/water interfaces and produce Pickering emulsions with outstanding stability, whereas sulfated nanocrystals obtained from cotton did not show interfacial properties. To develop a better understanding of the stabilization mechanism, amphiphilic properties of the nanocrystals were modulated by tuning the surface charge density to investigate emulsifying capability on two sources of cellulose: cotton linters (CCN) and bacterial cellulose (BCN). This charge adjustment made it possible to determine the conditions where a low surface charge density, below 0.03 e/nm(2), remains compatible with emulsification, as well as when assisted by charge screening regardless of the source. This study discusses this ability to stabilize oil-in-water emulsions for cellulose nanocrystals varying in crystalline allomorph, morphology, and hydrolysis processes related to the amphiphilic character of nonhydrophobized cellulose nanocrystal.
authors: INRA, UR1268 Biopolymeres Interactions Assemblages, 44316 Nantes, France.
authors: Irina
authors: I
authors: Kalashnikova
authors: Hervé
authors: H
authors: Bizot
authors: Bernard
authors: B
authors: Cathala
authors: Isabelle
authors: I
authors: Capron
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D032561:Cotton Fiber; D004655:Emulsions / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009821:Oils / Q000737:chemistry*; D044367:Phase Transition
chemical_list: D004655:Emulsions; D009821:Oils; D002482:Cellulose