Comment on the article Primary structure of gum arabic and its dynamics at oil/water interface by Isobe et al.: The primary structure of gum Arabic species is not two-dimensional

Kevin Roger (1)

1 LGC - Laboratoire de Génie Chimique

We argue against the structural interpretation given in the paper doi.org/10.1016/j.carbpol.2020.116843 that the primary structure of gum Arabic species is a disk-like nanoparticle. We show that both our and Isobe et al.’s SAXS data are comparable, which demonstrates we have investigated the same type of gum Arabic. However, we also show that two-dimensional models, as first proposed by Renard, Sanchez and coworkers, fail to fit SAXS curves adequately. We have rather proposed a three-dimensional multi-scale porous structure, consistently with the three well defined correlation distances that are observed in the SAXS curves. We also briefly argue against the loosely covered schematisation of the oil/water interface chosen by the authors, which is unrealistic when discussing emulsion metastability.

Mots clés: Comment; Gum Arabic; Primary structure

Domaines: Polymères

Kevin Roger. Comment on the article Primary structure of gum arabic and its dynamics at oil/water interface by Isobe et al.: The primary structure of gum Arabic species is not two-dimensional. Carbohydrate Polymers, 2020, 253, pp.117234. ⟨10.1016/j.carbpol.2020.117234⟩. ⟨hal-03077526⟩