DUPRÉ DE BAUBIGNY, J; PERRIN, P.; PANTOUSTIER, N.; SALEZ, Thomas; REYSSAT, M.; MONTEUX, C.

doi:10.1021/acsmacrolett.0c00847

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

DUPRÉ DE BAUBIGNY, J
Sciences et Ingénierie de la Matière Molle (UMR 7615) [SIMM]

PERRIN, P.
Sciences et Ingénierie de la Matière Molle (UMR 7615) [SIMM]

PANTOUSTIER, N.
Sciences et Ingénierie de la Matière Molle (UMR 7615) [SIMM]

Langue

Article de revue

Ce document a été publié dans

ACS Macro Letters. 2021, vol. 10, n° 2, p. 204-209

Washington, D.C : American Chemical Society

Résumé en anglais

Complexation of polymers at liquid interfaces is an emerging technique to produce all-liquid printable and self-healing devices and membranes. It is crucial to control the assembly process but the mechanisms at play remain unclear. Using two different reflectometric methods, we investigate the spontaneous growth of H-bonded PPO-PMAA membranes at a flat liquid-liquid interface. We find that the membrane thickness h grows with time t as h~t^(1/2), which is reminiscent of a diffusion-limited process. However, counter-intuitively, we observe that this process is faster as the PPO molar mass increases. We are able to rationalize these results with a model which considers the diffusion of the PPO chains within the growing membrane. The architecture of the latter is described as a gel-like porous network, with a pore size much smaller than the radius of the diffusing PPO chains, thus inducing entropic barriers that hinder the diffusion process. From the comparison between the experimental data and the result of the model, we extract some key piece of information about the microscopic structure of the membrane. This study opens the route toward the rational design of self-assembled membranes and capsules with optimal properties.< Réduire

Métadonnées

Licence d’utilisation du document

Growth mechanism of polymer membranes obtained by H-bonding across immiscible liquid interfaces

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche