An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Thickness-dependent Swelling of Molecular Layer-by-Layer Polyamide Nanomembranes
Published
Author(s)
Edwin P. Chan, Stephen Lee
Abstract
The thickness-dependent water vapor swelling of molecular layer-by-layer polyamide films is studied via specular X-ray reflectivity. The maximum swelling ratio of these ultrathin films scale inversely with thickness but more importantly show a dual-mode sorption behavior characterized by Langmuir-like sorption at low relative humidity and gel-like swelling at high relative humidity thus suggesting the presence of a phase transition. The thickness-dependent network parameters are extracted using a proposed model that builds on Painter-Shenoy network swelling model while taking into account the glass- to-gel-like phase transition at a critical swelling ratio, which also scales inversely with thickness.
Chan, E.
and Lee, S.
(2017),
Thickness-dependent Swelling of Molecular Layer-by-Layer Polyamide Nanomembranes, Journal of Polymer Science Part B-Polymer Physics
(Accessed May 28, 2023)