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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.
Citation
Journal of Polymer Science Part B-Polymer Physics

Keywords

membranes, networks, polyamides, swelling, thin films, X-ray

Citation

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 April 24, 2024)
Created March 1, 2017, Updated March 22, 2017