Thermotropic, Side-Chain Ordered Polymeric Coatings: Gas Permeability Switching via a Thermal Stimulus

Document Type

Article

Publication Date

3-1-2014

Department

Polymers and High Performance Materials

Abstract

Rapid access to large areas of stimuli-responsive materials is attractive in the field of membrane science for purification systems and molecular valves. Thermotropic liquid crystalline (LC) systems show sharp property changes through the smectic-LC transition induced by temperature. Comparison of similar amorphous and liquid crystalline systems allows for the elucidation of the characteristics of the LC phase. Lightly crosslinked C6F13 and C8F17 perfluorinated side-chain acrylate networks were UV cured as thin films resulting in amorphous and thermotropic liquid crystalline thin films, respectively. Thermal and morphological characterization indicates a restructuring of the liquid crystalline phase through the isotropic transition giving rise to an increase in transport and free volume properties. The amorphous film showed no dramatic change in transport or free volume properties.

Publication Title

Journal of Coatings Technology and Research

Volume

11

Issue

2

First Page

123

Last Page

129

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