Thermotropic, side-chain ordered polymeric coatings: gas permeability switching via a thermal stimulus
| Autor: | James T. Goetz, Sergei Nazarenko |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Acrylate
Materials science Surfaces and Interfaces General Chemistry Permeation Thermotropic crystal eye diseases Surfaces Coatings and Films Amorphous solid chemistry.chemical_compound Colloid and Surface Chemistry Membrane chemistry Chemical engineering Phase (matter) Side chain Organic chemistry sense organs Thin film |
| Zdroj: | Journal of Coatings Technology and Research. 11:123-129 |
| ISSN: | 1935-3804 1547-0091 |
| DOI: | 10.1007/s11998-013-9518-y |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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