Thermoresponsive Shape-Memory Aerogels from Thiol–Ene Networks

Thermoresponsive shape-memory polymer aerogels have been produced from thiol–ene networks of 1,6-hexanedithiol, pentaerythritol tetrakis­(3-mercaptopropionate), and triallyl-1,3,5-triazine-2,4,6-trione. The thiol–ene networks form organogels with either acetonitrile or acetone as the solvent, which...

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Bibliographic Details
Published inChemistry of materials Vol. 28; no. 7; pp. 2341 - 2347
Main Authors Michal, Brian T, Brenn, William A, Nguyen, Baochau N, McCorkle, Linda S, Meador, Mary Ann B, Rowan, Stuart J
Format Journal Article
LanguageEnglish
Published American Chemical Society 12.04.2016
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Summary:Thermoresponsive shape-memory polymer aerogels have been produced from thiol–ene networks of 1,6-hexanedithiol, pentaerythritol tetrakis­(3-mercaptopropionate), and triallyl-1,3,5-triazine-2,4,6-trione. The thiol–ene networks form organogels with either acetonitrile or acetone as the solvent, which can be subsequently removed using supercritical CO2 extraction. The resulting aerogels have nearly quantitative shape fixing and shape recovery with a glass transition temperature ranging from 42 to 64 °C, which serves as the thermal transition trigger for the shape-memory effect. The aerogels have a porosity of 72% to 81% but surface areas of only 5–10 m2/g.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.6b00474