Thermoresponsive Shape-Memory Aerogels from Thiol–Ene Networks

详细信息    查看全文

• 作者：Brian T. Michal ; William A. Brenn ; Baochau N. Nguyen ; Linda S. McCorkle ; Mary Ann B. Meador ; Stuart J. Rowan
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：April 12, 2016
• 年：2016
• 卷：28
• 期：7
• 页码：2341-2347
• 全文大小：431K
• 年卷期：0
• ISSN：1520-5002

文摘

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.