Accessing pluripotent materials through tempering of dynamic covalent polymer networks

• 成果类型: Article
• 署名作者: Boynton, Nicholas R.; Dennis, Joseph M.; Dolinski, Neil D.; Lindberg, Charlie A.; Kotula, Anthony P.; Grocke, Garrett L.; Vivod, Stephanie L.; Lenhart, Joseph L.; Patel, Shrayesh N.; Rowan, Stuart J.
• 署名单位: University of Chicago; National Institute of Standards & Technology (NIST) - USA; National Aeronautics & Space Administration (NASA); NASA Glenn Research Center; United States Department of Energy (DOE); Argonne National Laboratory; University of Chicago
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-14051
• DOI: 10.1126/science.adi5009
• 发表日期: 2024-02-02
• 页码: 545-+
• 关键词: cross-link density; chemistry

摘要

Pluripotency, which is defined as a system not fixed as to its developmental potentialities, is typically associated with biology and stem cells. Inspired by this concept, we report synthetic polymers that act as a single pluripotent feedstock and can be differentiated into a range of materials that exhibit different mechanical properties, from hard and brittle to soft and extensible. To achieve this, we have exploited dynamic covalent networks that contain labile, dynamic thia-Michael bonds, whose extent of bonding can be thermally modulated and retained through tempering, akin to the process used in metallurgy. In addition, we show that the shape memory behavior of these materials can be tailored through tempering and that these materials can be patterned to spatially control mechanical properties.