期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 45, 页码 12142-12147出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201407978
关键词
carbohydrates; carbonate formation; carbon dioxide; polyurethanes; self-repairing polymers
资金
- U.S. Army Engineering Research and Development Center (ERDC) [W7132T-09-2-0019]
- National Science Foundation [CMMI 1332964]
- J. E. Sirrine Foundation Endowment at Clemson University
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1332964] Funding Source: National Science Foundation
Sugar moieties were incorporated into cross-linked polyurethane (PUR) networks in an effort to achieve self-repairing in the presence of atmospheric carbon dioxide (CO2) and water (H2O). When methyl-alpha-D-glucopyranoside (MGP) molecules are reacted with hexamethylene diisocyanate trimer (HDI) and polyethylene glycol (PEG) to form cross-linked MGP-polyurethane (PUR) networks, these materials are capable of self-repairing in air. This process requires atmospheric amounts of CO2 and H2O, thus resembling plant behavior of carbon fixation during the photosynthesis cycle. Molecular processes responsible for this unique self-repair process involve physical diffusion of cleaved network segments as well as the formation of carbonate and urethane linkages. Unlike plants, MGP-PUR networks require no photo-initiated reactions, and they are thus capable of repair in darkness under atmospheric conditions.
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