Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 111, Issue 1, Pages 191-196Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1321797111
Keywords
amyloid materials; chemisorption; designed fibers
Categories
Funding
- Department of Energy BER [DE-FC03-02ER63421]
- National Science Foundation [MCB-0958111]
- Howard Hughes Medical Institute
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [0958111] Funding Source: National Science Foundation
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New materials capable of binding carbon dioxide are essential for addressing climate change. Here, we demonstrate that amyloids, self-assembling protein fibers, are effective for selective carbon dioxide capture. Solid-state NMR proves that amyloid fibers containing alkylamine groups reversibly bind carbon dioxide via carbamate formation. Thermodynamic and kinetic capture-and-release tests show the carbamate formation rate is fast enough to capture carbon dioxide by dynamic separation, undiminished by the presence of water, in both a natural amyloid and designed amyloids having increased carbon dioxide capacity. Heating to 100 degrees C regenerates the material. These results demonstrate the potential of amyloid fibers for environmental carbon dioxide capture.
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