title: Designed amyloid fibers as materials for selective carbon dioxide capture.
abstract: 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 °C regenerates the material. These results demonstrate the potential of amyloid fibers for environmental carbon dioxide capture.
authors.affiliation: University of California, Los Angeles-Department of Energy Institute for Genomics and Proteomics, and Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Furukawa
authors.forename: Hexiang
authors.initials: H
authors.lastname: Deng
authors.forename: Cong
authors.initials: C
authors.lastname: Liu
authors.forename: Omar M
authors.initials: OM
authors.lastname: Yaghi
authors.forename: David S
authors.initials: DS
authors.lastname: Eisenberg
mesh_terms: D000327:Adsorption; D000682:Amyloid / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D052918:Environmental Restoration and Remediation; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D046529:Microscopy, Electron, Transmission; D008870:Microtubules / Q000737:chemistry; D011312:Pressure; D011487:Protein Conformation; D015202:Protein Engineering / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013696:Temperature; D013816:Thermodynamics; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D016875:tau Proteins / Q000737:chemistry
chemical_list: D000682:Amyloid; D016875:tau Proteins; D014867:Water; D002245:Carbon Dioxide
keywords: amyloid materials; chemisorption; designed fibers