Artie McFerrin Department of Chemical Engineering Texas A&,M University 77843‐3122 TAMU College Station TX 77843‐3122 USA
Environmental Molecular Sciences Laboratory (EMSL) Pacific Northwest National Laboratory Richland WA 99352 USA
Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
Energy &, Environment Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
Artie McFerrin Department of Chemical Engineering Texas A&,M University 77843‐3122 TAMU College Station TX 77843‐3122 USA, Department of Materials Science &, Engineering Texas A&,M University 3122 TAMU College Station TX 77843‐3122 USA
Metal organic frameworks (MOFs) have gained attention for their porosity, size selectivity, and structural diversity. There is a need for MOF‐based coatings, particularly in applications such as separations, electronics, and energy; yet forming thin, functional, conformal coatings is prohibitive because MOFs exist as a powder. Layer‐by‐layer assembly, a versatile thin film coating approach, offers a unique solution to this problem, but this approach requires MOFs that are water‐dispersible and bear a surface charge. Here, these issues are addressed by examining water‐based dispersions of MIL‐101(Cr) that facilitate the formation of robust polymer–MOF hybrid coatings. Specifically, the substrate to be coated is alternately exposed to an aqueous solution of poly(styrene sulfonate) and nano MIL‐101(Cr) dispersion, yielding linear film growth and coatings with a MOF content as high as 77 wt%. This approach is surface‐agnostic, in which the coating is successfully applied to silicon, glass, flexible plastic, and even cotton fabric, conformally coating individual fibers. By contrast, prior attempts at forming MOF‐coatings are severely limited to a handful of surfaces, require harsh chemical treatment, and are not conformal. The approach presented here unambiguously confirms that MOFs can be conformally coated onto complex and unusual surfaces, opening the door for a wide variety of applications.
@article{osti_1401504,
author = {De, Souvik and Nandasiri, Manjula I. and Schaef, Herbert T. and McGrail, Benard Peter and Nune, Satish K. and Lutkenhaus, Jodie L.},
title = {Water‐Based Assembly of Polymer–Metal Organic Framework (MOF) Functional Coatings},
annote = {Metal organic frameworks (MOFs) have gained attention for their porosity, size selectivity, and structural diversity. There is a need for MOF‐based coatings, particularly in applications such as separations, electronics, and energy; yet forming thin, functional, conformal coatings is prohibitive because MOFs exist as a powder. Layer‐by‐layer assembly, a versatile thin film coating approach, offers a unique solution to this problem, but this approach requires MOFs that are water‐dispersible and bear a surface charge. Here, these issues are addressed by examining water‐based dispersions of MIL‐101(Cr) that facilitate the formation of robust polymer–MOF hybrid coatings. Specifically, the substrate to be coated is alternately exposed to an aqueous solution of poly(styrene sulfonate) and nano MIL‐101(Cr) dispersion, yielding linear film growth and coatings with a MOF content as high as 77 wt%. This approach is surface‐agnostic, in which the coating is successfully applied to silicon, glass, flexible plastic, and even cotton fabric, conformally coating individual fibers. By contrast, prior attempts at forming MOF‐coatings are severely limited to a handful of surfaces, require harsh chemical treatment, and are not conformal. The approach presented here unambiguously confirms that MOFs can be conformally coated onto complex and unusual surfaces, opening the door for a wide variety of applications.},
doi = {10.1002/admi.201600905},
url = {https://www.osti.gov/biblio/1401504},
journal = {Advanced Materials Interfaces},
issn = {ISSN 2196-7350},
number = {2},
volume = {4},
place = {Germany},
publisher = {Wiley Blackwell (John Wiley & Sons)},
year = {2016},
month = {12}}