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Coating the Right Polymer: Achieving Ideal Metal–Organic Framework Particle Dispersibility in Polymer Matrixes Using a Coordinative Crosslinking Surface Modification Method
Author(s) -
Li Conger,
Liu Junhong,
Zhang Kexin,
Zhang Songwei,
Lee Yongjin,
Li Tao
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202104487
Subject(s) - polymer , materials science , polyimide , chemical engineering , coating , dispersion (optics) , polysulfone , surface modification , polycarbonate , metal , particle (ecology) , adsorption , polymer chemistry , metal organic framework , layer (electronics) , composite material , chemistry , organic chemistry , physics , optics , engineering , metallurgy , oceanography , geology
This work describes the first generalizable method to modify various metal–organic framework (MOF) surfaces with polyimide, polysulfone, polycarbonate, and polymer of intrinsic microporosity‐1 (PIM‐1). The method first utilizes electrostatic adsorption to rapidly decorate positively charged MOF surfaces with a layer of negatively charged metal‐organic nanocapsule, PgC 5 Cu. After mixing with the polymer, the copper open metal sites on PgC 5 Cu can coordinatively crosslink the polar functional groups on the surface polymer upon thermal activation thereby resulting in the immobilization of a uniform sub‐10 nm polymer coating. We quantitatively analyzed the distribution of free path spacing between MOF particles and demonstrated that when the surface polymer matches the matrix polymer, the MOF dispersion was not only visually improved but also found to align perfectly with a theoretically predicted ideal dispersion model where no aggregation driving force was present.