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Selective separation of polyelectrolyte nanoparticles based on formation of hydrogen-bonding interpolymer complexes
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Selective separation of polyelectrolyte nanoparticles based on formation of hydrogen-bonding interpolymer complexes
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Journal Article
Selective separation of polyelectrolyte nanoparticles based on formation of hydrogen-bonding interpolymer complexes
2021
Overview
Nano-spherical polyelectrolyte brushes (SPBs) have been demonstrated to be versatile objects for many high-tech applications due to their unique microenvironment and impressive stability in aqueous media, showing great prospects in industry. However, the recycling of valuable SPBs is still a big obstacle, thereby limiting their industrial applications. Here, we show a facile approach to efficiently separate SPBs from aqueous latex solution on the basis of spherical poly(acrylic acid) brushes with a polystyrene core (PS-PAA brushes). Upon addition of poly(ethylene oxide) (PEO), hydrogen-bonding interpolymer complexes consisting of PS-PAA brushes and PEO are formed at pH below 3.5, leading to selective separation of the PS-PAA brushes from aqueous media containing other nanoparticles. Near all of the brushes are separated at pH below 3.0 regardless of the ion strengths. Importantly, the brushes can be easily redispersed by simply increasing pH, showing ignorable variations of the intrinsic properties like diameter, surface charge and light transmittance. As an application example, a catalytic nanoreactor is developed by loading sliver nanoparticles (Ag NPs) in PS-PAA brushes which show neglectable deteriorations of catalysis on the model reaction even after four separation–redispersion cycles. This work provides a simple way for selective separation of SPBs, which may benefit for industrial applications of SPBs.
Publisher
Springer Nature B.V
