Electrospinning technology has been used to prepare fiber structures. In our work, we use it to synthesize structured adsorbents by combining solid porous materials. These core-shell structures have potentials to increase loading capacity of active species and/or attenuate contaminants uptake by forming a protective shell on the external surfaces of a porous adsorbent particle. These materials function by a kinetically selective mechanism, where the shell provides a barrier that slows the releasing rate of active components through either a solution-diffusion or molecular sieving mechanism. One critical factor to consider is the shell thickness, which controls the diffusional barrier. However, currently used models do not address the shell thickness as a parameter at all. It is essential for predictive kinetic equations to be developed for the field of core-shell sorbent design to progress. In this work, we solve the diffusion equations for core-shell sorbents using finite-element methods and compare to a derived analytical model to describe the uptake equations for core-shell sorbents. We also use CO2/N2 separation as a good example to demonstrate the potential of electrospun nanoparticle/nanofiber composites (ENNCs) as new core-shell adsorbent materials.<br/><br/>

Electrospun nanoparticle/nanofiber composites (ENNCs) as structured adsorbents

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.