Products Cited in Publications Worldwide Heavy metal removal using structured sorbents 3D printed from carbon nanotube-enriched polymer solutions

Heavy metal removal using structured sorbents 3D printed from carbon nanotube-enriched polymer solutions

Xu, Jialing; Slykas, Cheryl; Braegelman, Adam S.; Alvarez, Kevin Gabriel; Kasl, Thomas; Boudouris, Bryan W.; Webber, Matthew J.; Sharma, Vivek; Phillip, William A.

DOI:

Abstract

Sorbents with structures tailored at the mol. through device scales are needed to meet the demand for separations that can isolate trace analytes from complex mixtures Here, direct-ink-writing three-dimensional (3D) printing is combined with a surface-segregation and vapor-induced phase separation (SVIPS) process to create hierarchically structured sorbents that satisfy this criterion. Composite inks containing polysulfone, polystyrene-block-poly(acrylic acid) (PS-PAA), and carbon nanotubes (CNTs) were formulated to allow these processes to proceed simultaneously. Enriching the inks with CNTs modulated their rheol. characteristics such that microstructured sorbents with permeabilities of ∼105 L m-2 h-1 bar-1 could be printed. The SVIPS process generated an interconnected network of PAA-lined nanopores whose chem. was tailored to produce sorbents that recovered Co2+ selectively from mixtures of Co2+ and Li+ and efficiently treated sub-ppm feed solutions under dynamic flow conditions. The versatile combination of 3D printing and SVIPS provides new strategies for manufacturing next-generation sorbents with structures controlled across multiple length scales.

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A212007128143-89-597%

4'-Chloro-2,2':6',2''-terpyridine

135.0/5g

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