Reaction-induced macropore formation enabling commodity polymer derived carbons for CO₂ capture

Abstract

CO2 capture from industrial point source waste streams represents an important need for achieving the global goal of carbon-neutrality. Compared with conventional liquid sorbents, solid sorbents can exhibit several distinct...

Precursor design for efficient synthesis of large-pore, sulfur-doped ordered mesoporous carbon through direct pyrolysis

“…For example, sulfonation induced-crosslinking of SEBS leads to an expanded domain spacing from 25.5 nm to 38.0 nm with a reduced degree of ordering, which can be attributed to the competition between nanostructure rearrangement/ordering and crosslinking-induced hindered chain mobility. Moreover, a previous work has demonstrated that while sulfonation poly(styrene)-block-poly(isoprene)-block-poly(styrene) (SIS) can proceed vigorously, 28 the intense reaction can result in rapid release of gaseous byproducts and strongly disrupt the ordered nanostructure of the BCP precursor. Therefore, it is important to assess how the sulfonation reaction impacts the nanostructure development of SBS materials.…”

“…A previous work explored the opportunity of employing SIS as porous carbon precursor, however, the polyisoprene segment was highly reactive, and the rigorous sulfonation reaction led to completely disordered nanostructures after the crosslinking step. 28 In this work, we report how the design of TPE precursors and engineering of the fabrication process can improve the synthesis of OMCs, including significantly accelerated sulfonation-crosslinking reaction kinetics and improved degree of ordering. Specifically, polystyrene-blockpolybutadiene-block-polystyrene (SBS) is used as a nanostructured precursor.…”

Direct Upcycling of Woven Polypropylene Fabrics to Carbon‐Based Joule Heaters

“…Note that sulfonation does not lead any major structural disruption in this study, which is different from other amorphous polyolefin systems. [ 50 ] Sulfonated samples were then washed in acetone to remove byproducts and residual acid and dried prior to the carbonization step. Figure a shows the carbon yield of PP textiles as a function of their sulfonation‐induced crosslinking time.…”

Research Experiences via Integrating Simulations and Experiments (REVISE): A Model Collaborative Research Project for Undergraduate Students in CO2 Sorbent Design

“…Porous carbons with several heteroatom identities were prepared by undergraduate students throughout a three-week period following procedures outlined in the Supporting Information. Briefly, doped porous carbons can serve as CO 2 sorbents, , where pore surfaces serve as CO 2 sorption sites and heteroatom doping can alter interactions between the carbon surface and sorbates (Figure a). The experimental portion of this research project includes the synthesis and characterization of doped OMC through a soft-templating approach following an established protocol in which the heteroatom doping type and content can be controlled through altering processing conditions (Figure b).…”