Fabrication of PEI‐grafted porous polymer foam for CO₂ capture

Abstract

A polymer foam material with both the open‐cell porous structure and the polyethylenemine (PEI)‐grafted inner face was constructed for CO2 capture. The porous poly(tert‐butyl acrylate) foam was first prepared via a concentrated emulsion polymerization, and then the carboxyl groups were introduced on the interface of porous polymer after the hydrolysis reaction. Subsequently, the surface of the foam was grafted with PEI, and finally the PEI‐grafted porous polymer foam designed as a CO2 capture material was obtained. The structures of the foams were characterized by infrared spectroscopy, EDS, and SEM. The CO2 adsorption properties were measured by adsorption/desorption cycles. As a result, the polymer foam contained a large number of amine groups (13.9 wt % N), and therefore possessed a high CO2 adsorption capacity (5.91 mmol g−1 at 40°C and 100 kPa). In addition, they also exhibited high CO2 adsorption rate, good selectivity for CO2‐N2 separation, and good stability according to CO2 cyclic adsorption/desorption test. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47844.

Alkyl-Aryl Amine-Rich Molecules for CO2 Removal via Direct Air Capture

“…30,31 Depending on their porosity, solid supports are able to carry varied amounts of amine content. 31−33 Mesoporous silicas, 10,34 alumina, 35 zeolites, 13 graphene oxide, 36 porous polymers, 37 carbons, 38 MOFs, 39 and carbon nanotubes 40 are a few examples of supports investigated for extending the library of aminecontaining composite materials for CO 2 . 41−44 These supports can often provide thermal stability and prolong the lifetime of amine sorbents because of their improved stability under ambient and elevated temperature conditions.…”

“…One of the simplest and most promising approaches to decreasing the process costs of solid-based DAC is the use of alkyl amine molecules or macromolecules as class 1 sorbents. The most commonly used method for the preparation of these composite materials is solution impregnation, leading to both physical binding of amine molecules to the substrate surface and partial or complete pore filling. , Depending on their porosity, solid supports are able to carry varied amounts of amine content. − Mesoporous silicas, , alumina, zeolites, graphene oxide, porous polymers, carbons, MOFs, and carbon nanotubes are a few examples of supports investigated for extending the library of amine-containing composite materials for CO 2 . − These supports can often provide thermal stability and prolong the lifetime of amine sorbents because of their improved stability under ambient and elevated temperature conditions.…”

Preparation of biomass‐derived phosphorus‐doped microporous carbon material and its application in dye adsorption and CO2 capture

“…In addition, it shows ultra‐high adsorption properties for methyl orange, methylene blue, and CO 2 , making them excellent environmental protection adsorbents. Currently, effective adsorbents include zeolite molecular sieves, 12,13 porous carbon materials, 14,15 porous polymers, 16,17 and metal organic frameworks (MOF) 18,19 . Among them, porous carbon materials have been widely used in electrochemistry, gas adsorption, heterogeneous catalysis, and other fields due to their adjustable pore structure, large specific surface area, excellent chemical stability, easy processing, and simple preparation 20–22 .…”

Polyethyleneimine-Modified Amorphous Silica for the Selective Adsorption of CO2/N2 at High Temperatures

“…Particularly, it is of high significance for the capture of high-temperature flue gases in thermal power plants (CO 2 /N 2 of about 0.15/0.85) . Solid amine adsorbents have the advantage of both physisorption and chemisorption, which makes them one of the most promising methods for capturing CO 2 . , Therefore, many porous materials are widely used as an amine support for the physical and chemical adsorption of CO 2 , including porous carbon, , mesoporous silica, − zeolites, , porous polymers, , and metal–organic frameworks (MOFs). , As mentioned above, mesoporous silica is widely used as a support to immobilize amines due to its good thermal stability, high pore volume, and abundance of surface silica hydroxyl groups. ,, …”