Synthesis and CO2 Capture of Porous Hydrogel Particles Consisting of Hyperbranched Poly(amidoamine)s

Abstract

We successfully synthesized new macroporous hydrogel particles consisting of hyperbranched poly(amidoamine)s (HPAMAM) using the Oil-in-Water-in-Oil (O/W/O) suspension polymerization method at both the 50 mL flask scale and the 5 L reactor scale. The pore sizes and particle sizes were easily tuned by controlling the agitation speeds during the polymerization reaction. Since O/W/O suspension polymerization gives porous architecture to the microparticles, synthesized hydrogel particles having abundant amine groups inside polymers exhibited a high CO2 absorption capacity (104 mg/g) and a fast absorption rate in a packed-column test.

Amine Infused Fly Ash Grafted Acrylic Acid/Acrylamide Hydrogel for Carbon Dioxide (CO2) Adsorption and Its Kinetic Analysis

“…Similarly, Choi et al (2022) employed the in-situ method to bond hyperbranched poly(amidoamine)s on the ethylenediamine via oil-water-oil suspension polymerization and successfully formed microporous hydrogel particles that exhibited a CO 2 adsorption capacity of 104.4 mg/g from flue gas in its dry state. The average pore size of the particles also varies from 2.9 µm to 1.3 µm depending on the agitation speed [ 7 ]. In another study, Kim et al (2021) physically impregnated MEA into the dried hydrogel, resulting in an amine infused hydrogel (AIHs) with increased CO 2 selectivity in the methane/CO 2 mixture gas system compared to bulk MEA solution [ 8 ].…”

Physicochemical synergistic adsorption of CO2 by PEI‐impregnated hierarchical porous polymers

“…On the other hand, chemical adsorption was carried out by the amino groups surface functionalized micro‐particles 18 and porous polymer supporters 9,19,20 . Three functionalization approaches have been developed, including impregnation of amine into the porous matrix, 21 formation of covalent bonds between the porous surface and amine‐containing molecules, and in‐situ polymerization 22 .…”

“…Zhang et al, 17 designed porous organic polymers with N and Si as center species and the surface areas of 303 and 848 m 2 /g, respectively. The dipole-quadrupole interaction between CO 2 molecules and N/Si center species improved the CO 2 adsorption capacity of materials, which showed the highest CO 2 adsorption of 11.5 and 12.2 wt% at 273 K. On the other hand, chemical adsorption was carried out by the amino groups surface functionalized micro-particles 18 and porous polymer supporters. 9,19,20 Three functionalization approaches have been developed, including impregnation of amine into the porous matrix, 21 formation of covalent bonds between the porous surface and amine-containing molecules, and in-situ polymerization.…”

Functionalized Gels for Environmental Applications

“…In this case, the hydrogel is based on a mixture of chitosan, polyethylene glycol and xanthan gum (CPX), and it is prepared via a green method. The authors characterize the materials well and find that the swelling properties remain unchanged in a wide range of pH (3)(4)(5)(6)(7)(8)(9). Moreover, the adsorption capacity study reveals that the adsorbent hydrogel reaches the adsorption capacity (172.41 mg/g) at the highest adsorbent amount (200 mg) after 350 min.…”

“…Nowadays, the detection and removal of the CO 2 that naturally occurs in the Earth's atmosphere and is produced abundantly by many industrial processes in high demand, since excessive concentrations can pose hazards to both human health and the environment. Within this framework, H. Choi et al [8] successfully fabricate novel macroporous hydrogel particles comprising hyperbranched poly(amidoamine)s (HPAMAM) utilizing the oil-inwater-in-oil (O/W/O) suspension polymerization technique. This method, known for conferring a porous architecture to microparticles, results in hydrogel particles with a rich abundance of amine groups embedded within the polymer matrix.…”