Carbonyl-Incorporated Aromatic Hyper-Cross-Linked Polymers with Microporous Structure and Their Functional Materials for CO₂ Adsorption

Abstract

As promising adsorbents in carbon capture and storage, hyper-cross-linked polymers (HCPs) require high CO 2 uptake and selectivity over N 2 and CH 4 . Herein, we reported a series of novel carbonyl-incorporated HCPs using oxalyl chloride as a cross-linker. To enhance the CO 2 adsorption capacity and gas selectivity, the fabricated HCPs were further modified by methods of amine functionalization (HCPs-N) and KOH activated carbonization (HCPs-C). Accordingly, the maximum CO 2 adsorption capacity of HCPs (HCP3) reaches 198 mg/g owing to abundant carbonyl groups and dominant microporous structures (S BET 1047 m 2 /g, S micro 628 m 2 /g). Meanwhile, under the effect of amine functionalization, the selectivity of the obtained HCPs-N (HCP3-N) is greatly improved, reaching a maximum of 85.71 (SCO 2 /N 2 ) and 8.12 (SCO 2 /CH 4 ). Furthermore, after KOH activated carbonization, the amount of CO 2 adsorption of HCPs-C (HCP3-C) significantly increases to 270 mg/g due to the higher specific surface area (S BET 1421 m 2 /g) and arising ultramicroporous structures (V ultra 0.26 cm 3 /g). Aromatic polymers with microporous structures and carbonyl group can be prepared and functionalized to improve the CO 2 adsorption and gas selectivity by simple and mild reactions. Our study provides new options for CO 2 capture of HCPs and provides a new idea for the synthesis of new HCPs.

Construction of Hierarchical Porous Polycyanurate Networks with Cobaltoporphyrin for CO2 Adsorption and Efficient Conversion to Cyclic Di- and Tri-Carbonates

“…The development of porous organic polymers (POPs) with large specific surface areas is currently one of the most intensely studied subjects in functional polymers and nanomaterials owing to their promising applications in CO 2 capture and separations, − heterogeneous catalysis, − chemosensing, − and so forth. According to chemical composition, POPs can be roughly classified into two catalogues: C–H-type porous polymers composed of only carbon and hydrogen elements (CH-POPs) and heteroatom-type porous polymers (HA-POPs) that contain large amounts of heteroatoms such as nitrogen and oxygen in the skeleton.…”

Crystallization behavior analysis and reducing thermal shrinkage of poly(lactic acid) miscibilized with poly(butylene succinate) film for food packaging

“…The binding-energy range of 0-1000 eV was acquired to investigate the C1s (300-276.9 eV), consisting of three overlapping peaks: hydrocarbon main chain ( C H / C C , C) at 285.0 eV, ether (C O C) at 286.5 eV, and ester ( O C O , COO) at 289.0 eV. 28,29 PLA chemically modified with PBS by bifunctional SA was quantified in terms of COO/C intensity ratio, according to Equation (1).…”

Cost-Effective Nanoporous Hypercross-linked Polymers Could Drastically Promote the CO2 Absorption Rate in Amine-Based Solvents, Improving Energy-Efficient CO2 Capture

“…HCPs are a class of nanoporous materials with a high surface area, developing rapidly over the past few decades. , HCPs manifest numerous remarkable advantages such as moderate synthetic conditions, easy functionalization, robust and tunable structures, and excellent physiochemical and thermal stability. Also, an enormous stockroom of inexpensive monomers makes them cost-effective candidates for a wide range of potential applications, including gas sorption, water treatment and purification, molecular separation, heterogeneous catalysis, drug delivery, and so on. − In this work, we developed a novel slurry concept based on the idea that HCPs can improve the efficiency of the amine-based CO 2 capture process. Two HCP networks, HCP-S and HCP-B, were prepared and then added to the MDEA solution to overcome the major drawback of tertiary amines: the slow reactivity with CO 2 .…”