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Updated: Feb 7, 2026

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Microporous Polymer Networks for Carbon Capture Applications.

Beatriz Lopez-Iglesias¹, Fabián Suárez-García², Carla Aguilar-Lugo³

¹IU CINQUIMA, Universidad de Valladolid , Paseo Belén 5 , E-47011 Valladolid , Spain.

ACS Applied Materials & Interfaces

|July 13, 2018

Summary

New porous polymer networks synthesized using aromatic monomers and ketones exhibit high thermal stability and excellent carbon dioxide (CO2) uptake. These materials are promising, regenerable industrial adsorbents for CO2 capture.

Keywords:

CO2 uptake DFT molecular simulation SEAr condensation microporosity porous polymer networks postcombustion thermal stability

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Area of Science:

Materials Science
Polymer Chemistry
Chemical Engineering

Background:

Development of advanced porous materials is crucial for efficient gas separation and capture.
Existing adsorbents often face limitations in stability, capacity, or regeneration efficiency.
Novel synthetic strategies are needed to create high-performance porous polymers.

Purpose of the Study:

To synthesize a new generation of porous polymer networks.
To evaluate their properties, including porosity, surface area, thermal stability, and CO2 adsorption capacity.
To assess their potential as industrial adsorbents for carbon dioxide capture.

Main Methods:

Reaction of trifunctional aromatic monomers (1,3,5-triphenylbenzene, triptycene) with electron-deficient ketones (trifluoroacetophenone, isatin) in superacidic media.
Characterization of the resulting amorphous microporous networks using techniques like Brunauer-Emmett-Teller (BET) analysis.
Evaluation of CO2 adsorption capacity and selectivity under various conditions, including postcombustion scenarios.

Main Results:

Quantitative yield of amorphous microporous polymer networks with moderate BET surface areas (580–790 m² g⁻¹).
High thermal stability and significant narrow microporosity contribution, especially with isatin.
Excellent CO2 uptake capacity (up to 207 mg g⁻¹ at 0 °C/1 bar) and efficient regeneration via vacuum.
Comparable CO2/N2 selectivities to existing organic porous networks under postcombustion conditions.

Conclusions:

The developed porous polymer networks offer a promising combination of high CO2 uptake, thermal stability, and regenerability.
The scalable synthetic method makes these materials attractive for industrial applications in carbon dioxide capture.
Favorable interactions between lactam functionalities and CO2 contribute to the observed high adsorption performance.