Preparation and performance for CO₂ adsorption of large‐scale microporous fiber membrane based on electrostatic spinning technology

Abstract

Although nano‐porous materials are widely used, they are still difficult to prepare in large size and expand flexibly. In this work, a new method for the synthesis of porous materials is proposed. First, the block polymers were prepared by atom transfer radical polymerization. Through electrostatic spinning, the fiber films were fabricated, then the fibers were modified by surface post‐treatment and related Friedel–Crafts alkylation reaction. The pore and CO2 adsorption properties of the porous fiber films are characterized by nitrogen adsorption–desorption isotherm. In order to improve the pore properties and CO2 adsorption properties of thin films, the additives and pretreatment process are optimized. The maximum specific surface area of the porous fiber membrane is determined to be 640 m2/g, and the CO2 adsorption capacity is high up to 36.3 wt.% (8.68 mmol/g). Moreover, the porous fiber membrane derived from this strategy is superior in the aspects of large size, convenient adjustment and simple processing, which makes up for the drawbacks of traditional porous materials. The fiber membrane obtained by this strategy has high productivity, and the fiber membrane is easy to be postprocessed, which can be integrated into functional devices, and is widely used.

Versatile Hyper-Cross-Linked Polymers Derived from Waste Polystyrene: Synthesis, Properties, and Intentional Recycling

“…The hyper-cross-linked nature imparts a robust framework to these polymer materials, which contain multiple permanent micropores that remain stable even in a dry state, and substantially enhance thermal stability. 83 Interestingly, the reported PS nanofiber membrane demonstrates high porosity and an SSA of 640 cm 3 •g −1 , surpassing traditional fiber membranes by a wide margin. Owing to these properties, the membranes exhibited a remarkable CO 2 adsorption capacity and continuous adsorption/desorption cycle characteristics.…”

“…(b) Synthetic scheme of P(tBA)- b -P(St) hyper-cross-linked fiber membrane. Reproduced with permission from ref . Copyright 2022 Wiley.…”

“…These membranes possess high SSA and impressive hyper-cross-linking characteristics, owing to their outstanding 3D interconnected hierarchical pore structures at the molecular level. The hyper-cross-linked nature imparts a robust framework to these polymer materials, which contain multiple permanent micropores that remain stable even in a dry state, and substantially enhance thermal stability …”

Scale-Up Fabrication of Fiber Membrane Based on Nanoporous Polyurea Colloids for Organic Solvents/Water Separation

“…41 Nevertheless, limited scalability is still the greatest bottleneck for the practical application owing to the high-cost building units, inferior scalability, and inadequate integrity of POPs in membrane. 42,43 In this study, a POP membrane using an electrospun technique based on poly(vinyl alcohol) (PVA) and polyurea nanoporous colloids is constructed with a hierarchical porous structure and large-scale size for organic removal. The polyurea colloids (PUCs) with excellent pore structure were synthesized in a scale-up way by facile one-pot polymerization.…”

“…Therefore, homogeneous blending that can maintain the original structure and mechanical properties of the membrane and provide excellent pore properties is a more beneficial solution . Nevertheless, limited scalability is still the greatest bottleneck for the practical application owing to the high-cost building units, inferior scalability, and inadequate integrity of POPs in membrane. , …”