Triptycene based microporous hypercrosslinked polymer with amino functionality for selective CO2 capture

IF 2.7 3区 化学 Q2 POLYMER SCIENCE
Mosim Ansari, Aasif Helal, Mahmoud Mohamed Abdelnaby, Abbas Saeed Hakeem, Mohd Yusuf Khan
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Abstract

The increasing CO2 concentration in the atmosphere contributes significantly to global warming, necessitating effective capture techniques. Though amine-based solvents are commonly used, they have drawbacks like high energy consumption and corrosion. Physical adsorption using microporous sorbents with polar groups emerges as a promising alternative, offering high efficiency and selectivity for CO2 capture. This work presents the design of a new microporous hypercrosslinked polymer with amino groups derived from the 3D molecular building block triptycene (TBMP-NH2), for CO2 capture applications. The triptycene unit in the polymer backbone provides high surface area, thermal stability, and microporosity. TBMP-NH2 demonstrates excellent thermal stability (Td > 350°C), considerable microporosity, and a high BET-specific surface area of 866 m2/g, making it a promising microporous adsorbent. It exhibits a high CO2 adsorption capacity of 1.86 mmol/g at 273 K and 1.23 mmol/g at 298 K, with a Qst value of 33.95 kJ/mol, indicating a physisorption mechanism where the micropore volume (Vmic = 0.359 cm3/g) plays a crucial role. TBMP-NH2 displays good CO2/N2 and CO2/CH4 selectivity, outperforming several reported porous polymers. Owing to its high physiochemical and thermal properties, and efficient and selective CO2 capture ability, TBMP-NH2 can be considered a promising material for CO2 capture and environmental remediation application.

Abstract Image

基于三叶草烯的微孔高交联聚合物,具有选择性CO2捕获的氨基功能
大气中二氧化碳浓度的增加是全球变暖的重要原因,因此需要有效的捕集技术。虽然胺基溶剂被广泛使用,但它们有高能耗和腐蚀等缺点。利用带极性基团的微孔吸附剂进行物理吸附是一种很有前途的选择,它提供了高效和选择性的CO2捕获。这项工作提出了一种新的微孔高交联聚合物的设计,其氨基来源于3D分子构建块三甲烯(TBMP-NH2),用于二氧化碳捕获应用。聚合物骨架中的三甲烯单元提供了高表面积、热稳定性和微孔隙度。TBMP-NH2表现出优异的热稳定性(Td >;350°C),相当大的微孔隙度,bet比表面积高达866 m2/g,使其成为一种很有前途的微孔吸附剂。在273 K和298 K下,其CO2吸附量分别为1.86 mmol/g和1.23 mmol/g, Qst值为33.95 kJ/mol,表明其物理吸附机制中微孔体积(Vmic = 0.359 cm3/g)起关键作用。TBMP-NH2表现出良好的CO2/N2和CO2/CH4选择性,优于几种已报道的多孔聚合物。TBMP-NH2具有良好的物理化学和热性能,以及高效和选择性的CO2捕集能力,是一种很有前景的CO2捕集和环境修复材料。
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来源期刊
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
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