Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers,Industrial & Engineering Chemistry Research

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Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-10-19 , DOI: 10.1021/acs.iecr.0c04399
Lizhi Wang ₁ , Gui Chen ₂ , Qin Xiao ₁ , Du Zhang ₁ , Yafei Sang ₁ , Jianhan Huang ₁

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Multifunctional porous organic polymers (POPs) are excellent porous materials for CO₂ capture and Hg²⁺ adsorption. Especially, plentiful ultramicropores (d < 0.7 nm) and a high nitrogen (N) content are beneficial for CO₂ capture, and the micropores and the specific functional groups are helpful for Hg²⁺ adsorption, while the facile construction of the multifunctional POPs still remains a challenge. Herein, a series of bifunctional POPs was simply fabricated from the ketone-based polymers on the basis of the postfunctionalization. Because of their low Brunauer–Emmett–Teller (BET) surface area (S_BET) and pore volume (V_total), the polymers were further carried out the Schiff-based reaction using melamine (MA) as the postmodifier. As the rigid external cross-linker, MA embedded in the pores of the polymers and supported the skeleton of the polymers. The resulting polymers showed a sharp increase of the S_BET (up to 703 m²/g) and V_total (up to 0.657 cm³/g), high N content (up to 36.95 wt %), and three-dimensional hierarchical porosity. In particular, the high ultramicropore volume (up to 0.199 cm³/g) of the resulting polymers made them effective for CO₂ capture (193 mg/g; 273 K and 1 bar). The high micropore volume (up to 0.272 cm³/g) and abundant N (up to 36.95 wt %) offered them high Hg²⁺ capacity (425 mg/g at 298 K). This facile postfunctionalization strategy is potentially useful for the fabrication of some other multifunctional POPs.

中文翻译：

基于酮基聚合物的后官能化的双功能多孔有机聚合物

多功能多孔有机聚合物（POP）是用于CO ₂捕获和Hg ²⁺吸附的出色多孔材料。尤其是，大量的超微孔（d <0.7 nm）和高的氮（N）含量有利于CO ₂捕获，并且微孔和特定的官能团有助于Hg ^2+的吸附，而多功能POPs的简便构建仍仍然是一个挑战。在此，在后官能化的基础上，由酮类聚合物简单地制备了一系列双功能的POP。由于它们的Brunauer-Emmett-Teller（BET）表面积（S _BET）和孔体积（V _total），使用三聚氰胺（MA）作为后改性剂，使聚合物进一步进行基于席夫的反应。作为刚性的外部交联剂，MA嵌入聚合物的孔中并支撑聚合物的骨架。所得聚合物显示出S _BET（最高703 m ² / g）和V _total（最高0.657 cm ³ / g）的急剧增加，高N含量（最高36.95 wt％）和三维分级孔隙率。特别地，所得聚合物的高超微孔体积（高达0.199cm ³ / g）使得它们对于CO ₂捕集有效（193mg / g； 273K和1bar）。高微孔体积（最大0.272 cm ³/ g）和丰富的N（高达36.95 wt％）为它们提供了高Hg ²⁺容量（在298 K下为425 mg / g）。这种简便的后功能化策略可能对某些其他多功能POP的制造有用。

更新日期：2020-10-29

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