可调官能团多孔超交联聚合物对水中盐酸多西环素的吸附行为及机理,Journal of Applied Polymer Science

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可调官能团多孔超交联聚合物对水中盐酸多西环素的吸附行为及机理
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-11-01 , DOI: 10.1002/app.54818
Yingjie Guo ₁ , Zan Chen ₂ , Xue Hu ₁ , Yawei Du ₁ , Cuijia Duan ₂ , Claudia Li ₃ , Sibudjing Kawi ₃ , Yinhui Li _{1,

3}

Affiliation

通过交联和Friedel-Crafts反应合成了亚氨基超交联聚合物（NH-HCPs）、氨基超交联聚合物（NH ₂ -HCPs）和羧基超交联聚合物（COOH-HCPs），作为盐酸多西环素（DOX）的高效吸附剂）在水里。这些聚合物NH-HCP、NH ₂ -HCP和COOH-HCP的比表面积分别为450、267.576和94.39 m ² /g。DOX在这些聚合物上的吸附动力学符合准二级模型，而吸附等温线分别遵循Langmuir模型（NH-HCPs）和Freundlich模型（NH ₂ -HCPs和COOH-HCPs）。_{NH-HCPs、NH 2} -HCPs和COOH-HCPs的最大DOX吸附容量分别为166.82、132.43和72.07 mg/g。模拟结果表明，COOH-HCPs 由于其表面大量存在氧和氮基团而表现出最强的吸附能力，能够与 DOX 形成氢键。然而，其实际吸附容量是聚合物中最低的，这表明与功能调整相比，结构调整对提高吸附性能的作用更为显着。_{用NH-HCP和NH 2} -HCP进行的吸附实验进一步支持了这一假设。_{NH-HCPs、NH 2} -HCPs 和 COOH-HCPs的主要 DOX 吸附机制涉及氧和氮官能团的 H 键合，以及其他机制，如 π-π 共轭效应、孔填充效应、静电相互作用和酸碱相互作用。_{总体而言，本研究证明了 NH-HCP、NH 2} -HCP 和 COOH-HCP 在去除水中 DOX方面的有效性，强调了结构调整对吸附性能的显着影响。

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Adsorption behaviors and mechanisms of porous hypercrosslinked polymers with adjustable functional groups toward doxycycline hydrochloride from water

Imino hypercrosslinked polymers (NH-HCPs), amino hypercrosslinked polymers (NH₂-HCPs), and carboxyl hypercrosslinked polymers (COOH-HCPs) were synthesized through cross-linking and Friedel-Crafts reactions to serve as highly efficient adsorbents for doxycycline hydrochloride (DOX) in water. These polymers, NH-HCPs, NH₂-HCPs, and COOH-HCPs, exhibited specific surface areas measuring 450, 267.576, and 94.39 m²/g, respectively. The adsorption kinetics of DOX onto these polymers were consistent with the pseudo-second-order model, while the adsorption isotherms followed the Langmuir model (NH-HCPs) and Freundlich model (NH₂-HCPs and COOH-HCPs), respectively. The maximum DOX adsorption capacities for NH-HCPs, NH₂-HCPs, and COOH-HCPs were 166.82, 132.43, and 72.07 mg/g, respectively. Simulation results indicated that COOH-HCPs exhibited the strongest adsorption capability due to a substantial presence of oxygen and nitrogen groups on its surface, enabling the formation of hydrogen bonds with DOX. However, its actual adsorption capacity was the lowest among the polymers, indicating that structural adjustments played a more significant role in improving adsorption performance compared to functional adjustments. Adsorption experiments conducted with NH-HCPs and NH₂-HCPs further supported this hypothesis. The primary DOX adsorption mechanism of NH-HCPs, NH₂-HCPs, and COOH-HCPs involved the H-bonding of oxygen and nitrogen functional groups, along with other mechanisms such as π-π conjugated effects, pore-filling effects, electrostatic interactions, and acid–base interactions. Overall, this study demonstrates the effectiveness of NH-HCPs, NH₂-HCPs, and COOH-HCPs in DOX removal from water, highlighting the significant influence of structural adjustments on adsorption performance.

更新日期：2023-11-01

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