Mesoporous degradable chitosan-based monoliths: synthesis and applications toward water purification†

IF 3.2 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Molecular Systems Design & Engineering Pub Date : 2024-01-05 DOI:10.1039/D3ME00180F

Jyoti Devi Katiyar and Subrata Chattopadhyay

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Abstract

The sustainable synthesis of porous polymer monoliths has significant advantages over powdered porous polymers and is capable of adsorbing multiple types of pollutants efficiently from water. They are important as an easily affordable material for water purification. Herein, we report the synthesis of mesoporous chitosan, PEG monoliths, via the crosslinking of chitosan with PEG-diacrylate macro-crosslinkers using aza-Michael reactions in water. The surface area and pore volume are tuned by varying the crosslinking density and length of the macro-crosslinker. The materials show very good thermal and chemical stability against organic and aqueous (within pH 2–9) solvents. The monolith is capable of removing a wide range of both organic and inorganic pollutants, such as anionic dyes, metal ions, iodine, and pharmaceuticals, from contaminated water. The reusability of the monolith after it is regeneration by releasing the adsorbed pollutant is important for its affordable practical application. In addition, the monolith can be completely degraded in a strong alkaline solution to quantitatively recycle the chitosan derivative.

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介孔可降解壳聚糖基单片：合成与水净化应用

可持续合成的多孔聚合物单体（与粉末状多孔聚合物相比具有显著优势）能够有效吸附水中的多种污染物，是一种经济实惠的水净化材料，具有重要意义。在此，我们报告了在水中利用偶氮迈克尔反应将壳聚糖与 PEG-二丙烯酸酯大交联剂交联合成介孔壳聚糖-PEG 单体的过程。通过改变大交联剂的交联密度和长度，可以调节表面积和孔隙体积。这种材料对有机溶剂和水性溶剂（pH 值范围在 2-9 之间）具有很好的热稳定性和化学稳定性。这种整体材料能够从受污染的水中去除多种有机和无机污染物，如阴离子染料、金属离子、碘和药物。该整体石通过释放吸附的污染物实现再生后的可再利用性对于其经济实惠的实际应用非常重要。此外，该整体石可以在强碱性溶液中完全降解，从而定量回收壳聚糖衍生物。

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来源期刊

Molecular Systems Design & Engineering Engineering-Biomedical Engineering

CiteScore

6.40

自引率

2.80%

发文量

144

期刊介绍： Molecular Systems Design & Engineering provides a hub for cutting-edge research into how understanding of molecular properties, behaviour and interactions can be used to design and assemble better materials, systems, and processes to achieve specific functions. These may have applications of technological significance and help address global challenges.