Underwater Superoleophobic and Salt-Tolerant Sodium Alginate/N-Succinyl Chitosan Composite Aerogel for Highly Efficient Oil–Water Separation,ACS Applied Polymer Materials

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Underwater Superoleophobic and Salt-Tolerant Sodium Alginate/N-Succinyl Chitosan Composite Aerogel for Highly Efficient Oil–Water Separation
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-02-13 , DOI: 10.1021/acsapm.9b00908
Cheng Wang ₁ , Guanghua He ₁ , Jilong Cao ₁ , Lihong Fan ₁ , Weiquan Cai ₂ , Yihua Yin ₁

Affiliation

Materials for oil–water separation under harsh conditions that exhibit high separation efficiency, salt tolerance, and the capability of high-speed separation and reusability are in great demand. In this study, we introduce a series of sodium alginate (SA)/N-succinyl chitosan (NSCS) composite aerogels with outstanding mechanical strength, robust salt tolerance, and high oil–water separation efficiency. These aerogels were well designed and prepared through a combination of a freeze-drying method, ionic cross-linking, and chemical cross-linking. Due to their remarkable mechanical performance and good flexibility, the composite aerogels could achieve oil–water separation under various harsh conditions. The separation efficiency reached 99% owing to the outstanding underwater superoleophobicity and high-porosity structure of the aerogel. More importantly, the aerogels could preserve their high separation efficiency and underwater superoleophobicity after being soaked in a saturated NaCl solution for 30 days or after 30 separation cycles, which suggested their favorable stability under high-salinity conditions. These results indicated that SA/NSCS aerogels were qualified materials for oil–water separation, which gives us hope for their application in oil–water separation under harsh conditions.

中文翻译：

水下超疏油耐盐藻酸钠/ N-琥珀酰壳聚糖复合气凝胶，可高效分离油水

迫切需要在苛刻条件下用于油水分离的材料，这些材料具有很高的分离效率，耐盐性以及高速分离和可重复使用的能力。在这项研究中，我们介绍了一系列海藻酸钠（SA）/ N-琥珀酰壳聚糖（NSCS）复合气凝胶，具有出色的机械强度，强大的耐盐性和较高的油水分离效率。这些气凝胶经过精心设计并通过冷冻干燥法，离子交联和化学交联的组合制备。由于其卓越的机械性能和良好的柔韧性，复合气凝胶可以在各种恶劣条件下实现油水分离。由于出色的水下超疏油性和气凝胶的高孔隙率结构，分离效率达到了99％。更重要的是，将气凝胶浸泡在饱和的NaCl溶液中30天或30个分离周期后，可以保持其高分离效率和水下超疏油性，这表明它们在高盐度条件下具有良好的稳定性。这些结果表明，SA / NSCS气凝胶是用于油水分离的合格材料，这使我们对其在恶劣条件下的油水分离中的应用充满希望。

更新日期：2020-02-13

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