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Renewable, Biomass-Derived, Honeycomblike Aerogel As a Robust Oil Absorbent with Two-Way Reusability
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2017-09-29 00:00:00 , DOI: 10.1021/acssuschemeng.7b02333
Jingxian Jiang 1 , Qinghua Zhang 1 , Xiaoli Zhan 1 , Fengqiu Chen 1
Affiliation  

The disposal of oily wastewater has attracted extensive attention worldwide these days. Emerging environmentally friendly materials with large capacity and high selectivity that can effectively absorb oil and organic solvents from water or realize oil/water separation are in high demand. Herein, we demonstrated the facile fabrication of a sustainable, ecofriendly, biomass-derived, honeycomblike aerogel, taking lignin, agarose, and poly(vinyl alcohol) (PVA) as basic ingredients. The aerogel possessed porous three-dimensional (3D) cellular structure with tunable low density (ρ < 0.052 g cm–3) and featured good flexibility and compressibility. The modified aerogel, which was able to achieve switching from the absorption of oil and organic solvents to desorption just by altering the medium pH, was obtained simply through immersing the original aerogel into a solution of the synthesized copolymer containing pH-responsive component poly(2-(dimethylamino)ethyl methacrylate) (pDMAEMA). The absorption capacity of the modified aerogel for oil and organic solvents was in the range of 20–40 times its own weight, which was also adjustable via controlling the concentration of starting materials. The reusability of the modified aerogel could be carried out by both manual squeezing and pH-induced desorption, further broadening its application fields. The successful design of the biomass-derived modified aerogel with two-way reusability could provide new thoughts for the design of multifunctional oil absorbents, also giving efficient and sustainable options for water treatment and environmental protection.

中文翻译:

可再生,生物质衍生的蜂窝状气凝胶,具有双向可重复使用性,是一种坚固的吸油剂

如今,含油废水的处理已引起全世界的广泛关注。对新兴的具有高容量和高选择性的环保材料提出了要求,这些材料可以有效地吸收水中的油和有机溶剂或实现油/水分离。本文中,我们展示了以木质素,琼脂糖和聚乙烯醇(PVA)为基本成分的,可持续的,生态友好的,生物质衍生的,蜂窝状气凝胶的制造工艺。气凝胶具有多孔的三维(3D)细胞结构,具有低密度可调(ρ<0.052 g cm –3),并具有良好的柔韧性和可压缩性。只需通过将原始气凝胶浸入含有pH响应组分poly(2)的合成共聚物溶液中即可获得改性的气凝胶,仅通过改变介质的pH值即可实现从吸收油和有机溶剂到脱附的转换。 -(甲基丙烯酸二甲氨基)乙酯)(pDMAEMA)。改性气凝胶对油和有机溶剂的吸收能力在其自身重量的20–40倍之间,这也可以通过控制原料的浓度来调节。改性气凝胶的可重复使用性可以通过手动挤压和pH诱导的脱附来实现,从而进一步拓宽了其应用领域。
更新日期:2017-09-29
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