Enhanced oils and organic solvents absorption by polyurethane foams composites modified with MnO2 nanowires
Enhanced oils and organic solvents absorption by polyurethane foams composites modified with MnO2 nanowires
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DOI：
10.1016/j.cej.2016.08.085
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发表时间：
2017-02-01
影响因子：
15.1
通讯作者：
Pan, Jianming
中科院分区：
文献类型：
--
作者：
Zhang, Tao;Kong, Liying;Pan, Jianming
世界许多地区都出现了因石油泄漏和有机溶剂泄漏而引发的严重环境和生态问题。寻求适当的方法解决含油废水和有机溶剂污染已刻不容缓。针对这个问题，迫切需要一种能够有效、快速分离含油废水的多功能吸油材料。在这项工作中，我们报告了一种简便且廉价的方法来制造有效且可回收的吸油剂，即MnO2纳米线/聚氨酯（PU）泡沫复合材料，使用PU海绵作为多孔基材和MnO2纳米线作为改性剂。采用水热法合成MnO2纳米线，然后采用发泡技术制备MnO2纳米线/PU泡沫复合材料。为了增强疏水性和亲油性，使用硅烷偶联剂（KH 570）对MnO2纳米线的表面进行化学修饰。目前的MnO2纳米线/PU泡沫复合材料不仅可以有效地从水中分离油，而且还具有非常高的吸收能力，可以从水中去除高达其自身重量40.15倍的有机溶剂。更重要的是，所获得的MnO2纳米线/PU泡沫复合材料被证明具有优异的油可回收性和吸收剂再生性，使其成为多功能、综合性的吸收剂，可以满足各种实际含油废水和有机溶剂的分离要求。 (C) 2016 年由 Elsevier B.V. 出版
The severe environmental and ecological problems, derived from oil spills and organic solvents leakage, have occurred in many parts of the world. It is urgent to seek appropriate ways to resolve oily wastewater and organic solvent pollution. A versatile oil-absorbing material which can separate the oily wastewater effectively and quickly is in high demanded for this issue. In this work, we report a facile and inexpensive to fabricate an effective and recyclable oil-absorbent, namely MnO2 nanowires/polyurethane (PU) foam composites, using a PU sponge as a porous substrate and MnO2 nanowires as modifiers. The hydrothermal method is employed to synthesize MnO2 nanowires and then foaming technology is used to fabricate MnO2 nanowires/PU foam composites. In order to enhance the hydrophobic and oleophilic properties, the surfaces of MnO2 nanowires are chemically modified using silane coupling agent (KH 570). The present MnO2 nanowires/PU foam composites not only effectively separate oils from water as expected, but also possess a very high absorption capacity for the removal of organic-solvents from water up to 40.15 times its own weight. More importantly, the obtained MnO2 nanowires/PU foam composites is demonstrated to have excellent oil recoverability and absorbent regenerability, making them versatile and comprehensive absorbents to satisfy various practical oily wastewater and organic solvent separation requirements. (C) 2016 Published by Elsevier B.V.