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Superhydrophobic three-dimensional porous ethyl cellulose absorbent with micro/nano-scale hierarchical structures for highly efficient removal of oily contaminants from water
Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2018-03-12 , DOI: 10.1016/j.carbpol.2018.03.018
Yeqiang Lu , Weizhong Yuan

The development of efficient absorbent materials is of global importance for oil spillage cleanup and environmental protection. In this work, a novel superhydrophobic micro/nano-scale hierarchical structured ethyl cellulose sponge was successfully fabricated via an eco-friendly salt-templating method followed by immobilizing silver nanoparticles on the surface and subsequent modification with long-chain alkanethiols. The as-prepared sponge with unique micro-nano structure and porous interconnected network exhibited low density (<17 kg m−3), high porosity (>98%) and robust superhydrophobicity (θwater = 161.3°, θoil = 0°, sliding angle = 3.6°). The sponge could collect a wide range of organic solvents and oils with absorption capacity of 36 to 48 times of its own weight. Furthermore, the absorption capacity decreased slightly to 89.8% of its initial value after 50 cycles, demonstrating excellent recyclability of the sponge. It was believed that the superhydrophobic/superoleophilic sponge would be a promising absorbent material for the selective oil removal and recovery in environmental remediation.



中文翻译:

具有微米/纳米级分级结构的超疏水三维多孔乙基纤维素吸收剂,可高效去除水中的油性污染物

高效吸收材料的开发对于溢油清理和环境保护具有全球重要性。在这项工作中,通过生态友好的盐模板方法成功地制造了一种新型的超疏水性微米/纳米级分级结构乙基纤维素海绵,随后将银纳米颗粒固定在表面上,随后用长链链烷硫醇进行了修饰。所制备的具有独特的微纳米结构和多孔互连网络的海绵具有低密度(<17 kg m -3),高孔隙率(> 98%)和强大的超疏水性(θ = 161.3°,θ油) = 0°,滑动角度= 3.6°)。海绵可以收集各种有机溶剂和油,吸收能力是其自重的36至48倍。此外,在50个循环之后,吸收能力略微下降至其初始值的89.8%,这表明海绵具有优异的可回收性。据信,超疏水/超亲油海绵将是用于环境修复中选择性除油和回收的有前途的吸收材料。

更新日期:2018-03-13
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