Mussel Adhesive-Inspired Design of Superhydrophobic Nanofibrillated Cellulose Aerogels for Oil/Water Separation,ACS Sustainable Chemistry & Engineering

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Mussel Adhesive-Inspired Design of Superhydrophobic Nanofibrillated Cellulose Aerogels for Oil/Water Separation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-06-05 00:00:00 , DOI: 10.1021/acssuschemeng.8b01397
Runan Gao ₁ , Shaoliang Xiao ₁ , Wentao Gan ₁ , Qi Liu ₂ , Hassan Amer ₃ , Thomas Rosenau ₃ , Jian Li ₁ , Yun Lu _{1,

3,

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Affiliation

Inspiration from biomimetics—the chemistry of mussel adhesives—was taken for imparting superhydrophobic properties to nanofibrillated cellulose (NFC) matrices. A polydopamine (PDA) surface coating was introduced, acting as an anchor between the NFC scaffold and octadecylamine (ODA): PDA is coated onto the NFC scaffolds by its adhesive properties and the ODA is successfully attached to the PDA by a Schiff base reaction. The ultralow density of 6.04 mg/cm³ combined with the high contact angle of 152.5° endows the composite aerogel with superb buoyancy and excellent oil/water separation selectivity. Oil can be rapidly absorbed from a mixture of oil and water. In addition, the modified aerogel can take up a wide range of organic solvents, with the maximum absorption capacity reaching up to 176 g/g, depending on the density of the liquids. The novel superhydrophobic aerogel shows great potential as an adsorber for oil and solvent spills and as an oil–water separator.

中文翻译：

贻贝粘合剂启发的超疏水纳米原纤化纤维素气凝胶用于油/水分离的设计

仿生粘合剂（贻贝胶的化学原理）的灵感来自于赋予纳米原纤化纤维素（NFC）基质超疏水性。引入了聚多巴胺（PDA）表面涂层，作为NFC支架和十八烷基胺（ODA）之间的锚点：通过PDA的粘合特性将PDA涂覆在NFC支架上，并且通过Schiff碱反应将ODA成功地附着到PDA上。6.04 mg / cm ³的超低密度结合152.5°的高接触角，该复合气凝胶具有出色的浮力和出色的油/水分离选择性。可以从油和水的混合物中迅速吸收油。此外，改性气凝胶可吸收各种有机溶剂，根据液体的密度，最大吸收容量可达到176 g / g。新型的超疏水气凝胶具有巨大的潜力，可以用作溢油和溶剂溢流的吸附剂以及用作油水分离器。

更新日期：2018-06-05

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