Mussel Adhesive-Inspired Design of Superhydrophobic Nanofibrillated Cellulose Aerogels for Oil/Water Separation
Mussel Adhesive-Inspired Design of Superhydrophobic Nanofibrillated Cellulose Aerogels for Oil/Water Separation
复制标题
用于油/水分离的超疏水纳米原纤化纤维素气凝胶的受贻贝粘合剂启发的设计
DOI：
10.1021/acssuschemeng.8b01397
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发表时间：
2018-07-01
影响因子：
8.4
通讯作者：
Lu, Yun
中科院分区：
文献类型：
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作者：
Gao, Runan;Xiao, Shaoliang;Lu, Yun
灵感来自仿生学的化学贻贝胶粘剂，被赋予超疏水性能的纳米原纤化纤维素（NFC）矩阵。引入聚多巴胺（PDA）表面涂层，其充当NFC支架和十八胺（ODA）之间的锚：PDA通过其粘合性质被涂覆到NFC支架上，并且ODA通过席夫碱反应成功地附着到PDA上。6.04 mg/cm（3）的超低密度与152.5度的高接触角相结合，赋予复合气凝胶极好的浮力和优异的油/水分离选择性。油可以从油和水的混合物中迅速吸收。此外，改性气凝胶可以吸收各种有机溶剂，根据液体的密度，最大吸收能力可达176 g/g。新型超疏水气凝胶作为油和溶剂泄漏的吸附剂和作为油-水分离器显示出巨大的潜力。
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/cm(3) combined with the high contact angle of 152.5 degrees 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.