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首页> 外文期刊>RSC Advances >Superhydrophobic surfaces with fluorinated cellulose nanofiber assemblies for oil–water separation
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Superhydrophobic surfaces with fluorinated cellulose nanofiber assemblies for oil–water separation

机译：具有疏水性纤维素纳米纤维组件的超疏水表面，用于油水分离

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A Cellulose nanofiber (CNF) is an amazing nanomaterial produced from ubiquitous sources with outstanding mechanical, chemical, and barrier properties. This report describes facile functionalization of CNF with trichloro(1H,1H,2H,2H-heptadecafluorodecyl)silane (THFS). The paste form CNF was solvent exchanged from initial water to AK-225 (a mixture of 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropuropane) before surface modification with THFS. The modified CNFs were dispersed uniformly in AK-225. The CNF film, which was prepared using simple drop casting, showed a superhydrophobic surface with a water contact angle of 160° and oleophilicity with a hexane contact angle of less than 35°. The modified CNF assembly is thermally stable, optically transparent and resistant to corrosive environment (acidic, basic and seawater solutions). The separation of oil and water mixtures was demonstrated using steel mesh coated with modified CNF. Separation efficiency greater than 99% was achieved by simple gravitational force for hydrocarbons and organic solvents. The as-prepared mesh can be used repeatedly more than 50 times with the same efficiency as the initial state.
机译：纤维素纳米纤维（CNF）是一种惊人的纳米材料，由无处不在的材料制成，具有出色的机械，化学和阻隔性能。该报告描述了三氯（1 H ，1 H ，2 H ，2 H -七氟癸基）硅烷（THFS）。将糊状CNF从初始水中溶剂交换为AK-225（3,3-二氯-1,1,1,2,2-五氟丙烷和1,3-二氯-1,1,2,2的混合物，使用THFS进行表面改性之前，请先使用3-五氟环戊烷）。改性的CNF均匀地分散在AK-225中。使用简单的滴铸法制备的CNF膜显示出超疏水性表面，其水接触角为160°，亲油性为己烷接触角小于35°。改进的CNF组件具有热稳定性，光学透明性，并能抵抗腐蚀性环境（酸性，碱性和海水溶液）。使用涂有改性CNF的钢网证明了油和水混合物的分离。对于烃类和有机溶剂，通过简单的重力即可实现大于99％的分离效率。所准备的网格可以重复使用50次以上，并且效率与初始状态相同。

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