Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions,Advanced Functional Materials

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Table Salt as a Template to Prepare Reusable Porous PVDF–MWCNT Foam for Separation of Immiscible Oils/Organic Solvents and Corrosive Aqueous Solutions
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-09-07 , DOI: 10.1002/adfm.201702926
Faze Chen _{1,

2} , Yao Lu ₃ , Xin Liu ₁ , Jinlong Song _{1,

4} , Guanjie He ₂ , Manish K. Tiwari ₃ , Claire J. Carmalt ₂ , Ivan P. Parkin ₂

Affiliation

Many advanced materials are designed for separation of immiscible oils/organic solvents and aqueous solutions, including poly(vinylidene fluoride) (PVDF)‐based materials with superwettability. However, due to the limited solubility of PVDF, techniques (e.g., phase inversion and electrospinning) often involve the use of toxic organic solvents. Here a facile organic solvent‐free method is described to prepare a porous PVDF–MWCNT (multiwalled carbon nanotube) foam using table salt as a sacrificial template. The porous PVDF–MWCNT foam is characterized as superhydrophobic–superoleophilic with good elasticity due to its 3D porosity and low surface energy. The foam exhibits high adsorption capacity to a variety of oils/organic solvents and can be easily reused by squeezing, heating, or releasing in other solvents. Moreover, the foam is highly resistant toward UV exposure, corrosive aqueous solutions such as acidic, alkaline, salty solutions, and turbulent environments, and shows effective oils/organic solvents removal in these complex environments. The continuous separation of immiscible oils/organic solvents and corrosive aqueous solutions with vacuum assistance is also presented. The organic solvent‐free and reusable PVDF–MWCNT foam is a promising candidate for large‐scale industrial separation of oils/organic solvents and water in corrosive and turbulent conditions.

中文翻译：

以食盐为模板制备可重复使用的多孔PVDF-MWCNT泡沫，以分离不混溶的油/有机溶剂和腐蚀性水溶液

许多先进的材料设计用于分离不混溶的油/有机溶剂和水溶液，包括具有超润湿性的聚偏二氟乙烯（PVDF）基材料。但是，由于PVDF的溶解度有限，因此技术（例如，相转化和静电纺丝）通常涉及使用有毒的有机溶剂。这里介绍了一种简便的无溶剂方法，该方法使用食盐作为牺牲模板来制备多孔PVDF-MWCNT（多壁碳纳米管）泡沫。PVDF-MWCNT多孔泡沫具有3D孔隙率和低表面能，具有良好的弹性，具有超疏水-超亲油的特征。泡沫对各种油/有机溶剂显示出高吸附能力，并且可以通过挤压，加热或在其他溶剂中释放而容易地重复使用。而且，泡沫对紫外线，腐蚀性水溶液（如酸性，碱性，盐溶液和湍流环境）具有很高的抵抗力，并且在这些复杂的环境中显示出有效的除油/有机溶剂能力。还提出了在真空辅助下连续分离不混溶的油/有机溶剂和腐蚀性水溶液的方法。不含有机溶剂且可重复使用的PVDF-MWCNT泡沫是在腐蚀性和湍流条件下大规模工业分离油/有机溶剂和水的有希望的候选者。还提出了在真空辅助下连续分离不混溶的油/有机溶剂和腐蚀性水溶液的方法。不含有机溶剂且可重复使用的PVDF-MWCNT泡沫是在腐蚀性和湍流条件下大规模工业分离油/有机溶剂和水的有希望的候选者。还提出了在真空辅助下连续分离不混溶的油/有机溶剂和腐蚀性水溶液的方法。不含有机溶剂且可重复使用的PVDF-MWCNT泡沫是在腐蚀性和湍流条件下大规模工业分离油/有机溶剂和水的有希望的候选者。

更新日期：2017-09-07

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