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Molecular Understanding and Design of Porous Polyurethane Hydrogels with Ultralow-Oil-Adhesion for Oil–Water Separation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-12-07 , DOI: 10.1021/acsami.0c18825 Jianjia Huang 1 , Zhenqiang Zhang 1 , Jiahao Weng 1 , Danfeng Yu 1 , Yueyan Liang 1 , Xiubin Xu 1 , Zhiwei Qiao 1, 2 , Ganwei Zhang 3 , Hui Yang 4 , Xu Wu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-12-07 , DOI: 10.1021/acsami.0c18825 Jianjia Huang 1 , Zhenqiang Zhang 1 , Jiahao Weng 1 , Danfeng Yu 1 , Yueyan Liang 1 , Xiubin Xu 1 , Zhiwei Qiao 1, 2 , Ganwei Zhang 3 , Hui Yang 4 , Xu Wu 1
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Materials with opposite affinities toward oil and water have been extensively used to coat porous substrates for oil–water separation, but the applications of these materials have been limited by the need for complex coating processes as well as the short-term adherence of these materials onto different substrates under extreme conditions. As reported herein, the robust porous polyurethane hydrogel has been theoretically and structurally designed with ultralow-oil-adhesion properties which is free stand without depending on additional substrates. The combination of superhydrophilic properties along with the underwater superoleophobic behavior of this porous hydrogel allows gravity driven separations of oil–water mixtures, and its antiadhesion performance toward oil prevents undesirable oily fouling. The underwater superoleophobic properties were also illustrated by molecular dynamics simulation to understand the resisting effect of hydrated layers. The as-prepared porous hydrogel shows ultrahigh oil–water separation efficiencies of 99.9% for various oil–water mixtures, ranging from those containing viscous oils (pump oil and peanut oil) to organic solvents (n-hexane, n-hexadecane, and toluene). In addition, this hydrogel is durable even with exposure to various harsh conditions including acidic and basic media (pH 0–14) as well as exposure to mechanical abrasion. We believe that the combination of facile preparation, substrate independence, gravity driven separation, antifouling properties, high durability, as well as the outstanding separation flux and efficiency of this robust porous hydrogel will help to advance the design and application of materials in oil–water separation fields.
中文翻译：
用于油水分离的超低油黏性多孔聚氨酯水凝胶的分子理解和设计
对油和水具有相反亲和力的材料已被广泛用于涂覆多孔基底以进行油水分离，但由于需要复杂的涂覆工艺以及这些材料在短期上的粘附性，这些材料的应用受到了限制。在极端条件下使用不同的基材。如本文所报道的，坚固的多孔聚氨酯水凝胶在理论上和结构上都具有超低油粘着性能，其自由放置而无需依赖于其他基材。该多孔水凝胶的超亲水性能与水下超疏油性能相结合，可实现重力驱动的油水混合物分离，并且其对油的抗粘附性能可防止不良的油垢。还通过分子动力学模拟说明了水下的超疏油性能，以了解水合层的抵抗作用。所制备的多孔水凝胶对各种油水混合物显示出超高的油水分离效率，达到99.9％，从含粘性油（泵油和花生油）到有机溶剂的混合物（Ñ己烷，Ñ十六烷，和甲苯）。此外，这种水凝胶即使在各种恶劣条件下（包括酸性和碱性介质（pH 0-14）以及机械磨损）也能持久耐用。我们相信，简便的制备方法，基质的独立性，重力驱动分离，防污性能，高耐用性以及这种坚固的多孔水凝胶的出色分离通量和效率的结合，将有助于推动油水材料的设计和应用分隔字段。
更新日期：2020-12-16
中文翻译：
用于油水分离的超低油黏性多孔聚氨酯水凝胶的分子理解和设计
对油和水具有相反亲和力的材料已被广泛用于涂覆多孔基底以进行油水分离，但由于需要复杂的涂覆工艺以及这些材料在短期上的粘附性，这些材料的应用受到了限制。在极端条件下使用不同的基材。如本文所报道的，坚固的多孔聚氨酯水凝胶在理论上和结构上都具有超低油粘着性能，其自由放置而无需依赖于其他基材。该多孔水凝胶的超亲水性能与水下超疏油性能相结合，可实现重力驱动的油水混合物分离，并且其对油的抗粘附性能可防止不良的油垢。还通过分子动力学模拟说明了水下的超疏油性能，以了解水合层的抵抗作用。所制备的多孔水凝胶对各种油水混合物显示出超高的油水分离效率，达到99.9％，从含粘性油（泵油和花生油）到有机溶剂的混合物（Ñ己烷，Ñ十六烷，和甲苯）。此外，这种水凝胶即使在各种恶劣条件下（包括酸性和碱性介质（pH 0-14）以及机械磨损）也能持久耐用。我们相信，简便的制备方法，基质的独立性，重力驱动分离，防污性能，高耐用性以及这种坚固的多孔水凝胶的出色分离通量和效率的结合，将有助于推动油水材料的设计和应用分隔字段。
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