Faculty of Materials and Energy, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
J Colloid Interface Sci. 2017 Nov 15;506:659-668. doi: 10.1016/j.jcis.2017.07.066. Epub 2017 Jul 18.
Oil leakages often cause fatal disasters for environmental pollution but an efficient treatment of the oil spills is still very challenging. Sponge-substrates with superhydrophobicity and superoleophilicity have been attracted much attention for oil/water separation. In this study, an inexpensive commercial melamine sponge was chemically modified for the uses of oil spills treatment by oil/water separation. Inspiring from the superhydrophobic property of lotus leaf, pyrrole was polymerized by a simple vapor-phase deposition to encapsulate the raw melamine-formaldehyde (MF) sponge. The as-formed thin polypyrrole walls were utilized as reducing reagent to generate Ag nanoparticles on the capsuled sponge. Accordingly, a superhydrophobic melamine sponge with a two-tier hierarchical structure was achieved after fluorination, and this material was applied to absorb oil from water. The absorption capacity, absorption rate and recyclability were investigated. This superhydrophobic sponge exhibited an efficient and fast oil/water separation performance in complicated environment and could be applied in industrial production because of its low cost and simple fabrication procedure. This study presents a facile strategy for the fabrication of efficient oil sorbents based on a two-tier hierarchical structure, providing a novel means for the upgrading of engineered sorption materials.
漏油事件经常对环境污染造成致命灾难，但有效的溢油处理仍然极具挑战性。具有超疏水和超亲油性的海绵基底因其在油水分离方面的应用而受到广泛关注。在这项研究中，通过化学改性，一种廉价的商业三聚氰胺海绵被用于溢油处理的油水分离。受荷叶超疏水性的启发，通过简单的气相沉积聚合吡咯，将原始的三聚氰胺-甲醛（MF）海绵进行包裹。形成的薄聚吡咯壁可用作还原剂，在包裹的海绵上生成 Ag 纳米颗粒。因此，经过氟化处理后，得到了具有双层分级结构的超疏水三聚氰胺海绵，并且该材料被用于从水中吸收油。研究了其吸油能力、吸油速率和可重复使用性。这种超疏水海绵在复杂环境中表现出高效、快速的油水分离性能，由于其成本低、制造工艺简单，可应用于工业生产。本研究提出了一种基于双层分级结构制备高效吸油剂的简便策略，为工程吸附材料的升级提供了一种新的途径。
