Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China.
Innovation Center for Textile Science and Technology , Donghua University , Shanghai 200051 , China.
ACS Appl Mater Interfaces. 2018 Nov 21;10(46):40274-40285. doi: 10.1021/acsami.8b14052. Epub 2018 Nov 7.
Severe environmental and ecological issues arising from frequent oil spill accidents have been great worldwide concerns. Considering the abruptness, complex condition, and long-term perniciousness of the spilled oil, the development of economic and versatile materials to quickly remove oil contaminants, especially for oil with high viscosity from a large water body, is of significant importance but remains a big challenge. Herein, we demonstrated a facile strategy to fabricate a versatile hierarchical structured sponge with superhydrophobicity and powerful oil capillarity via the in situ polymerization of a novel phenolic resin (polybenzoxazine) composite open-cell sponges. The tunable hierarchical structures of the as-prepared sponge significantly improved its water repellence and oil capillarity; meanwhile, a plausible mechanism is also proposed. With the merits of high porosity, excellent water repellence, enhanced oil capillarity, and robust mechanical stability, the obtained sponge exhibited an intriguing oil spill cleanup performance with fast oil absorption speed, good recyclability, and high absorption capacity. Besides that, the modified sponge could also be utilized for the separation of oil/water mixture with individual phase and the surfactant-stabilized emulsion solely under the drive of gravity. The robust oil/water separation performance, low cost, and facile synthesis strategy make the resultant sponges a competitive material for the large-scale oil spill emergency remediation.
频繁的溢油事故所引发的严重环境和生态问题引起了全世界的广泛关注。考虑到溢油的突发性、复杂性和长期性，开发经济、多功能的材料来快速去除油类污染物，特别是从大水体中去除高粘度的油类，具有重要意义，但仍然是一个巨大的挑战。在这里，我们通过一种新型酚醛树脂（聚苯并恶嗪）复合开孔海绵的原位聚合，展示了一种制造具有超疏水性和强大吸油性的多功能分级结构海绵的简便策略。所制备的海绵具有可调谐的分层结构，显著提高了其疏水性和吸油性；同时，还提出了一种合理的机制。由于具有高孔隙率、优异的疏水性、增强的吸油性和稳健的机械稳定性，所得到的海绵表现出了令人瞩目的吸油性能，具有快速吸油速度、良好的可回收性和高吸油能力。此外，改性后的海绵还可以在重力作用下单独用于分离单相油/水混合物和表面活性剂稳定的乳液。强大的油水分离性能、低成本和简便的合成策略使所得海绵成为大规模溢油应急修复的一种有竞争力的材料。
