用于从寒冷水域回收油滴的蜡润湿海绵。
Wax-wetting sponges for oil droplets recovery from frigid waters.
作者信息
Cherukupally P, Sun W, Williams D R, Ozin G A, Bilton A M
机构信息
Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada.
Department of Chemical Engineering, Imperial College London, London, UK.
出版信息
Sci Adv. 2021 Mar 10;7(11). doi: 10.1126/sciadv.abc7926. Print 2021 Mar.
Energy-efficient recovery of oil droplets from ice-cold water, such as oil sands tailings, marine, and arctic oil spills, is challenging. In particular, due to paraffin wax crystallization at low temperatures, the crude oil exhibits high viscosity, making it difficult to collect using simple solutions like sponges. Here, we report a wax-wetting sponge designed by conforming to the thermoresponsive microstructure of crude oil droplets. To address paraffin wax crystallization, we designed the sponge by coating a polyester polyurethane substrate with nanosilicon functionalized with paraffin-like octadecyl ligands. The wax-wetting sponge can adsorb oil droplets from wastewater between 5° and 40°C with 90 to 99% removal efficacy for 10 cycles. Also, upon rinsing with heptol, the adsorbed oil is released within seconds. The proposed approach of sponges designed to conform with the temperature-dependent microstructure of the crude oils could enable cold water technologies and improve circular economy metrics in the oil industry.
从冰冷的水中高效回收油滴具有挑战性，比如油砂尾矿、海洋和北极地区的石油泄漏。特别是由于低温下石蜡结晶，原油呈现出高粘度，使得使用海绵等简单方法收集变得困难。在此，我们报告一种通过顺应原油滴的热响应微观结构设计的亲蜡海绵。为了解决石蜡结晶问题，我们通过用类似石蜡的十八烷基配体功能化的纳米硅涂覆聚酯聚氨酯基材来设计海绵。这种亲蜡海绵能够在5°至40°C之间从废水中吸附油滴，在10个循环中去除效率为90%至99%。此外，用庚醇冲洗后，吸附的油在几秒钟内即可释放。所提出的旨在顺应原油温度依赖性微观结构设计海绵的方法，可为冷水技术提供支持，并改善石油行业的循环经济指标。
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