当前位置: X-MOL 学术J. Mater. Chem. A › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Efficient removal of aerosol oil-mists using superoleophobic filters†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-21 00:00:00 , DOI: 10.1039/c7ta10045k
Xin Wei 1, 2, 3, 4 , Feng Chen 5, 6, 7, 8, 9 , Hongxia Wang 1, 2, 3, 4 , Hua Zhou 1, 2, 3, 4 , Zhongli Ji 5, 6, 7, 8, 9 , Tong Lin 1, 2, 3, 4
Affiliation  

Conventional filters for oil-mist filtration chiefly use fibrous materials, which have inadequate efficiency for small oil mists (e.g., size < 1 μm). Thicker filter mats are applied to increase filtration efficiency, but they not only consume more filter materials but also increase the energy cost due to increased air flow resistance. In this study, we have for the first time demonstrated a novel concept of improving the filtration efficiency for the separation of small oil mists from air without apparently increasing the air flow resistance. Using a commercial glass fibre filter as a model, we prepared a superoleophobic surface through a wet chemical coating method using a perfluoroalkyl acrylic copolymer as the material. The coating shows very little effect on the porous feature and air permeability of the fibrous filter. The superoleophobic treatment shows a considerable increase in the filtration efficiency. For the filter of thickness 1.12 mm, the filtration efficiency for small oil mists increases from 96.40% to 99.44%, whereas the pressure drop is increased by only 6% but the downstream oil mist content is reduced by 85%. For large oil-mists, the superoleophobic filter has almost 100% filtration efficiency with downstream mist subsided close to zero. A “bounce-collide-drain” mechanism was proposed to explain the improvement of the filtration performance. Such a novel concept may have great significance in the development of high efficiency, low energy consumption gas–liquid coalescing filters.

中文翻译:

使用超疏油过滤器有效去除气溶胶油雾

传统的油雾过滤器主要使用纤维材料,这些材料对小油雾的效率不高(例如,,尺寸<1μm)。使用了较厚的滤垫以提高过滤效率,但它们不仅消耗更多的滤料,而且由于增加的气流阻力而增加了能源成本。在这项研究中,我们首次展示了一种新颖的概念,可以提高从空气中分离小油雾的过滤效率,而不会明显增加空气流动阻力。使用市售的玻璃纤维过滤器作为模型,我们使用全氟烷基丙烯酸共聚物为材料,通过湿式化学涂覆方法制备了超疏油性表面。涂层对纤维过滤器的多孔性和透气性几乎没有影响。超疏油处理显示出过滤效率的显着提高。对于厚度为1.12毫米的过滤器,小油雾的过滤效率从96.40%增加到99.44%,而压降仅增加6%,但下游油雾含量减少了85%。对于大型油雾,超疏油过滤器的过滤效率几乎为100%,下游雾气消退接近于零。提出了“弹跳碰撞排放”机制来解释过滤性能的改善。这样一个新颖的概念可能对开发高效,低能耗的气液聚结过滤器具有重要意义。提出了“弹跳碰撞排放”机制来解释过滤性能的改善。这样一个新颖的概念可能对开发高效,低能耗的气液聚结过滤器具有重要意义。提出了“弹跳碰撞排放”机制来解释过滤性能的改善。这样一个新颖的概念可能对开发高效,低能耗的气液聚结过滤器具有重要意义。
更新日期:2017-12-21
down
wechat
bug