微粒
过滤(数学)
多孔性
压力降
多孔介质
化学工程
材料科学
陶瓷
纳米技术
化学
复合材料
工程类
物理
有机化学
数学
统计
热力学
作者
Jingjing Liu,Bo Ren,Yali Wang,Yuju Lu,Lu Wang,Yugu Chen,Jinlong Yang,Yong Huang
标识
DOI:10.1016/j.cej.2019.01.065
摘要
Porous ceramics with high porosity and extensive interconnected pores have great application potential in fields ranging from dye removal to high-temperature particulate matter (PM) capture. However, constructing these materials to achieve efficient filtration is extremely challenging. Herein, a novel strategy to create hierarchical-structured porous alumina ceramics (PACs) with three-dimensional (3D) reticular architecture is reported based on polyurethane (PU) foaming method. To ensure the efficient flow-through filtration, carbamate-grafted carbon black is used as the pore-forming agent and assembled into the porous PU framework. Submicron and micron-sized pores on the cell walls are observed in hierarchical-structured PACs. This unique structure enables a high PM removal efficiency (94.1%) at an ultralow pressure drop (20 Pa). Our work has demonstrated great application potentials of as-prepared PACs as an efficient high-temperature PM filter and provided new insights to develop highly effective filter.
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