Jia Chao, Liu Yibo, Li Lei, Song Jianan, Wang Haiyang, Liu Zhenglian, Li Ziwei, Li Bo, Fang Minghao, Wu Hui
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
Nano Lett. 2020 Jul 8;20(7):4993-5000. doi: 10.1021/acs.nanolett.0c01107. Epub 2020 Jun 4.
Advanced filter materials with high efficiency, low-pressure drop, and high-temperature resistance are urgently needed in the field of high-temperature gas filtration. Here, an AlO-stabilized ZrO (ASZ) submicron fiber air filter paper with excellent flexibility and thermal stability (up to 1100 °C) is developed using a cost-effective, scalable solution blow spinning method and subsequent calcination. The ASZ papers demonstrate excellent flexibility and foldability, which can be attributed to the tetragonal phase and small crystallite size of the ASZ fibers due to the presence of AlO. In addition, the ASZ papers with an areal density of 56 mg cm show a high filtration efficiency (99.56%) and a low-pressure drop (108 Pa) for 15-615 nm NaCl particles at an airflow velocity of 5.4 cm s. We envision that the foldable all-ceramic air filter material will provide a solution for the removal of particulate matter from the high-temperature exhaust gases.
高温气体过滤领域迫切需要具有高效、低压降和耐高温性能的先进过滤材料。在此，采用具有成本效益的可扩展溶液吹纺法及后续煅烧工艺，制备出了具有出色柔韧性和热稳定性（高达1100°C）的AlO稳定ZrO（ASZ）亚微米纤维空气滤纸。ASZ滤纸表现出优异的柔韧性和可折叠性，这可归因于AlO的存在使ASZ纤维具有四方相和小晶粒尺寸。此外，面密度为56 mg/cm²的ASZ滤纸在气流速度为5.4 cm/s时，对15 - 615 nm的NaCl颗粒显示出高过滤效率（99.56%）和低压降（108 Pa）。我们设想这种可折叠的全陶瓷空气过滤材料将为从高温废气中去除颗粒物提供一种解决方案。
