Abstract
• Porous LAS/CNT composite is fabricated by gel-casting and CCVD method. • The gas filtration and wave absorption performance have been greatly improved. • The properties of the composites can be adjusted by changing the content of CNT. Inspired by the nostril structure of human, a multifunctional lithium aluminosilicate/CNT composite with nostril like structure has been developed for gas filtration and electromagnetic wave (EMW) absorption. The lithium aluminosilicate/CNT composites were fabricated by catalytic chemical vapor deposition (CCVD) method. Lithium aluminosilicate (LAS) ceramic with 3D pore structure work as the skeleton, in which carbon nanotubes (CNT) in situ grow evenly and form an electric conductive network. With the addition of CNT, the microwave absorption and gas filtration properties of the LAS/CNT composites have been improved remarkably compared with the LAS ceramic. The excellent multifunction benefits from the special nostril like structure. This work not only has an excellent application prospect in the field of EMW absorbing materials, but also has a great potential in the fields of gas filtration, catalyst carrier and so on. At the same time, it also proposes a new avenue for multifunctional microwave absorbing materials.
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