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Bioinspired Ant-Nest-Like Hierarchical Porous Material Using CaCl2 as Additive for Smart Indoor Humidity Control
journal contribution
posted on 2019-04-02, 17:46 authored by Xiaopeng Liu, Zhang Chen, Guang Yang, Yanfeng GaoInspired
by the functional microstructure of the ant nest, a humidity
control material was prepared by the sintering of modified low-grade
sepiolite. A hierarchical porous structure accelerates the diffusion
of water vapor. Meanwhile, CaCl2 was applied subtly to
enhance absorption/desorption of water vapor in response to the change
of air relative humidity. The water vapor adsorption–desorption
content reaches 550 g·m–2 with a steady performance
after 10 cycles. The flexural strength of the specimen is excessive,
10 MPa. Furthermore, two model houses were used to evaluate the performance
of the material in a real environment. The result indicated that it
could narrow indoor humidity fluctuation by more than 10% RH spontaneously
and mainly maintained the humidity within a healthy range (RH 40–70%)
without energy consumption. This invention makes it possible for large-scale
fabrication of this material in terms of wall bricks for smart indoor
humidity control.