Eco-friendly hierarchical porous palygorskite/wood fiber aerogels with smart indoor humidity control

Advocating low-carbon has become the consensus of all countries in the world and a necessary means of sustainable development. Humidity-control materials (HCMs) can smartly regulate indoor air humidity without energy consumption, thereby greatly reducing building energy consumption. However, the preparation process of traditional HCMs involved toxic or corrosive substances, which was not eco-friendly. In this work, monolithic humidity-control palygorskite/wood fiber composite aerogel materials (PalOH/WF-HCAMs) with hierarchical porous were prepared by freeze-drying method. The composite aerogels had low densities (