What are the natural porous materials

Solid containing a certain number of holes is called porous material, the boundary or surface of the holes by the pillars or flat plate, porous materials are commonly found in nature such as wood, cork, sponges and coral.

In accordance with the different size of the pore, porous materials can be divided into microporous (pore size less than 2 nm) materials, mesoporous (pore size 2-50 nm) materials and macroporous (pore size greater than 50 nm) materials, porous materials generally have a low relative density, high specific strength, high specific surface area, light weight, sound insulation, thermal insulation, permeability and other advantages of its wide range of uses can be used for the smallest to everywhere you can see the Coffee cups can be used everywhere, as large as the airplane cabin shock pads, the development of modern technology makes the metal, ceramics, glass and other materials can also be foamed like polymers. These new foam materials are gradually being used as insulation, cushioning, impact energy absorption materials, thus giving play to its unique comprehensive performance determined by the porous structure.