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Material transporting applications, such as filtration, absorption, venting, wicking and diffusion, are

very important in modern industry. The transporting media are usually porous structures

manufactured with powder, fibers, and foam materials. Sintering is the most common process to

produce transporting media with powder, where the powder particles are heated or compressed to

form a solid mass of porous material without melted to the point of liquefaction. The resulting porous

materials have isotropic and uniform interconnecting pores. The process also offers a unique

combination of functionality and structural strength. However, the sintering process can only be

implemented by molding methods. As a result, the boundary geometry is limited. In addition, multiporosity

in one object is not possible.

A method of tuning material transporting properties with multi-phase internal structures is proposed.

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