PorogenZusätze

Porogenzusätze are substances added to a mixture to create pores. These pores, or voids, are intentionally introduced into a material to alter its properties. The term "porogen" itself derives from Greek words meaning "pore-maker." The primary function of a porogenzusatz is to leave behind a void structure after it is removed from the material. This removal is typically achieved through processes like thermal decomposition, evaporation, or leaching with a solvent.

The selection of a porogenzusatz depends heavily on the desired pore size, pore distribution, and the overall matrix material. Common examples of porogens include organic polymers, surfactants, salts, and even gases. For instance, in the creation of porous ceramics, organic compounds that burn out at high temperatures are often used as porogens. In the fabrication of certain types of membranes, soluble salts are leached out to create a porous network. The control over the porogen's concentration, particle size, and distribution within the precursor mixture directly influences the final porosity of the material. Porous materials find applications in a wide range of fields, including filtration, catalysis, insulation, and drug delivery systems, with porogenzusätze playing a critical role in their manufacture.