“Mica/silicate glass frit‐armored skeleton” in PDMS composite foam for improving fire‐proofing performance

It remains challenging to give polydimethylsiloxane (PDMS) foam high fire‐proofing performance through scalable strategies and economical methods. Herein, a novel PDMS composite foam with good flame retardancy and simultaneously excellent thermal insulation performance and fire‐proofing properties under prolonged flame attack was developed through constructing “mica/silicate glass frit (SGF)‐armored skeleton” by one pot method. The prepared composite foams can resist above 1000°C flame without disintegration and still maintain excellent thermal insulation properties due to the formation of porous ceramic framework. The tensile strength and compressive strength at strain of 25% were also increased significantly by 265% and 221%, respectively. This strategy of constructing an inorganic filler‐armored skeleton structure in PDMS composite foam opens up new prospects to fabricate fire‐proofing PDMS composite foam with impressive high temperature resistance and good mechanical properties. A novel PDMS composite foam with good flame retardancy and simultaneously excellent thermal insulation performance and fire‐proofing properties was developed through constructing “mica/SGF‐armored skeleton” by one pot method.