公开(公告)号：US20220243022A1

公开(公告)日：2022-08-04

申请号：US17622358

申请日：2020-08-04

Applicant: Agency for Science, Technology and Research

Inventor： Hong YAN ,  Kui YAO ,  Shuting CHEN ,  Poh Chong LIM

IPC: C08J9/00 ,  C08J9/06 ,  C08J9/12 ,  E04B1/84 ,  G10K11/162

Abstract: A porous composite material (50) for sound absorption and a method (10) of producing the porous composite material (50) are provided. The method (10) includes preparing (12) a mixture of mechano-electrical conversion elements (56) and electro-thermal conversion elements (58) in an organic solvent. The mixture of the mechano-electrical conversion elements (56) and the electro-thermal conversion elements (58) in the organic solvent is mixed (14) with an aqueous solvent to precipitate a piezoelectric hybrid filler material (54). The piezoelectric hybrid filler material (54) is mixed (16) with a precursor. A foaming operation is performed (18) with the precursor to produce the porous composite material (50).