Polyimide/polyurethane aerogel film air filtering material as well as preparation and application thereof

• Main Authors: SHEN XIAODONG, LIU SIJIA, NIE YIHAO, ZHAO XINFU, YUAN ZHIPENG, YU SHIMO, YI XIBIN, ZHANG JING
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The invention belongs to the field of preparation of air filtering materials, relates to a polyimide/polyurethane aerogel film air filtering material as well as preparation and application thereof, and particularly discloses a PI/TPU aerogel film with mesopores and macropores in a certain proportion, which is obtained by introducing polyurethane (TPU) to adjust a pore structure during preparation of PI aerogel. The filter material has the advantages of high filter efficiency, low piezoresistance and high quality factor, is relatively simple to prepare, and has a good industrial prospect. 本发明属于空气过滤材料制备领域，涉及一种聚酰亚胺/聚氨酯气凝胶薄膜空气过滤材料及其制备与应用，具体公开了在制备PI气凝胶时引入聚氨酯(TPU)来调节孔结构，得到介孔与大孔成一定比例的PI/TPU气凝胶薄膜，与现有的空气过滤材料相比，其过滤效率高的同时还具有较低的压阻，满足过滤材料的品质因子高的特点，制备相对简单，有良好的工业化前景。