Affiliation:
1. Ministry of Education Key Laboratory of Advanced Textile Composite Materials Institute of Composite Materials, Tiangong University Tianjin China
2. School of Textile Science and Engineering Tiangong University Tianjin China
3. Collaborative Innovation Center of Textile and Garment Industry Zhongyuan University of Technology Zhengzhou China
Abstract
AbstractParticulate matter (PM) has a significant impact on air quality, especially the PM produced by automobile exhaust and high temperature environment. Therefore, it is of great significance to develop a technology that can effectively intercept fine PM under high temperature conditions. This study reports the construction of poly(m‐phenylene isophthalamide) (PMIA) nanofiber‐reinforced polyimide aerogel (PPNFAs) filters using freeze‐drying and electrospinning for high temperature filtration. After 100 compression cycles, the maximum compressive stress of PPNFAs is reduced by only 15%. When the content of PMIA is 0.65 wt%, PPNFAs has a high porosity (97.35%), high specific surface area (8.87 m2 g−1) and highest dust holding capacity (124.8 m2 g−1). After 15 days of continuous heating test at 300°C, the filtration efficiency of PPNFAs filter for different diameter particles of impurities remained above 98%. Therefore, the PPNFAs filter prepared in this study provides a new design concept for a new generation of high temperature filters.
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry