Paper‐based Functional Materials for Filtration and Separation

This chapter explores the development, preparation, and applications of paper-based functional materials for filtration and separation. It discusses various fiber types, such as PTFE, PAN, aramid, and glass fibers, highlighting their unique properties and roles in enhancing filtration performance. The preparation methods, including wet-laid nonwoven fabric processing and composite technologies, are detailed, emphasizing their impact on material structure and efficiency. Key applications span automotive filtration, high-efficiency air filters, water treatment, battery separators, and face masks, showcasing the versatility and advancements in this field. This chapter also addresses challenges and future trends, such as improving filtration efficiency and material durability, to meet growing industrial and environmental demands.