Biomimetic Design and Mass Production of Sustainable Multiscale Cellulose Fibers‐Based Hierarchical Filter Materials for Protective Clothing
Qing‐Fang Guan, Zi‐Meng Han, Huai‐Bin Yang, Kunpeng Yang, Zhang‐Chi Ling, Chong‐Han Yin, Yuxiang Zhao, Jinlong Wang, Beibei Yan, Tao Ma, Bicheng Hu, Chao Li, Xiaofeng Pan, Siming Chen, Si‐Yue Ma, Shu‐Hong Yu
Abstract
Abstract As a core part of personal protective equipment (PPE), filter materials play a key role in individual protection, especially in the fight against the COVID‐19. Here, a high‐performance multiscale cellulose fibers‐based filter material is introduced for protective clothing, which overcomes the limitation of mutual exclusion of filtration and permeability in cellulose‐based filter materials. With the hierarchical biomimetic structure design and the active surface of multiscale cellulose fibers, high PM 2.5 removal efficiency of ≈92% is achieved with the high moisture transmission rate of 8 kg m −2 d −1 . Through a simple and effective dip‐coating and roll‐to‐roll process, the hierarchical filter materials can be made on a large scale and further fabricated into high‐quality protective clothing by industrial production equipment.