High-speed shear-induced micro regenerated cellulose materials preparation: A promising solution for highly efficient and low pressure drop air filtration using agricultural waste

•All cellulose air filter achieves high FE and low air resistance.•High shear strategy contributes to form RC with high CrI and net structure.•Crystallinity and net structure are the key factors to improve air permeability.•All cellulose air filter can be naturally degraded and take part in carbon cycle.