In freeze casting, the solidification of the solvent induces a physical separation of nanocellulose from the suspending medium. Crystals of the frozen solvent serve as sacrificing templates, allowing physical or chemical crosslinking of nanocellulose around the crystals. The frozen crystals are then removed by freeze-drying, revealing scaffolds of nanoparticle networks with an interconnected porous structure . Three freezing modes were tested: one-step low temperature freezing at -196 ℃, one-step high temperature freezing at -12 ℃, and two-step freezing by a freeze-thaw cryogelation cycle at high temperature, followed by freezing at low temperature. The two-step freezing aims to investigate how a change in freezing pattern affects pore structures. In addition, inspired by the debates on the effects of static magnetic fields (SMF) on freezing , an SMF was applied to the cryogelation step of some samples to examine possible changes to the final pore structures.