CNC is known to create self-supporting percolated networks due to hydrogen-bonding interactions between individual particles in the colloid form . This rigid percolation is different from the entangled mesh network created by polymer chains bending and wrapping around each other, as in the case of many natural or synthetic polymers . This percolation property of the CNCs has been harnessed to produce hydrogels and aerogels via freeze-thawing or freeze-casting , although the porosity of the resulting CNC networks has not been studied in detail, and no work has been done to examine the freeze casting of MNP-decorated CNC scaffolds. The experiments described herein aim to provide a reference for the freeze-casting fabrication and characterization of cryogel scaffolds using the colloidal gels of CNCs and MNP-decorated CNCs (CNC-MNP).