Abstract
Freeze-casting is a solidification technique for fabricating scaffolds with tunable micro-scale porous structures. In this chapter, the processing principles, theories, and experimental parameters of freeze casting technique are introduced. Two selected natural bio-ceramics, namely silica-based diatomite and fish scale-extracted hydroxyapatite, are utilized as raw materials to fabricated scaffolds and composites. The intrinsic nano-porous features of diatomites are well preserved and integrated with the aligned micro-channels formed by ice dendrites during freezing. The hierarchical porous scaffolds exhibit ultra-lightweight, high porosity, superhydrophilicity and can be applied in the fields of filtration, water absorption and retention, oil–water separation, and thermal insulation. Fish scale-extracted hydroxyapatite scaffolds and composites are eco-friendly and cost-effective and can be heavy metal ion adsorption from wastewater and biomedical fields, such as bone grafting or dental materials. Future perspectives and applications of freeze casting technique are discussed.
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Chen, PY., Chang, HK. (2023). Multifunctional Bio-ceramic Scaffolds and Composites Fabricated by the Freeze Casting Techniques. In: Najman, S., et al. Bioceramics, Biomimetic and Other Compatible Materials Features for Medical Applications. Engineering Materials. Springer, Cham. https://doi.org/10.1007/978-3-031-17269-4_9
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DOI: https://doi.org/10.1007/978-3-031-17269-4_9
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