Gelcasting of alumina-chitosan beads |
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Authors: | Jamile BrandiMariselma Ferreira,Rafael Salomã o |
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Affiliation: | a Federal University of the ABC Region, Rua da Catequese, 242 ZIP 09090-400 Santo André, SP, Brazil b São Carlos School of Engineering (SMM-EESC), University of São Paulo, Avenida Trabalhador São-carlense, 400 ZIP 13566-590 São Carlos, SP, Brazil |
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Abstract: | Several papers have reported the advantageous combination of chitosan and ceramic particles for such applications as biomimetic scaffolds, membranes, pollution remediation and gelcasting complex shapes. This work presents a novel gelcasting consolidation mechanism, based on the effects of pH changes on chitosan solubility and zeta potential of alumina particles. Unlike other chitosan-based gelcasting methods, it employs a small content of organic material (lower than 3 wt%) and does not require crosslinking agents (such as glutaraldehyde). With this new method alumina beads with 0.5-1 mm diameter could be produced, whose porosity and specific surface area could be tuned for various applications. |
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Keywords: | Gelcasting Alumina Chitosan Beads |
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