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Custom-made biocompatible cellulose aerogels from the 3D printer

2024
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
In the present study, the properties of 3D printed cellulose-based aerogels are evaluated. To develop the printer ink, the researchers extracted certain nanoparticles from plant cellulose (cellulose nanocrystals [CNCs] and cellulose nanofibers [CNFs]) and mixed them with water in a specific ratio. The printed models showed remarkable anisotropic mechanical and thermal properties. Their strength and thermal conductivity depended on the orientation of the CNFs as well as on the orientation and speed of the printing process itself. The researchers used this knowledge to print the models in precise shapes. It was observed that the cellulose aerogels retained their surface even after repeated drying and rehydration and their strength was improved. Furthermore, the models had high cell viability and optimized antibacterial properties through the integration of silver nanoparticles. Due to their versatile properties, aerogels are not only interesting as heat insulators in the medical technology sector, but can also be used to develop personalized implants or serve as transporters for certain medications. Overall, the cellulose-based aerogels show high potential for the medical technology and biomedical sectors and can help to optimize medical devices and certain therapeutic treatment strategies. Building on the knowledge gained, the researchers want to research the different properties and potential of the cellulose models in more detail in future projects.
Additive manufacturing of nanocellulose aerogels with structure-oriented thermal, mechanical, and biological properties
Shanyu Zhao, Wim J. Malfait, Gilberto Siqueira
#2070
Added on: 04-09-2024
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