Empa researchers have achieved a significant milestone by 3D printing cellulose-based aerogels, unlocking a realm of possibilities for precision insulation and medical applications. Published in Advanced Science, their work merges environmental friendliness, complex structure printing, and exceptional thermal insulation.
This project marks a convergence of biodegradable materials, 3D printing capabilities, and the remarkable insulating properties of aerogels. Leveraging cellulose, the most abundant biopolymer on Earth, the researchers developed an innovative ink composed of cellulose nanocrystals and nanofibers. This ink exhibits ideal flow characteristics for 3D printing, balancing viscosity and liquefaction during extrusion.
Remarkably, the printed cellulose aerogel retains its shape through multiple rehydration and drying cycles, offering versatility and convenience in handling. Its anisotropic nature, influenced by the orientation of nanocellulose fibers and the printing process, allows for tailored thermal conductivity and strength, ideal for applications like microelectronics.
Beyond thermal insulation, the biocompatibility of cellulose opens doors to medical applications, where the porous structure can facilitate drug absorption and controlled release. Moreover, the ability to add active ingredients during the rehydration step ensures potency and efficacy over time.
Looking ahead, the researchers are exploring diverse biopolymers for aerogel production and enhancing cellulose aerogel’s thermal insulation properties. This pioneering work underscores the immense potential of 3D printing in advancing sustainable materials and transformative applications across industries.
Source: empa.ch
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