Researchers at the University of Nottingham have unveiled a discovery in 3D printing technology, introducing a novel coating for plastic particles that amplifies their functionality. Published in Nature Communications, their method utilizes supercritical carbon dioxide to coat PA-12 polymer particles, commonly used in 3D printing processes. This innovation brings forth a spectrum of benefits, including the integration of color and the introduction of anti-mould and anti-fungal properties directly into the printing process.
Powder bed fusion involves layering and fusing polymer powder using lasers. PA-12, a robust plastic, frequently features in this method, especially in industries like automotive and aerospace. However, conventional practices limit the material’s versatility and color options. This newly developed coating not only expands the palette of available colors but also addresses issues like mould and fungal growth, previously restricting the use of 3D printed objects in humid environments.
“A key benefit of this process is that it can easily be incorporated into current commercial 3D printing processes and this could be potentially transformative for the industry in widening scope by introducing new functionality, simplifying processes and importantly achieving all of this sustainably,” said Professor Howdle, Head of the School of Chemistry.
The significance of this advancement lies in its seamless integration with existing manufacturing processes. By aligning the mechanical and thermal properties of the coating with those of PA-12, the researchers ensure compatibility with commercially deployed machines. This breakthrough not only enhances the aesthetic appeal of printed objects but also broadens their functional capabilities, paving the way for broader applications across various industries.
Source: nottingham.ac.uk
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