Читать книгу 3D Printing of Foods - C. Anandharamakrishnan - Страница 47

A laser power source is applied to a powdered bed of feed material that causes the agglomeration of the particle through the sintering process. The SLS technique works well for the construction of multi‐layered 3D food constructs. The process involves the superficial melting and fusion of materials without the use of liquid binders to form a 3D construct. The researchers of the Netherlands Organization for Applied Scientific Research (TNO) used this technology for sugar‐based 3D constructs with tailored nutrition and flavour (Van der Linden 2015). Works of literature were available on the development of sugar cubes and curry cubes using SLS that adds convenience to cooking (Nachal et al. 2019). SLS technique has a great control over the internal microstructure and porosity that imparts novel brittle texture. Sometimes the printed objects show a surface deformation and shrinkage due to the impact of laser irradiation of materials. Further, SLS is limited by its lower sintering speed and its suitability only for those materials that have low melting points such as sugars, lipids, and starches. The SLS technique of 3D printing is well established in the non‐food sectors particularly in tissue engineering and pharmaceutical formulations (Awad et al. 2020). However, the technology must be studied in detail for broader applications of SLS in the delivery of nutraceuticals and functional bioactive compounds in 3D printed foods.

Figure 2.10 3D printed sugar constructs using sintering process (a) 2D patterning, and (b) 3D printed complex sugar geometry by Windell H. Oskay retrieved from http://www.evilmadscientist.com.

Source: Reprinted with permission from CandyFab (2014).