Researchers from the University of Jyvaskyla in Finland are exploring SLS 3D printing techniques, outlined in the recently published ‘Fabrication of Porous Hydrogenation Catalysts by a Selective Laser Sintering 3D Printing Technique.’ For this study, the team used porous, solid objects for easy attachment with the active component Pd/SiO2. To manipulate the properties, they varied printing parameters.
Realizing the benefits of using porous SLS 3D printed objects over powder-based catalysts, the team of researchers has been able to SLS 3D print solid but porous flow-through filters for selective capturing of Au, Pd, and Pt from acidic leachate of electronic waste. Palladium on silica (Pd/SiO2 with 5 wt % palladium) is commercially available and was mixed with polypropylene (PP). The research focused on how the porous material affected catalytic activity, while also examining hydrogenation activity.
In ‘introducing the catalysts,’ the researchers used 3D printed magnetic stir bar covers, but they point out that such a project could easily be elevated with different samples of more complex geometries. They began by taking images of the 3D prints to check out the pores caused by the voids in between the layers which were only partially melted.
“The porosity and the dispersion of SiO2 particles within the 3D-printed objects was also confirmed by using X-ray tomography and SEM−energy-dispersive system (EDS) analysis which further showed the even distribution of the particles,” stated the researchers.
They also noted that the material is ‘fully comparable’ to pure PP plastic, causing no effect at all on thermal properties. X-rays showed peaks of both PP and Pd, and while they were not able to see SiO2, the researchers attributed the absence to its amorphous nature. Good thermal and mechanical properties were noted, along with good resistance to leaching.
“The results also showed that the employed printing process does not have a significant impact on the catalytic performance of the catalytically active additive. Furthermore, SLS sets only minimal requirements for the printing materials, and both the catalytically active component, as well as the supporting matrix, can be altered in almost any fashion imaginable,” concluded the researchers.
“We believe that 3D printing can change the way we produce our catalysts in the future.”
While SLS 3D printing is one of the most classic forms of 3D printing, it is still one of the most useful and popular, leaving scientists to expend a great deal of research time attempting to refine materials and techniques, from creating bone tissue scaffolds to creating high-performance polymers for use in manufacturing as well as more flexible materials for creative endeavors like making costumes.
What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.
You May Also Like
3D Printing COVID-19: First Do No Harm
We must be mindful that just because we can make a design that this design is not necessarily the right one. While I’m buoyed by the 3D printing industry’s efforts...
An Editorial About Face
Around five weeks ago I made a decision for us to not write at all about Covid-19/Corona Virus. I had seen the fear on the sunken faces of friends and...
3D Printing for COVID-19, Part Two: Spare Valves for Oxygen Masks
The idea that 3D printing could be used to help respond to the COVID-19 pandemic may have first been triggered by work being performed in Chiari, Italy. Our friends at...
COVID-19 Response: 3YOURMIND Creates Order Management Platform for 3D Printed Supplies
The news on everyone’s mind these days is the coronavirus, or COVID-19. Its proper name is SARS-CoV-2, which stands for severe acute respiratory syndrome coronavirus 2, and it seems like...
View our broad assortment of in house and third party products.