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Open Seminar on 3D printing, Minutes

Welcome back to SPOMAN Open Science anno 2018!

This year the Open Science Meetings have been renamed and rebranded and are now known as Open Seminars. The dates are as we know them – the last Thursday of the month (most months) but the content now focuses on single topics, both to give a broader overview of the field but also to invite YOU to participate in the concluding debate – stating your needs, so we can design the most relevant SPOMAN Open Science projects!

This semester we welcome 11 new Open Science students to the SPOMAN collaboration – this means we now include 15 students from bachelor level to master level. Some of the students will enter existing project teams; we hope you will welcome them all into your teams!

 

3D printing Then, Now, And in the Future.

Talk by Jens Vinge Nygaard, AU

3D printing has already evolved a lot since the 80s when MIT introduced it. Many different 3D print methods and innovations evolved – always followed by a period with process specific material research. The big topics in 3D printing are speed and resolution. These issues are sought resolve by the recent methods CLIP and One-step volumetric additive manufacturing.

To make 3D printing truly industrially relevant, material development is now needed! We have already seen some attempts to alter the material properties both by treating a precursor material and by using composites.

 

Electrospinning as additive printing

Talk by Menglin Chen

Always base the choice of material and 3D print method on the end goal. If the goal is small precise structures, you might want to choose electrospinning. By combining the right materials and electrospinning, it will be possible to print components useful in drug delivery – it is even possible to tone the materials to do either passive or active drug delivery…!

 

3D printing in Biotechnology

Talks by Morten Ø. Andersen, SDU

3D printing is today part of specialized productions and has a future in among others, the healthcare sector. Today 3D print is part of the preparation, prior to complicated operations, but in the future 3D printed elements might become part of the operation itself. At SDU, Morten and others are working on printing personalized structures for facial reconstructions. In this area, the choice of material is crucial!

3D printing in real life

Talk by Lasse Staal, AddiFab

AddiFab takes another approach. As 3D printing often struggle with precision, repeatability and a very significant lack of adequate materials, AddiFab do free form injection molding instead. Complex molds are 3D printed and ready for molding – to get the molded structure free of the form, the mold is printed in decomposable materials.

 

Challenges and Industrial Needs

Discussion initiated by Thomas Gøgsig, Ecco and moderated by Jens Vinge Nygaard, AU

After a day of inspiring talks, it was quite clear that material research is the next big thing in 3D printing. Materials systems is need to accommodate the latest innovations in 3D print processes. This is essential not only explore the printability of new materials, but also in order enable us to tune the properties of the printed objects.

The mechanical properties of the print materials and printed objects is crucial. Thus for future SPOMAN projects in this field focus should be on designing suitable materials.

Future industrial need

  • PU with tuned properties
  • Fiber-strengthened polymers.
  • SLA ceramic printing
  • Metal printing

What is important to YOU?
Please, send an email to iben@spoman-os.org

  • Light/biodegradable polymers?
  • Silicone?
  • Hydrogels?
  • Software development?
  • Speed?

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Perspective on 3D printing technologies

Jens Vinge Nygaard, Department of Engineering, AU

3D printing technologies originated in the 1980’ties when Computer Numerical Control (CNC) technologies was applied to materials processing allowing micrometer precision to the joining of materials. During the following decades and up to today numerous techniques on how to additively combine materials emerged. Typically, for a specific printing process the research, which follows, leads to a class of patents on material system used together with the process. During the 2010’ ties, the initial patents ran out and we have seen a large commercialisation of the initial technologies. This lead to awareness of the potential of these approaches to reduce the production time of advanced geometries, and to invent new smart materials (composites, structural graded materials). During my talk, I will elaborate on this technological development with the purpose of placing it in a SPOMAN context.

 

3D bioprinting from basic science to translation in the healthcare sector

Morten Østergaard Andersen, Institute of Chemical Engineering, Biotechnology and Environmental Technology, SDU Biotechnology

The potential for improving the healthcare sector with 3D printing is tremendous. We will present a number of different healthcare related projects wherein we have used 3D printing. One project concerns the 3D printing of brain tumor models for surgical preparation. Another concerns the development of a new 3D printing method for 3D printing electrical sensors. But most of the talk will concern the development of different types of bone implants that are made using a wide variety of 3D printing methods and materials. We will show how we make these patient fitted using a combination of CT-scanning, virtual reconstruction and 3D printing. We will discuss how we have taken this technology from inception through in vitro and mouse trials to a full scale test in pigs that replicates the eventual clinical case and how we intend to translate the technology clinically and commercially. We hope that the talk will spur a discussion about how 3D printing can revolutionize the healthcare and related sectors and on how to bring about that change.

 

Electrospinning and additive manufacturing: converging technologies

Menglin Chen, iNANO and Department of Engineering, AU

Additive manufacturing is a broad term for an increasing number of techniques such as fused deposition modeling, selected laser sintering, stereolithography and inkjet printing, in which complex structures are constructed in a layer-by-layer manner according to computer aided design. Electrospinning relies on an electrified viscous fluid (solution or melt) jet being drawn through the air towards a collector which is at a different electric potential. If there are sufficient molecular entanglements in the polymer, the jet does not break up into droplets due to Raleigh instabilities, and deposits continuously to create a non-woven mesh of fibers. In general, the limitations of AM include lower resolution fabrication limits, while electrospinning is unable to accurately reproduce 3D structures. Shortfalls within each technology could be solved by combining the two processing methods into one generic concept to design and fabricate structural morphologies down to submicron scale.

 

Additive Manufacturing – trends, challenges and cases from the Danish industry

Jeppe Skinnerup Byskov, Danish Technological Institute

Additive Manufacturing (AM) is a rapidly growing industry and AM has changed from mainly being a prototyping technology to an actual production method. However, a number of challenges are still to be resolved before a widespread use of AM is realistic. In this presentation I will present some of these challenges along with the current trends and furthermore discuss cases from the Danish manufacturing industry where the possibilities of AM has been utilized to create innovative products.