Ideal parameter for 3D printing

A parameter set for 3D printing graphene-based structures with optimized conductive qualities has been developed. Researchers from the FAMU-FSU College of Engineering made several experiments and they discovered two properties of composite materials in relation to printing:

  1. Print pressure and nozzle diameter have effects on the material
  2. At specific speeds, its particles could be aligned vertically

By exploiting these factors, the researchers created a material that had improved resistance and conductivity. This could be ideal for military applications, such as 3D printing shielding or heat sinks.

Professor Subramanian Ramakrishnan, the lead author, said

“We found that a wide-range of matrix filler combinations allow for versatility in the properties of the printed material. By fine tuning the way they are processed, we can suggest guidelines that maximize the effectiveness and performance of the composites.”

This project could pave the way for a new generation of composite materials.

Matrix-filler composites 

Composites are often used in 3D printing and there are so many matrix-filler combinations available that you can customize them according to the needs of their application. Similarly, graphene nanoplatelets (GNPs) can also adapt to technical requirements. And this is possible thanks to their size and their optimal thermal and electrical properties.

Epoxy resins, known for their flexibility and easy processing, could combine perfectly with GNPs and thus create thermal interface materials. However, the properties of these composites would depend on elements such as the rheology of the inks used or their concentration (areas not yet completely understood).

Thanks to previous studies, we know that using Direct Ink Writing (DIW) to 3D print GNP-loaded materials induces a shear force on their filler. This action causes particle alignment with the orientation of the print. how this happens is a mystery, the academic staff tried to quantify the exact mechanics of the process

Ramakrishnan explained

“Our aim is to 3D print lightweight conductive composites and to study the effect of printing conditions on particle orientation and final composite performance. The combination of epoxy resins and graphene nano-platelets is of interest in several applications for the U.S. Air Force.”

Subscribe now to our quarterly Compositi newsletter
to stay updated on news, technologies and activities 

 

Source: 3D Printing Industry


Leggi anche

Assocompositi bandisce un concorso nazionale dedicato in modo esplicito e diretto a sviluppare ed approfondire tematiche connesse al settore dei materiali compositi fibrorinforzati. Compositi Magazine, network ufficiale di comunicazione di Assocompositi, pubblicherà sulla rivista un estratto dei progetti premiati e Assocompositi coinvolgerà i propri Soci industriali per fornire un supporto all’eventuale sviluppo del progetto…

Leggi tutto…

Successful development of a lightweight thermoset based on renewable and regional raw materials. This article – published in the March issue of Compositi Magazine – talks about plastics for a green future. …

Leggi tutto…

The realization of a human settlement on the Moon is the main purpose of most future space missions. Despite it represents a fundamental and necessary step for this scope, the lunar environment, and high mission cost do not make this challenge easy. This article – published in the March issue of Compositi Magazine – tries to solve the previously mentioned problem, showing the preliminary design of a lightweight and deployable habitat able to ensure long-duration missions on the lunar surface….

Leggi tutto…

The chassis patented by BMW is similar to that of the supersport S1000RR. The innovation lies in the composition of composite panels from different materials (carbon fiber, aramid and synthetic composite) that are screwed to the structure to change the resistance…

Leggi tutto…

The biennial agreement was renewed between the racing team of the university, Unibo Motorsport, and the Ducati Foundation. thanks to the sponsorship and technical support of Ducati, strengthens the partnership that allows the team of the University of Bologna to give students innovative training courses and to carry on the Unibo Motostudent project on the track, in international races, with an electric motorbike designed by the students…

Leggi tutto…