A novel multi-material printer utilising multi-wavelength high-power lasers has been created by researchers from Nanyang Technological University, Singapore (NTU Singapore), the Singapore Centre for 3D Printing (SC3DP), and an electronics technology company for quick and simple 3D printing of smart, flexible devices.
By using different laser wavelengths, the multi-material printer can convert common carbon-based materials (polyimide and graphene oxide) into a new variety of very porous graphene through heat and chemical reactions. In addition to being light and conductive, the finished structure made with this new graphene may also be printed or coated onto flexible materials like plastics, glass, metals, and textiles to create flexible gadgets.
Traditional electronic devices and parts are made of stiff materials like metals, silicon, and ceramics, but there is growing interest in developing flexible wearable electronics that can be easily bent, twisted, and moulded to different surfaces.
According to the co-leader of the project, Associate Professor Murukeshan Vadakke Matham from NTU School of Mechanical and Aerospace Engineering (MAE) and SC3DP, the national centre of excellence in 3D printing, the project aims to find a way to 3D print new materials like organic polymers and carbon-based materials like graphene, which have properties that allow them to be printed or coated onto flexible substrates like plastics or fabrics, creating flexible and stretchable circuits.
Assoc Prof Murukeshan, who serves as the Principal Investigator at Singapore’s National Additive Manufacturing Innovation Cluster (NAMIC), further stated that because 3D-printed flexible electronics may be lighter and smaller, they pave the way for more mobile and pleasant wearable technology. With modern flexible electronics, they can now construct unusual structures that were previously unachievable.
With support from NAMIC, the research team also investigated the viability of incorporating 3D-printed components into the creation of high-performance electronics like pressure sensors and heaters.
The process makes it possible to produce extremely conductive and porous graphene-based materials for use in a variety of applications. The process is more expedient, less expensive, and highly compatible with a variety of materials as compared to conventional graphene fabrication techniques.
The new 3D printer, according to the researchers, provides a level of versatility and functionality unmatched by any comparable items on the market. According to the project participants, the breakthrough has the potential to revolutionise the 3D printing industry and create new opportunities for new product development.
The Industrial Post-graduate Programme (IPP) of the Singapore Economic Development Board (EDB) supported the project’s inception in 2016 to create a new multi-material printer. The project team has presented at 11 international conferences, published 11 papers, and applied for two patents over the years. Additionally, it helped three Panasonic engineers and scientists get their doctorates at NTU.
The use of additive manufacturing for numerous applications and industrial sectors, including electronics and wearable technology, is being researched at the Singapore Centre for 3D Printing (SC3DP).
To facilitate further testing of ideas employing parts made by the multi-material printer, a new facility for laser-based manufacturing systems will open as a research hub in Singapore.
The researchers’ unrelenting efforts to construct a high-power laser printer demonstrate their commitment. Their dedication to developing 3D printing technology demonstrates their desire to push the limits of innovation and make it possible to produce smart, flexible products. They strive to revolutionise production techniques and create fresh opportunities for the development of technology through their diligent efforts.
