SFU professor Woo Soo Kim is leading the research team's discovery involving the use of a wood-derived cellulose material to replace the plastics and polymeric materials currently used in electronics.
The team explain that 3D printing can give flexibility to add or embed functions onto 3D shapes or textiles, creating greater functionality.
"Our eco-friendly 3D printed cellulose sensors can wirelessly transmit data during their life, and then can be disposed without concern of environmental contamination," says Prof Kim. The research is being carried out at PowerTech Labs in Surrey, which houses several 3D printers.
"This development will help to advance green electronics. For example, the waste from printed circuit boards is a hazardous source of contamination to the environment. If we are able to change the plastics in PCB to cellulose composite materials, recycling of metal components on the board could be collected in a much easier way."
Prof Kim's research program spans two international collaborative projects, including the latest focusing on the eco-friendly cellulose material-based chemical sensors with collaborators from the Swiss Federal Laboratories for Materials Science.
He is also collaborating with a team of South Korean researchers from the Daegu Gyeongbuk Institute of Science and Technology's (DGIST)'s department of Robotics Engineering, and PROTEM Co, a technology-based company, for the development of printable conductive ink materials.
In this second project, the researchers developed a new embossing process technology, one that can freely imprint fine circuit patterns on flexible polymer substrate.
Embossing technology is applied for the mass imprinting of precise patterns at a low unit cost. However, Prof Kim says it can only imprint circuit patterns that are imprinted beforehand on the pattern stamp, and the entire, costly stamp must be changed to put in different patterns.
The team succeeded in developing a precise location control system that can imprint patterns directly, resulting in a new process technology. This will have widespread implications for use in semiconductor processes, wearable devices and the display industry.
