Inkjet printing with silk used to create bacteria-sensing gloves

The research, published in the journal Advanced Materials, details how the team used inkjet printing to create materials such as bandages and medical gloves using purified silk protein, or fibroin.

According to the research, this natural polymer’s intrinsic strength makes it suitable for a range of biomedical and optoelectronic applications. Using it as a base material or “cocoon”, the team were able to infuse the fibroin with biomolecules such as enzymes, antibiotics, antibodies, nanoparticles and growth factors.

Combined with traditional inkjet printing technology, the “custom library” of new materials could be transformed into a range of smart medical equipment, such as bacteria-sensing surgical gloves that changed from blue to red when exposed to E. coli.

“We thought that if we were able to develop an inkjet-printable silk solution, we would have a universal building block to generate multiple functional printed formats that could lead to a wide variety of applications in which inks remain active over time,” explained Fiorenzo Omenetto, senior author on the paper and associate dean for research and Frank C. Doble Professor of Engineering at Tufts School of Engineering.