Month: November 2018

UConn, UMass Lowell, Georgia Tech to Collaborate with Industry on 3D Printing Research Supported by NSF

Multi-material micro-lattice polymeric structures fabricated using 3D printing
Multi-material micro-lattice polymeric structures fabricated using 3D printing

UConn, the University of Massachusetts Lowell (UMass Lowell), and Georgia Institute of Technology (Georgia Tech) announced a collaboration to establish SHAP3D, a National Science Foundation (NSF) Industry-University Cooperative Research Center (IUCRC), to address emerging challenges of additive manufacturing, also commonly referred to as 3D printing.

IUCRCs bridge the gap between early academic research and commercial readiness, supporting use-inspired research leading to new knowledge, technological capabilities and downstream commercial applications of these technologies.

“This Center will address the grand challenges that prevent the entire 3D printing field from moving forward,” says Joey Mead, Distinguished University Professor and David and Frances Pernick Nanotechnology Professor in the Department of Plastics Engineering at UMass Lowell. Mead serves as the center director of the Center for Science of Heterogeneous Additive Printing of 3D Materials (SHAP3D).  Read the full UConn Today Story.

Intriguing Flexible Devices Based On Mechanoluminescence

Photo: Pixabay

Mechanoluminescence (ML), also called triboluminescence (TL), refers to the phenomenon/process that materials could emit light under mechanical stimuli, e.g., friction, stretch, compression, impact, etc. The ML materials could utilize the ubiquitous mechanical energy in daily life to generate light emissions, avoiding the requirement of an artificial photon- or electron-excitation source as that in photoluminescence (PL) or electroluminescence (EL). Therefore, ML materials show great advantages in energy saving and environmental protection.

For practical applications, ML crystals or powders are required to composite with bulk matrices to generate structural non-destructive ML. Among the fabricated ML composites, elastomer-based ones have attracted increasing attention owing to the rising requirement of incorporating stress sensing characteristic into flexible/wearable devices. The present ML elastomer composites mainly employ transition metal ion doped sulfides (TM-sulfides) as the luminescent components because of their intense ML intensity. However, the TM-sulfides usually have poor chemical stability and may cause severe environmental pollution as well as lack of rich emission color.

Theoretically, rare earth doped oxides (RE-oxides) are promising alternatives because of their high chemical stability, nontoxicity, and abundant energy levels. It is essential to develop efficient and ideally multicolored ML of RE-oxide based elastomer composites, so that flexible devices may possess remarkable and environmentally friendly mechanical responsive optical characteristics.  Read the full story at Science Trends.