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Mohammed Islam
(734) 647-9700 1110 EECS1301 Beal AvenueAnn Arbor, MI 48109-2122

Additive Manufacturing (3D Printing) Of Plastics & Photopolymers

Current experiments utilize a Short-Wave Infrared Super Continuum (SWIR-SC) laser with a wavelength range of 2.0-2.5µm to sinter various thermoplastic powders.  Selective laser sintering is a 3D printing technique that uses a CO2 laser to melt a design into a layer of thermoplastic or metal powder.  A new layer of powder is then rolled out and on top of the previous layer and parts are built up incrementally.  We have verified C-H combinational band absorptions from 2.15-2.5µm in 11 different thermoplastics via FTIR spectroscopy.  Furthermore, we have benchmarked rods created with the SWIR-SC laser against rods created using a CO2 laser, a diode laser, and a 75nm filtered SWIR-SC spectrum.  These rods were found to be 1.5-5x stronger than CO2 created rods.

Future experiments will focus on integrating the SWIR-SC laser with commercial selective laser sintering machines to further benchmark strength of different structures built using this light source.

SWIR laser machine


“3D Printing of Thermoplastics with Higher Strength Using SWIR-Supercontinuum Laser” (2016)