Photopolymerization of powder suspensions for shaping ceramics

Photopolymerization of acrylate suspensions with visible dyes

“…Here we investigate the effect of the dyes on the curing behavior of a suspension of silicon dioxide powder in a diacrylate monomer. Such photopolymerizable powder suspensions are of interest in direct digital manufacturing, 4 stereolithography, 5 and advanced fabrication methods. 6 The curing behavior is examined via two techniques: measurements of the cure depth vs. energy dose; and photorheology, where the viscosity changes are monitored during illumination.…”

Radical depletion model for intensity effects on photopolymerization

“…1 Photopolymerization behavior depends upon the conditions such as UV light source, light intensity, the presence of inhibitors, temperature etc., as well as the concentration of the photoinitiator and presence of other photoactive species such as light absorbers in the monomer solution. 2 The intensity of illumination is an important variable. In some cases, the degree of photopolymerization depends only upon the product of the intensity and the illumination time, or the energy dose.…”

“…Note that Eq. (2) does not consider any specific particles parameters such as for example size, shape, refractive index or light absorption. This dose-equivalent critical energy dose was found experimentally to be a linear function of dye concentration c D and inhibitor concentration c INH , and reciprocal photoinitiator concentration 1/c P , in agreement with Eq.…”

A review on additive manufacturing and its way into the oil and gas industry

“…can also be used. [19][20][21][22] In DMLS, metals and alloys are used to build the parts e.g. steel and cobalt chrome.…”