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Sandia National Laboratories

Dirk, Shawn M.

Sandia National Laboratories is a multimission laboratory managed by National Technology & Engineering Solutions of Sandia, LLC a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration. Sandia has a long history of pioneering AM technology development. In the mid 1990s, Sandia developed laser-engineered net shaping (LENS), one of the first direct metal AM technologies, which was commercialized by Optomec. Robocast, an extrusion-based direct-write process for 3D ceramic parts, is another technology developed at Sandia. It was commercialized by Robocast Enterprises, LLC. As of January, 2019, Sandia was conducting AM R&D projects valued at about $25 million, with an emphasis on: 1) analysis-driven design, 2) materials reliability, and 3) multi-material AM.

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TYPE Other Report YEAR 2018
DOIOSTI

Thermally-activated pentanol delivery from precursor poly(p- phenylenevinylene)s for MEMS lubrication

Macromolecular Rapid Communications

Johnson, Ross S.; Washburn, Cody M.; Staton, Alan W.; Moorman, Matthew W.; Manginell, Ronald P.; Dugger, Michael T.; Dirk, Shawn M.

The synthesis of two new polyphenylene vinylene (PPV) precursor polymers which can be thermally induced to eliminate pentanol is presented. Pentanol has recently been discovered to be a very useful lubricant in MicroElectroMechanical Systems. The utilization of the elimination reaction of precursor polymers to PPV as a small molecule delivery platform has, to the best of our knowledge, not been previously reported. The elimination reactions were examined using thermal gravimetric analysis, gas chromatography, and UV-Vis spectroscopy. Using PPV precursors allows for (1) a high loading of lubricant (one molecule per monomeric unit), (2) a platform that requires relatively high temperatures (>145 °C) to eliminate the lubricant, and (3) a non-volatile, mechanically and chemically stable by-product of the elimination reaction (PPV). The "on-demand" delivery of a vapor-phase lubricant to MicroElectoMechanical Systems (MEMS) will allow for scheduled or as-needed lubrication of the moving components, improving the performance, reliability, and lifespan of the devices. A delivery system utilizing a newly designed microhotplate along with two new precursor poly(p-phenylene vinylene) polymers that thermally eliminate a pentanol lubricant is described. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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TYPE Journal Article YEAR 2012
DOIOSTIScopus
Results 1–25 of 88
Results 1–25 of 88