Porous silica nanoparticles are attractive for a number of applications including drug delivery, imaging, and numerous others. Corrosion protection of electronics from environmental hazards is done via RTV silicones. RTVs contain fumed silica for rheology controls and reinforcement. To protect electronic components, we have prepared porous and non-porous silica nanoparticles with diphenylphosphinoethyltriethoxysilane (DPPES) through copolymerization and surface modification. Due to sulfur based corrosion, phosphines were selected as a functionality for their ability to bind and reduce disulfide bonds. The nearly monodisperse, spherical porous particles, have diameters ranging from 100-500 nm and pores of 2-6 nm. The silica particles (20-40 wt%) were blended with RTV silicone, which initially contained no fillers, coated onto resistors and tested in a sulfur corrosion environment to determine the effectiveness of the anti-corrosion porous silica nanoparticles. Details relating to the preparation, characterization, and particle application in preventing corrosion in electronic assemblies will be discussed.

Spherical mesoporous silica nanoparticles for anticorrosion applications

244th National Meeting (2012)

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