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Colloidal Superdispersants

NSF Nanoscale Science and Engineering Center for Directed Assembly of Nanostructures Rensselaer Polytechnic Institute, DMR-0642573. Colloidal Superdispersants

stephen-potts
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Colloidal Superdispersants

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  1. NSF Nanoscale Science and Engineering Center for Directed Assembly of Nanostructures Rensselaer Polytechnic Institute, DMR-0642573 Colloidal Superdispersants S.K. Rhodes, R.H. Lambeth, J. Gonzales, J.S. Moore, J.A. Lewis, “Cationic Comb Polymer Superdispersants for Colloidal Silica Suspensions”, Langmuir, 25, 6787-92 (2009) NSEC researchers have designed, synthesized, and investigated the effects of a cationic comb polymer on the stability of aqueous silica suspensions of varying ionic strength and pH. Both the comb polymer and its homopolymer analog were synthesized and analyzed leading to the discovery that comb polymer-coated silica microspheres (green) remain stable over a broad range of solution conditions, whereas pure homopolymer-coated silica microspheres (red) rapidly fall out of suspension. By using superdispersants, biphasic nanoparticle mixtures have been designed for direct-write assembly of complex 3D nanostructured materials. These novel inks enable 3D printing strategies for rapid prototyping and near net shape fabrication with an order of magnitude improvement in feature resolution.

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