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Colloidal Silica/Poly(Methacrylsiloxane) Nanocomposite Particles: Synthesis, Characterization, and Application in Toners.

Published online by Cambridge University Press:  20 February 2014

Dmitry Fomitchev
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
Russell Lewis
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
Hairuo Tu
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
Li Cheng
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
Hajime Kambara
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
Geoffrey Moeser
Affiliation:
Cabot Corporation, 157 Concord Road Billerica, MA 01821, U.S.A.
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Abstract

We report on a new class of materials for laser printer toner applications. These materials were prepared from methacrysilane-in-water emulsions stabilized with colloidal silica particles. In this elegant system, the colloidal silica particles reside at the water/oil interface helping to emulsify the oil droplet, self-organizing into a raspberry-like morphology. The emulsion formation is followed by free-radical polymerization, hydrophobic treatment, and drying steps. This one pot synthesis in water affords a hydrophobic material with a particle size in the range of 80 to 300 nm. The particle size could be fine-tuned by changing the oil-to-silica mass ratio or by using colloidal silica particles of different sizes. Results of material characterization by solid-state NMR, electron microscopy, and particle size measurements methods will be presented. Examples of possible extensions of the synthesis towards materials with methacrylsilane partially substituted with other methacrylates will be provided. Application of the new material in toners will be described as will the comparison of its performance with the incumbent material - hydrophobic colloidal silica.

Type
Articles
Copyright
Copyright © Materials Research Society 2014 

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References

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