Fluorescence studies of polymer adsorption . 1. Rearrangement and displacement of pyrene-terminated polyethylene glycol on colloidal silica particles

Langmuir ◽  
1988 ◽  
Vol 4 (4) ◽  
pp. 989-998 ◽  
Author(s):  
Kookheon Char ◽  
Alice P. Gast ◽  
Curtis W. Frank
Keyword(s):  
Polyethylene Glycol ◽  
Colloidal Silica ◽  
Polymer Adsorption ◽  
Silica Particles ◽  
Fluorescence Studies

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

2014 ◽  
Vol 1663 ◽  
Author(s):  
Dmitry Fomitchev ◽  
Russell Lewis ◽  
Hairuo Tu ◽  
Li Cheng ◽  
Hajime Kambara ◽  
...  
Keyword(s):  
Particle Size ◽  
Colloidal Silica ◽  
Silica Particles ◽  
Laser Printer ◽  
Mass Ratio ◽  
One Pot ◽  
New Class ◽  
New Material ◽  
Hydrophobic Treatment ◽  
Hydrophobic Material

ABSTRACTWe 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.

Density gradients prepared from colloidal silica particles coated by polyvinylpyrrolidone (Percoll)

1978 ◽  
Vol 88 (1) ◽  
pp. 271-282 ◽  
Author(s):  
Håkan Pertoft ◽  
Torvard C. Laurent ◽  
Torgny Låås ◽  
Lennart Kågedal
Keyword(s):  
Colloidal Silica ◽  
Silica Particles ◽  
Density Gradients

Packing structures of colloidal silica particles formed by drying condensed suspensions

2019 ◽  
Vol 38 (3) ◽  
pp. 385-394 ◽  
Author(s):  
Hayato Miyazaki ◽  
Kohei Abe ◽  
Susumu Inasawa
Keyword(s):  
Colloidal Silica ◽  
Silica Particles
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