Date of Award

12-1989

Degree Name

Master of Science

Department

Paper Engineering, Chemical Engineering and Imaging

First Advisor

Dr. Raymond L. Janes

Second Advisor

Dr. Gerard Seivers

Third Advisor

Dr. David K. Peterson

Fourth Advisor

Bill Forester

Access Setting

Masters Thesis-Open Access

Abstract

The objectives of this study were to optimize the variables of pH and surfactant concentration for the maximum flotation efficiency of ultraviolet radiation-cured inks and to increase the understanding of the behavior of the ink particles during flotation. Experiments were designed in two phases: water and ink system and water, fiber and ink system. At 7.t pH at room temperature the flotation efficiency increased with surfactant concentration to 8.2 <μ/>M/L and then dropped with increase in surfactant concentration. Statistical analysis showed that maximum flotation efficiency of 94.8% was obtained at pH of 7.56 at 12.18 <μ/>M/L surfactant concentration. Ink particles in the size range of 26-45 <μ/>m were found most suitable for flotation. Zeta potential had a linear relationship, negatively, with pH and surfactant concentration for both the ink and water and ink, fiber and water systems.

Included in

Engineering Commons

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