Date of Award

6-2001

Degree Name

Master of Science

Department

Chemical and Paper Engineering

Department

Paper Engineering, Chemical Engineering and Imaging

First Advisor

Dr. Margaret K. Joyce

Second Advisor

Dr. Thomas Joyce

Third Advisor

Dr. Alexandra Pekarovicova

Access Setting

Masters Thesis-Open Access

Abstract

This research was focused on determining the influence of applying one type of potato starch of various molecular weights on silicone holdout. Also, combinations of potato starch with a rheology modifier, sodium alginate, of low, medium, and high molecular weight were studied. The base paper employed was a commercially available paper generally used to manufacture release papers.

Sizing with low molecular weight potato starch is more effective for silicone holdout than sizing with high molecular weight potato starch. This study showed that the paper sized with low molecular weight potato starch has a smoother surface, lower permeability, and a smaller average pore size compared to paper sized with the high molecular weight potato starch. Thus, this paper provides better silicone holdout than was achieved by high molecular weight potato starch.

The addition of alginates to the starch solution decreased Gurley porosity significantly. In addition, the alginates decreased the average pore size; the decrease was more evident with the lower molecular weight alginates. Due to more favorable paper properties such as lower permeability, lower water penetration rate, smaller : average pore size, the silicone agent is better retained on the surface of the paper. This could lead to decreasing the amounts of silicone applied to the sized paper, resulting in lower costs for silicone treatment.

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