Abstract
Paper sheets having a lignin content of ~12% by mass (kappa = 78) containing 50% fines prepared from slurries, soy lecithin, and β-cyclodextrin display an unusually low density (i.e., high bulk) and rapid water dispersibility. It is postulated that lecithin adsorbs to fiber lignin and the cyclodextrin associates with the lecithin. The cyclodextrin subsequently expands the sheet in the z-direction because it is a hydrophilic species embedded within a hydrophobic matrix. The sheet is water dispersible owing to its high bulk, and disintegrates at nearly the same rate as toilet tissue. Potential applications include packaging or thermal insulation products such as coffee sleeves that can be safely flushed away in water after use.
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