Abstract
Improving the dispersion or suspension of magnesium oxide micro/nanoparticles in fluorocarbon solvent is the key to ensure the efficient and stable deacidification of paper. Here, we chose a dispersant of sodium perfluorononenoxybenzene sulfonate (OBS), to improve the dispersion stability of nano magnesium oxide (nano MgO) in a fluorocarbon solvent without affecting original performance of paper, and then optimized deacidification performance of paper. After addition of OBS, nano MgO was able to stably disperse in fluorocarbon solvent for up to 1 h. With 0.1 wt% OBS, nano MgO could have excellent deacidification effect and good alkali reserves on paper with different ages. In addition, the physical properties had been slightly impacted. MgO is uniformly dispersed in the cross-section of paper fibers, contributing to increasing the strength of paper sheet. Moreover, the paper still showed good resistance to acidification after dry-heat aging. Overall, this work provides an effective and simple paper deacidification method.
Published Version
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