Deacidification of Paper Using Supercritical Carbon Dioxide Containing Calcium Propionate or Magnesium Bicarbonate

Abstract:

Supercritical carbon dioxide (SCCO₂) containing calcium propionate or magnesium bicarbonate was used to deacidify paper. In the experiment, to compare the effects of SCCO₂ technology deacidification and immersion deacidification, two kinds of paper samples were chosen to do these two kinds of deaciditication tests respectively. And pH, alkali reserve and mechanical properties of paper samples were measured before and after these treatments. The experiments showed that the pH and alkaline reserve of paper samples treated with SCCO₂ were nearly similar to that of immersion treatments. Otherwise, compared with immersion deacidification, supercritical carbon dioxide had some advantages of strengthening the mechanical properties of paper and shortening treatment time.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2637-2640
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2637
• Online since: September 2013
• Authors: Wei Tan, Li Fen Cheng, Yan Xiong Fang
• Keywords: Calcium Propionate, Deacidification, Magnesium Bicarbonate, Mechanical Property, Paper, pH, Supercritical Carbon Dioxide

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