Study on Deacidification and Reinforcement of Aged Paper by Nanocellulose Collaborated in-situ Synthesized Calcium Carbonate [原位形成碳酸钙协同纳米纤维素对老化纸张脱酸增强的研究]

作者：Qi S.; Ren J.^*; Cao X.; He B.; Fan H.

来源：China Pulp and Paper, 2022, 41(5): 52-58.

DOI：10.11980/j.issn.0254-508X.2022.05.008

• Aged paper
• Deacidification
• In-situ synthesis of calcium carbonate
• Nanocellulose
• Reinforcement

A protection method for deacidification and reinforcement of aged paper by synthesized calcium carbonate in-situ and collaborated nanocellulose was proposed. The effects of different treatment methods and nanocellulose concentration on properties of aged paper were discussed. The results showed that the paper was treated by pressure atomization of 0.1 mol/L calcium propionate and 0.1 mol/L sodium carbonate aqueous solution to synthesize calcium carbonate in the paper in-situ for deacidification. Then the paper was enhanced by 1 wt% nanocellulose. After treatment, the pH value of the aged paper sample reached 8.40, the alkaline reserve was about 245 mmol/kg, the tensile index and the folding endurance increased by 19% and 109%, respectively, compared with the untreated sample. The treated paper also had excellent anti-aging and mold resistance.

• 单位
  华南理工大学; 制浆造纸工程国家重点实验室