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

Study on Deacidification and Reinforcement of Aged Paper by Nanocellulose Collaborated in-situ Synthesized Calcium Carbonate

关键词:  老化纸张  碳酸钙原位形成  纳米纤维素  脱酸  增强

Key Words:aged paper  in-situ synthesis of calcium carbonate  nanocellulose  deacidification  reinforcement

摘要:本课题提出在老化纸张中原位形成碳酸钙并协同纳米纤维素脱酸处理增强的保护措施，探讨了不同处理方式及纳米纤维素浓度对老化纸张性能的影响。结果表明，先利用0.1 mol/L丙酸钙及0.1 mol/L碳酸钠水溶液压力雾化处理纸张，在纸张中原位形成碳酸钙进行脱酸，再利用1 wt%纳米纤维素进行增强。处理后老化纸样pH值达8.40，碱存储量约245 mmol/kg，抗张指数和耐折度较处理前分别提升了19%、109%，且具有优异的抗老化和防霉性能。

Abstract: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.