Ma Xiaochun, Zhu Zhaodong, Zhang Haichuan, Tian Shenglong, Li Xiaohong, Fan Huiming, Fu Shiyu
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; Lingnan Literature Protection Research Center, Guangzhou 510640, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Int J Biol Macromol. 2022 May 15;207:232-241. doi: 10.1016/j.ijbiomac.2022.02.179. Epub 2022 Mar 3.
Deacidification and surface self-cleaning are of great significance for the long-term preservation of historic literature. Herein, a superhydrophobic self-cleaning coating, derived from nanocellulose coated with CaCO particles is constructed via chemical vapor deposition (CVD) for the first time for the preservation of historic paper. The static contact angle of superhydrophobic paper reached more than 150° and the minimum sliding angle was 6.4°. Deacidification effect was achieved with a desired pH value in the range from 7.50 to 7.77 and the maximum alkali storage was up to 1.235 mol/kg. It is found that the low-cost CaCO nanoparticles can not only remove the acid substances, but also gave the paper function of self-cleaning, which is very great significant for the protection of paper-based relics.
脱酸和表面自清洁对于历史文献的长期保存具有重要意义。在此，首次通过化学气相沉积（CVD）构建了一种由包覆碳酸钙颗粒的纳米纤维素衍生而来的超疏水自清洁涂层，用于历史纸张的保存。超疏水纸张的静态接触角达到150°以上，最小滑动角为6.4°。实现了脱酸效果，pH值在7.50至7.77范围内，最大碱储存量高达1.235 mol/kg。研究发现，低成本的碳酸钙纳米颗粒不仅能去除酸性物质，还赋予纸张自清洁功能，这对纸质文物的保护具有非常重要的意义。
