Development of Mg-Al LDH and LDO as novel protective materials for deacidification of paper-based relics

扫码查看

原文链接

万方数据
维普

外文摘要：Acidification of paper-based relics is a common problem,leading to their degradation and eventual loss.Paper deacidification is highly dependent on a limited variety of alkaline materials,and the develop-ment of new materials that are safe,efficient and easy-to-prepare is highly demanded to ensure a high level of safety and effective protection of paper-based relic.This study proposes the introduction of lay-ered double hydroxide(LDH)and its calcined product,mixed metal oxide(layered double oxide(LDO)),as innovative protective materials for the deacidification of paper with varying levels of acidity.The re-sults demonstrate that treatment with Mg-Al LDH/LDO can effectively modify the pH of acidic paper(e.g.,pH～4.0-6.4)to a neutral or weakly basic state,maintaining this desirable pH range even under long-term accelerated aging condition.Remarkably,LDH proves to be well-suited for the protection of slightly acidified paper(e.g.,pH＞5.5),while LDO serves as an especially option for the deacidification of severely acidified paper(e.g.,pH ≤ 5.5).During aqueous deacidification,due to the memory effect of the LDH-based materials,LDO is converted to rehydrated LDH,which creates a mild and appropriate al-kaline retention in the paper,avoiding damage caused by strong alkalinity such as cellulose degradation and pigment fading during subsequent long-term natural preservation of the paper.Furthermore,Mg-Al LDH/LDO materials also exhibit flame-retardant and bacteriostatic properties.This opens up opportunities for the safe,efficient and multifunctional protection of acidified paper-based relics.

外文关键词：

Layered double hydroxideLayered double oxideStructural memory effectPaper protectionDeacidification

作者：

Sinong Wang、Shanshan Jin、Xue Yang、Yanyan Huang、Peng Liu、Yi Tang、Yuliang Yang

展开 >

作者单位：

Institute for Preservation and Conservation of Chinese Ancient Books,Fudan University Library,Fudan University,Shanghai 200433,China

Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education,Qilu University of Technology(Shandong Academy of Sciences),Ji'nan 250353,China

Department of Chemistry,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Collaborative Innovation Centre of Chemistry for Energy Materials,Fudan University,Shanghai 200433,China

State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200433,China

展开 >

出版年：

2024

DOI：

10.1016/j.cclet.2024.109890

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(9)