改良铜乙二胺法应用于手工纸特性黏度和聚合度测定的适用性探讨  

Studies on the applicability of a modified copper ethylenediamine method for the determination of intrinsic viscosity and degree of polymerization of handmade paper

作　　者：刘鹏 章若红[4] 江艳[4] 刘峻[4] 孙梦捷[4] 闫玥儿 唐颐 LIU Peng;ZHANG Ruohong;JIANG Yan;LIU Jun;SUN Mengjie;YAN Yue’er;TANG Yi(Institute for Preservation and Conservation of Chinese Ancient Books,Fudan University Library,Fudan University,Shanghai 200433,China;Key Laboratory of Pulp and Paper Science and Technology(Qilu University of Technology),Ministry of Education/Shandong Province,Jinan 250353,China;Department of Chemistry,Fudan University,Shanghai 200433,China;Shanghai Institute of Quality Inspection and Technical Research,Shanghai 201114,China)

机构地区：[1]中华古籍保护研究院(复旦大学图书馆),上海200433 [2]制浆造纸科学与技术教育部/山东省重点实验室(齐鲁工业大学),山东济南250353 [3]复旦大学化学系,上海200433 [4]上海市质量监督检验技术研究院,上海201114

出　　处：《文物保护与考古科学》2019年第6期1-5,共5页Sciences of Conservation and Archaeology

基　　金：国家自然科学基金项目资助(21805042);国家市场监管总局科技计划项目资助(2017QK084);文化和旅游部文化行业标准化研究项目资助(WH/Y08-2018);制浆造纸科学与技术教育部/山东省重点实验室开放基金项目资助(KF201715);上海市科委扬帆计划项目资助(18YF1401400)

摘　　要：纸张纤维素的聚合度是影响纸张寿命及其力学性能的关键因素之一。手工纸纤维素聚合度的研究对确定古籍纸张年代和衡量修复纸质量均有重要意义。为此,本研究以皮纸、麻纸、竹纸和草纸中的迎春纸、苎麻纸、元书纸和龙须草纸为对象,研究了铜乙二胺(CED)法在手工纸检测中的适用性,并探讨了木素含量、溶解时间和空气对手工纸特性黏度的影响。研究发现,纤维素特性黏度和聚合度可按扣去木素含量的实际纤维素浓度计算获得,并且改良的CED法可用于木素含量低于10%的手工纸测试。纤维溶解过程可先使纸张纤维经水浸润2h,从而缩短CED溶解时间。此外,为防止纤维素的降解,在测试过程中应排除空气,以提高测试结果的准确性。The degree of polymerization of paper cellulose is one of the key factors affecting paper’s lifetime and mechanical properties. Research on the degree of polymerization of handmade paper is important for dating ancient paper and evaluating the quality of restoring paper. In our work, we used Yingchun, Zhuma, Yuanshu and Longxucao papers as the model substrates of mulberry bark, ramie, bamboo and Eulaliopsisbinata papers, respectively, to study the applicability of the copper ethylenediamine(CED) method for the detection of handmade paper, and to further investigate the effects of lignin content, dissolution time and the presence or absence of air on the intrinsic viscosity of paper. The results indicate that the CED method is suitable for the determination of handmade paper with a lignin content below 10%. The intrinsic viscosity and degree of polymerization of handmade paper can be calculated from the actual concentration of cellulose after subtracting the lignin content. In the dissolving process, paper should first be impregnated in water for 2 hours, which will shorten the dissolution time. In addition, air should be excluded during the test to prevent the degradation of cellulose and to improve the accuracy of testing results.

关 键 词：手工纸 铜乙二胺法 特性黏度 聚合度 木素含量 溶解时间 空气 

分 类 号：K876.9[历史地理—考古学及博物馆学]