使用粘度法预测宣纸类文物寿命的化学实验

The Use of Viscosity Method for Predicting the Life Expectancy of Xuan Paper-based Heritage Objects

本文设计了一个以小组合作形式开展使用粘度法预测纸质文物寿命的实验。本实验面向文物保护技术专业大三本科生开设,通过八个小组的协同合作,利用操作简单的夹套式粘度计测定两种类型宣纸老化前后的特性粘度并计算聚合度,汇总各小组数据后,使用Ekenstam方程计算纸张的老化速率常数,并结合阿伦尼乌斯公式预测宣纸寿命。旨在提高学生的团队合作能力以及动手实践、解决问题、数据分析与科学研究的能力,同时引导学生将化学知识应用到纸质文物保护实践工作中去。

An experiment designed to predict the lifetime of the Xuan paper using the viscosity method is introduced in the form of group collaboration.This experiment is targeted at junior students who majored in conservation of cultural relics,with eight groups involved.Using a jacketed viscometer,the intrinsic viscosity of the two types of undegraded and degraded Xuan papers was determined,and the corresponding degree of polymerization(DP)was calculated.Then data were collected from all groups,and degradation rates of the papers were then calculated,which were then used to predict the life expectancy of the Xuan papers.The aim was to enhance students’teamwork skills,practical experience,problem-solving abilities,data analysis,and scientific research capabilities,while also guiding them to apply their chemical knowledge to practical conservation for paper-based objects.