Effects of NO2 and acetic acid on the stability of historic paper

Effects of NO2 and acetic acid on the stability of historic paper
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NO2和乙酸对古纸稳定性的影响

DOI:
10.1007/s10570-014-0374-4
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发表时间:
2014
期刊:
影响因子:
5.7
通讯作者:
Menart E
Menart E
中科院分区:
材料科学2区
文献类型:
--
作者:
Menart E

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本研究探讨了历史纸在污染环境中长期黑暗储存过程中的降解。在一个创新的实验中,使用一套真实的历史文件,将现实污染水平下的降解速率与无污染情况下的降解速率进行比较。考虑到后工业环境中储存库中最丰富的污染物:乙酸和二氧化氮。根据“处理”(通过聚合度降低定义)和“显示”(通过变色定义)寿命的减少来评估它们的作用。外推到室内条件,使寿命预测的条件下,相当于一个真实的档案或图书馆储存库环境,而预测的不确定性进行了分析评估,以评估结论的意义。虽然10 ppb的NO2确实会减少几乎所有类型的纸张的使用寿命,但它们的预期寿命仍然被评估为数千年,酸性纸张除外。在档案馆和图书馆储存库的典型浓度(<100 ppb)下,乙酸的影响明显小于NO2,但不会影响显示寿命。从保护管理的角度来看,它需要解决的是,在其他方面显着的处理寿命的预测减少是否是真实的关注,以及是否在档案馆和图书馆储存库的空气过滤是合理的。
This research investigates degradation of historic paper in polluted environments during long-term dark storage. In an innovative experiment, degradation rates at realistic pollution levels are compared with degradation rates in the absence of pollution, using a set of real historic papers. The most abundant pollutants in repositories in post-industrial environments are taken into account: acetic acid and nitrogen dioxide. Their action was assessed in terms of reduction of ‘handling’ (as defined by decrease in degree of polymerisation) and ‘display’ (as defined by discolouration) lifetimes. Extrapolations to room conditions enabled lifetime predictions in conditions that are comparable to a real archival or library repository environments while prediction uncertainties were analytically evaluated to assess the significance of conclusions. While 10 ppb of NO2does reduce the handling lifetime of almost all types of paper, their predicted lifetimes were still assessed to be several millennia, with the exception of acidic paper. Acetic acid at concentrations that are typical for archival and library repositories (<100 ppb) has significantly less effect than NO2while it does not affect display lifetimes. From a conservation management perspective, it needs to be addressed whether the predicted reductions in otherwise significant handling lifetimes are of real concern and whether air filtration in archival and library repositories is justified.
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