Characterisation of 19th and 20th century Chinese paper
Characterisation of 19th and 20th century Chinese paper
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DOI：
10.1186/s40494-017-0158-x
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发表时间：
2017-11-24
期刊：
影响因子：
2.5
通讯作者：
Strlic, Matija
中科院分区：
文献类型：
--
作者：
Brown, Natalie;Lichtblau, Dirk;Strlic, Matija
用各种材料表征方法研究了19世纪和20世纪中国纸张的化学和物理性质。使用了1799年至1990年的178篇中国论文的参考资料，并确定了pH，聚合度（DP），木质素含量和拉伸强度（零跨度）等特性。大多数纸张的pH值接近中性，木质素含量低，DP与19世纪前的欧洲破布纸相似。研究发现高不均匀性和典型的纸张薄度对拉伸性能的影响，提出了一种改进的零跨度拉伸强度试验方法。使用近红外光谱（NIR），开发了概念验证偏最小二乘（PLS）应用程序，用于测定拉伸强度，pH值，DP和样品的测年。对于后者，使用1900年后的论文，交叉验证的误差为13年。使用线性判别分析（LDA）对木质素的存在进行建模，该模型可以区分高和低木质素含量，准确率为88%。使用一张或多张透射近红外光谱导致PLS结果类似的质量，这是由于材料的不均匀性。
The chemical and physical properties of 19th and 20th century Chinese papers were investigated using a variety of material characterisation methods. A reference collection of 178 Chinese papers, dating from 1799 to 1990 was used, and properties such as pH, degree of polymerisation (DP), lignin content, and tensile strength (zero-span) were determined. Most of the papers were of approximately neutral pH, had a low lignin content and DP similar to pre-19th century European rag paper. It was found that the high inhomogeneity and the typical paper thinness affected tensile testing and as a result, a modified method for zero-span tensile strength test was developed. Using near infrared spectroscopy (NIR), proof-of-concept partial least squares (PLS) applications were developed for determination of tensile strength, pH, DP and for dating of the samples. For the latter, using post-1900 papers, the error of cross validation was 13 years. The presence of lignin was modelled using linear discriminant analysis (LDA), where the model could distinguish between high and low lignin content with 88% accuracy. Using one or multiple sheets for transmission NIR spectroscopy led to PLS results of similar quality, which was attributed to material inhomogeneity.