Influence of lignin content in cellulose pulp on paper durability.

Influence of lignin content in cellulose pulp on paper durability.
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纤维素浆中木素含量对纸张耐久性的影响。

DOI:
10.1038/s41598-020-77101-2
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发表时间:
2020-11-17
期刊:
影响因子:
4.6
通讯作者:
Przybysz P
Przybysz P
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Małachowska E;Dubowik M;Boruszewski P;Łojewska J;Przybysz P

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宏观尺度上纸张降解的主要特征是泛黄、脆性增加以及由糖苷键水解和氧化反应引起的其他破坏性变化。到目前为止,木质素一直被认为是造成这些变化的原因。然而,当代分析尚未证实这一假设,并将纸的耐老化性低归因于酸化老化,因为在涉及硫酸铝的酸性环境中生产。鉴于人们普遍认为,本手稿介绍了在中性环境中生产的具有不同木质素含量的纸张的加速老化的研究。为了实现这一目标,使用色谱 (SEC) 和光谱(FTIR 和紫外-可见光谱)技术对湿度和温度增加条件下的人工老化纸张进行了研究。使用机械测试来确定样品拉伸性能的降低。我们观察到木质素含量对中性 pH 值下生产的纸张的老化速率没有影响。这项工作还揭示了光谱方法对于研究含有木质素的纸张的有用程度。
Paper degradation on a macroscopic scale is characterised primarily by yellowing, an increase in brittleness, and other destructive changes caused by the hydrolysis of glycoside bonds and oxidation reactions. Until now, lignin has been believed to cause these changes. However, contemporary analysis has not confirmed this assumption and has attributed low paper resistance to ageing with acidification owing to the production in acid environments that involve aluminium sulfate. In view of the common belief this manuscript presents studies on the accelerated ageing of papers with different lignin contents that are produced in neutral environments. To achieve the objective, artificially aged papers under conditions of increased humidity and temperature were investigated using chromatographic (SEC) and spectroscopic (FTIR and UV–Vis spectroscopy) techniques. Mechanical tests were used to determine the decrease in tensile properties of the samples. We observed no effects of the lignin content on the ageing rate of paper produced at neutral pH. This work also reveals the extent to which spectroscopic methods are useful for studying the papers containing lignin.
DOI: 10.1002/pol.1976.170140202
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