In this study, we investigate the chemical, physical and optical properties of cellulose paper irradiated by an electron beam for disinfection. Cellulose chain scission and oxidation induced by radiation increased considerably at 25 kGy irradiation, whereas folding endurance, morphology, and crystallinity did not undergo significant changes. The cellulose chain scission rate of paper irradiated under air-dried and wet conditions showed no difference; however, cellulose oxidation increased to a higher degree in paper irradiated under wet conditions than under air-dried conditions. Electron beam irradiation did not significantly affect changes in paper color, which is associated with oxidation. However, when irradiated papers were aged, the color difference increased according to the irradiation dose, as the oxidized functional groups of cellulose can act as a trigger for color change. A linear relationship between the cellulose chain scission rate and irradiation dose was found; thus, the cellulose chain scission rate can be predicted for a specific dose. The degree of polymerization was calculated from the predicted cellulose chain scission rate using the Ekenstam equation. According to the prediction, the degree of polymerization decreased to 74% at a dose of 5 kGy, a suitable dose for paper disinfection. In the low-dose range, electron beam irradiation did not adversely affect the physical properties of paper, but significant changes occurred in both the chemical and optical properties of paper. Thus, electron beam irradiation may be of use in disinfecting severely degraded paper due to biological factors; however, the irradiation process diminishes paper permanence.

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中文翻译：

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电子束辐照对纤维素纸降解的影响

在这项研究中，我们研究了用电子束辐照进行消毒的纤维素纸的化学，物理和光学性质。辐射诱导的纤维素链断裂和氧化在25 kGy辐射下显着增加，而耐折性，形态和结晶度没有明显变化。在风干和湿润条件下辐照的纸的纤维素断链率没有差异。但是，在湿润条件下辐照的纸张中纤维素氧化的程度要比在风干条件下升高。电子束辐照不会显着影响与氧化有关的纸张颜色变化。但是，当将被辐照的纸张老化时，色差会随着辐照剂量的增加而增加，因为纤维素的氧化官能团可以触发颜色变化。发现纤维素断链率与辐照剂量之间存在线性关系。因此，可以预测特定剂量下的纤维素断链率。使用Ekenstam方程由预测的纤维素断链速率计算聚合度。根据预测，以5 kGy的剂量（纸张消毒的合适剂量），聚合度降低到74％。在低剂量范围内，电子束辐照不会对纸张的物理性质产生不利影响，但是纸张的化学和光学性质都会发生重大变化。因此，由于生物因素，电子束辐照可用于对严重降解的纸张进行消毒。然而，

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