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Aging behavior occurs in the storage process of paper archives, which accelerates the aging process of the paper. Therefore, it is important for paper archives management to explore the aging behavior of acidified paper (AP) and to delay or prevent its further aging. The aging behavior of the commonly used university archives paper with artificial acidification were studied by measuring pH value, electrical conductivity, mechanical properties and whiteness. The results show that the pH value, conductivity, mechanical properties and whiteness of AP change significantly compared with the non-acidified raw paper (P). After dry-heat aging treatment, the pH value of AP decreased more obviously than P, which shows more obvious aging degradation and further acidification of AP. During the aging process of AP, the molecular and structural degradation are promoted by the presence of acidic substances, which increase the electrical conductivity of the system. The microstructures of the paper are changed by acidification and aging treatment, and more fiber fracture, etching and microscopic holes are found in the surface SEM images. The reductions of the tensile index and whiteness of AP are also more significant because of the degradation acceleration of the acid. [ABSTRACT FROM AUTHOR]

The aging and acidification behavior of paper archives affect their long-term preservation. Therefore, delaying or preventing aging and acidification has become an important topic in the field of paper archives management. the aging and acidification behavior of commercial archival paper were studied by measuring pH value, electrical conductivity, mechanical properties and whiteness in this work. The results show that the aging and acidification phenomena are obvious after dry-heat aging treatment. The molecular degradation of cellulose, hemicellulose, lignin and other components results in the decrease of pH value of the system, which decrease with the increase of the treatment temperature and time. The electrical conductivity of the system increases because of the molecular degradation and structural degradation, and with the increase of the treatment temperature and time, the electrical conductivity increases more significantly. After aging treatment, the paper appears etching and increasing microcosmic pores. With the occurrence of molecular degradation and structural degradation, the tensile index and whiteness of the paper decrease, and with the increase of the treatment temperature and time, the tensile index and whiteness decrease more significantly. [ABSTRACT FROM AUTHOR]