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Paper cultural relics, as the carriers of human civilization, inevitably deteriorate during the long-term storage. The restoration of those damaged or aged paper cultural relics is an important part of cultural relics protection. How to obtain the fiber with high permanence property is the key to the repair paper used to cultural relic restoration. Herein, in order to obtain high permanence lignocellulosic fiber, nano-CaCO 3  was introduced inside the Wikstroemia bast fiber by  in-situ  mineralization. Under accelerated aging condition, the microstructure, chemical structure, crystallinity, degree of polymerization, variation of pH, alkali reserve and mechanical strength of the fiber before and after mineralization were studied. The results showed that nano-CaCO 3  had no obvious effect on the properties of paper prepared from those mineralized fibers, but it can effectively neutralize the acid generated inside the fiber, slow down the degradation rate of cellulose and improve the permanence of the paper during the aging process. It provides a new insight for the manufacture of repair paper for cultural relics restoration.

Effect of in-situ mineralization of calcium carbonate on the aging resistance of Wikstroemia bast fiber