Comparative Study of the Durability of Two Types of Bamboo Papers Used for Restoration
In order to study the ability of two kinds of handmade bamboo paper to resist the action of environmental factors,maintain the original structure and physicochemical properties,and explore its durability,dry heat accelerated aging treatment was adopted,and the changes in the microscopic morphology and microstructure of the aging bamboo paper were observed based on the analyses of the ATR-FTIR spectra,tensile properties,wet tensile strength,pH value detection,ISO brightness,ultra-depth-of-field three-dimensional images,and scanning electron microscope images.Combining the papermaking techniques of two types of handmade bamboo paper,we discuss the correlation between the changes in the physical and chemical properties of aged bamboo paper and papermaking techniques,and explore the application scenarios of Liansi restoration paper.The results show that during the dry heat accelerated aging process,the intensity of the infrared absorption peaks of O—H,C—H,C—C and other groups inside the aging bamboo paper decreases gradually,and the intensity of the infrared absorption peaks of the C—O—C bond of glycosidic bond appears to be The phenomenon of first rise and then fall;the difference in tensile properties is mainly affected by the papermaking techniques,the advantage of Liansi restoration paper lies in the inter-fibre bond strength,and the advantage of Lianshi paper lies in the comprehensive performance;the phenomenon of dry hornification occurs in dry heat aging,plastic deformation occurring,limiting the fibre wetting and expanding;Liansi restoration paper is a weakly acidic paper,and Lianshi paper is an alkaline paper,and Lianshi paper is a better pH value stability.It is mainly affected by components such as CaCO3;increased carbonyl is the main causative factor for the yellowing of bamboo paper,and the difference in ISO brightness is caused by the difference in cooking agent and bleaching treatment;the super depth-of-field three-dimensional image shows that the inter-fibre bonding strength and the purity of fibre of Liansi restoration paper are higher than that of the Lianshi paper;the SEM image shows that the fibre porosity of bamboo paper decreases,and the characteristics of flattening,dry hornification,and laminating are highlighted,and in the late stage of aging,the surface of the long fibres is rough and peeling,and fine crumbs appear.
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