A Study on the Adhesive Materials Used in the Restoration of Palm Leaf Manuscripts
It is a global challenge to restore palm leaf manuscripts,with the primary issue being the selection of appropriate restoration materials.This study involved an analysis and comparison of various properties of traditional adhesives in order to identify the most suitable adhesive for repairing palm leaf manuscripts.Initially,rotational viscometer and rheometer were used to analyze the viscosities of different traditional adhesives,with a focus on those with high viscosity.Subsequently,texture analyzer was employed to test the viscosity,adhesion force,and peel strength after binding the adhesives with palm leaf manuscripts.Concurrently,DFT specific surface area method was utilized to measure the pore size of the palm leaf manuscripts,while laser particle size analyzer was used to analyze the particle size of the adhesives.Additionally,scanning electron microscope-energy spectrometer was employed to examine both morphological structure of the palm leaves and their bonding with adhesive.The findings indicated that 10%-20%starch glue,2%guar gum,2%CMC sodium,and Gymnadenia conopsea glue could be effectively utilized for repairing palm leaf manuscripts based on their specific conditions.Furthermore it was observed that while pore size of palm leaf is nano-sized;particle size of adhesive is micron-sized resulting in superficial rather than penetrative bonding which poses a risk of shedding.Therefore further research into bond strength between adhesive and palm leaf is necessary.Finally,this paper simulated typical diseases found in palm leaf manuscripts and conducted trial repair experiments using selected adhesive along with Yunnan contemporary palm leaves as repair materials.
palm leaf manuscriptscultural relic restorationadhesivematerial propertiesadhesion force