In-situ dynamic observation on the gluing process of Moso bamboo cells.

Gaining a comprehensive understanding of the bonding characteristics of fibers and parenchyma cells in the gluing process is essential for understanding the formation of the bamboo gluing force and optimizing the bonding properties of bamboo. In this study, based on the bonding strength measured by gluing, a new in-situ dynamic observation method is employed to assess the bonding characteristics of fibers and parenchyma cells and examine their contribution to the bonding strength in bamboo. The glue primarily interacts with parenchyma cells and the lateral fibers of the fiber sheath during gluing. Glue nails and cross-linked interlocking structures are formed due to fibers and parenchyma cells' deformation during gluing. When compared with fibers, parenchyma cells have a complete reaction with glue, although at a slower rate. The correlation analysis indicated that the influence of cell deformation on bonding strength was more significant than that of chemical reactions, and the impact of parenchyma cells outweighed that of fibers. When the ratio of fiber and parenchyma cells is 37 % and 63 % in the bonding interface of Moso bamboo, which exhibits a higher bonding strength, this finding shed light on the contributions of fiber and parenchyma cells to bonding strength. [Display omitted] • The gluing process of bamboo cells was observed in-situ. • The deformation of cell on bonding strength is greater than chemical reaction. • The contribution of parenchyma cells to bonding strength is greater than fibers. [ABSTRACT FROM AUTHOR]