Effect of balloon-like structure on properties of bamboo pulp during beating process

作者：Dong, Daobin; Lei, Lirong^*; Hou, Yi; Liu, Chao

来源：Cellulose, 2023, 30(12): 7965-7980.

DOI：10.1007/s10570-023-05409-z

• Bamboo pulp
• Beating
• Fiber morphology
• Cell wall
• Balloon-like structure

The development of bamboo pulp has provided a solution for the pulp and paper industry to alleviate the shortage of forest resources. Bamboo pulp exhibits different properties from softwood pulp during the beating process, necessitating a deeper understanding of the morphological behavior of bamboo fibers to comprehend its beating characteristics. In this work, the fiber morphology and ultrastructure of kraft bamboo pulp were observed to investigate the special structure of bamboo fiber formation in the beating process. Bamboo fibers formed balloon-like structures at the collars of non-beaten fiber during the beating process, which resulted in the rapid shortening of the fiber in the early stage of beating due to strong shear force and transverse expansion. The formation of balloon-like structure was related to the multilayered structure of bamboo fiber, wherein each layer exhibited varying microfibril angles (MFA). The broad layer with a small MFA swelling results in an interlayer gap, which weakens the bonding force between the layers of bamboo fibers during beating and leads to flake peeling of the outer cell wall. Therefore, studying the formation mechanism and evolution of balloon-like structure is of great significance to the optimization of the beating process of bamboo pulps.

• 单位
  南京林业大学