Abstract
Bamboo is a gramineous plant widely distributed in China and has great prospects. Normally, local people cut bamboo culm at first year for paper milling or at six years for construction. Understanding lignin changes in bamboo with aging is necessary for better exploring the application of bamboo at different ages and can also promote the application of bamboo more effectively. Based on the previous study, the chemical structure and the lignin content of bamboo at different ages were further explored by FT-IR, GPC, NMR and other chemical methods in this paper. Results showed that the lignin structures of bamboo at different ages were similar with three monomers of S, G and H, but the molecular weight increased with age. Quantitative structure estimation further confirmed that S-type lignin content and S/G ratio of bamboo lignin constantly increased with age.
Highlights
Bamboo belong to the Gramineae plant group, which is widely distributed in Asian countries [1].Due to the global shortage of forest resources, bamboo is considered the best plant species to replace wood because of its rapid growth, high tensile strength, good toughness and ductility [2]
The changes in contents of cellulose, hemicellulose and lignin were examined during the lignification of bamboo
Since the main purpose of this study was to investigate the change of bamboo lignin during lignification process, it was necessary to explore the relative proportion of
Summary
Due to the global shortage of forest resources, bamboo is considered the best plant species to replace wood because of its rapid growth, high tensile strength, good toughness and ductility [2]. The application of bamboo is mainly related to its secondary cell wall [5]. Compared with the secondary cell wall of wood, bamboo has a more obviously layered structure. The material properties of bamboo will not be affected by its high-speed growth. Characteristics of bamboo such as high mechanical strength, good toughness and ductility has attracted growing attention from scholars [6]. The main components of the secondary cell wall of Phyllostachys pubescens (bamboo) are cellulose, hemicellulose and lignin
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