One- and four-year-old Moso bamboo materials were selected as the research objects. X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and solid-state cross-polarization magic angle spinning C nuclear magnetic resonance (NMR) were used to analyze the samples’ chemical properties and compositions of Moso bamboo samples. The relative amounts of cellulose and hemicellulose were higher in one-year-old Moso bamboo than in four-year-old, but the latter Moso bamboo had higher relative lignin levels. The relative amounts of guaiacyl and syringyl propane units (G and S), and the S/G ratio were higher in the lignin of four years old bamboo samples was than one-year-old bamboo, and the S/G ratio was larger in four-year-old bamboo samples. The relative content of hydroxyphenyl propane units (H) was lower in four-year-old Moso bamboo than in one-year-old bamboo. There was a higher proportion of β-O-4 structures in the lignin of four-year-old bamboo. The cellulose crystallinity showed that the four-year-old bamboo sample had higher crystallinity than the one-year-old bamboo sample, and the relative content of Iα was higher in the four-year-old bamboo samples, but the relative content of Iβ was lower in the four years old bamboo samples, indicating a transformation from Iβ to Iα. This examination of the chemical characteristics of Moso bamboo materials at various ages will help build a theoretical foundation for the sane and effective use of Moso bamboo can be developed by examining the chemical characteristics of the material at various ages.

中文翻译：

---

不同龄期毛竹化学性质的综合光谱分析


选取一、四年生的毛竹材料作为研究对象。采用X射线光电子能谱（XPS）、傅里叶变换红外光谱（FTIR）、拉曼光谱和固态交叉偏振魔角旋转核磁共振（NMR）分析样品的化学性质和成分毛竹样品。一年生毛竹的纤维素和半纤维素相对含量高于四年生毛竹，但后者的相对木质素水平较高。四年生竹样品木质素中愈创木基和紫丁香基丙烷单元（G和S）的相对含量和S/G比高于一年生竹，且S/G比更大。四年生竹子样本。四年生毛竹的羟苯基丙烷单元（H）相对含量低于一年生毛竹。四年生竹子的木质素中β-O-4结构的比例较高。纤维素结晶度显示，四年生竹样品的结晶度高于一年生竹样品，四年生竹样品中Iα的相对含量较高，但Iβ的相对含量四年生竹子样品中的值较低，表明从 Iβ 到 Iα 的转变。通过对不同龄期毛竹材料化学特性的检测，将为毛竹的合理、有效利用奠定理论基础。