为了从分子水平解析木制品在使用过程中因环境温度和湿度变化导致的开裂变形问题，本项目根据细胞壁主化学成分复合模型（木素半纤维素为基体相、纤维素为增强相的复合体），以木材主分子链的聚集态为研究对象，借助NMR、AFM、XRD、FTIR、DMA、微力学测试仪等现代测试手段和材料分析软件，应用统计热力学、界面热力学、界面结构力学和复合材料结构模拟等方法对不同热湿条件下木材细胞壁内纤维素分子链聚集态、Matrix分子团聚集态及纤维素-Matrix复合体聚集态的变化进行测试、分析和计算，推演不同热湿条件下木材细胞壁中纤维素分子链的晶态及取向结构、Matrix分子团的织态结构和纤维素－Matrix复合体界面结构的变化机制，探明不同热湿条件下细胞壁主分子链聚集态结构与木材粘弹性能之间的变化协调关系，丰富木材细胞壁力学基础理论，为解决木材开裂变形问题及功能化利用提供理论支持。

In order to interpret crack and deformation of wood products at molecules for surrounding changing of temperature and humidity, the main macromolecular chains aggregation, which includes aggregation states of cellulose chains, matrix (complex of semi-cellulose macromolecules and lignin macromolecules) and composite of cellulose and matrix will be tested at the varying states of heat and moisture.using professional software and modern instruments such as NMR, AFM, XRD, FTIR, DMA, Micromechanical equipment, etc. The testing depends on chemical model of cell-wall structure, which cellulose chains are enhancing phase and the complex of semi-cellulose macromolecules and lignin macromolecules is matrix phase. The testing dates will be calculated and analyzed with statistic thermodynamics, Interfacial thermodynamics, interfacial mechanics and computational models. The structure, which includes crystalline state and conformation of cellulose chains, textures of matrix and interface between cellulose chains and matrix, will be inferred. The influence factors will be discovered such as conformation of cellulose chains, chemical shift of elements in matrix and interface active energy between chains of cellulose and matrix. And then the changing principle of viscoelasticity of wood materials with will be explosed at the varying states of heat and moisture, which coordinates with aggregation changing of main molecular chains in cell-wall. This researching will enrich fundamental theories of wood cell-wall mechanics, provide theoretical support for solving crack and deformation of wood products and improve functional utilization to wood materials.