本项目从高木质纤维含量木塑复合材料（WPC）的高效加工和高性能化出发，采用化学结合能力强、渗透性适中、表面覆盖效率高、无污染的烷基烯酮二聚体（AKD）和烯基琥珀酸酐（ASA）对竹粉进行表面化学改性，降低其表面能，改善其在聚丙烯（PP）基体中的分散性和相容性，提高WPC的加工性能和物理力学性能。重点研究改性参数和工艺的优化，建立高效、经济、环保的木质纤维表面改性方法，增韧改性PP以制备具有高流变性能又能与竹粉形成良好界面结合的改性PP，进而制备高竹粉含量WPC，并对其结构性能进行表征。研究表面改性对竹粉在室温和成型加工温度下表面能的影响，竹粉在PP中的三维分散与分布状态，最终揭示室温下，竹粉与PP的表面能特性与WPC力学性能的相关性，成型加工温度下表面能特性与WPC熔体流变/加工性能的相关性，为推动高木质纤维含量WPC的高效加工和高性能化探索新的途径，提供理论基础。

Starting from the efficient processing and high performance of highly filled wood-plastic composites (WPC), this project uses alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA) as surface modifiers with strong chemical binding capability, moderate permeability, high coverage efficiency, and non-pollution to modify bamboo flour. The purpose is to reduce the surface energy of bamboo flour, to improve its dispersibility in and compatibility with polypropylene (PP) matrix, and finally to enhance the processability and physical-mechanical properties of WPC. This study will concentrate on optimizing process parameters for bamboo flour modification, creating an efficient, cheap, and environmentally-friendly surface modification technique, toughening PP to achieve improved rheological properties and better compatibility with bamboo flour. The modified bamboo flour will be compounded with toughened PP to fabricate highly filled WPC. The structure and performance of the WPC will be characterized. The effect of surface modification with AKD and ASA on surface energy of bamboo flour will be studied at ambient and processing temperature, respectively. The three-dimensional dispersibility and distribution of bamboo flour in PP matrix will be investigated. At room temperature, correlation between the surface energy characteristics of bamboo flour and PP and the mechanical properties of WPC will be revealed, and at processing temperature, correlation between the surface energy characteristics of bamboo flour and PP and the rheological properties/processability of WPC melts will be revealed as well. This study could explore new ways and provide theoretical basis to promote the efficient processing and high performance of highly filled WPC.