中文摘要：

利用多巴胺氧化自聚合可形成一层薄的强黏性复合层的特性，对聚对苯二甲酰对苯二胺（PPTA，对位芳纶）浆粕（AP）表面进行改性修饰，并对改性后的芳纶浆粕进行了X射线光电子能谱、扫描电子显微镜、热失重分析等表征。进一步以丁腈橡胶（NBR）为基体，研究了不同浓度多巴胺浸渍液处理的改性芳纶浆粕及其含量对增强NBR复合材料力学性能的影响。结果表明，聚多巴胺成功附着在AP表面，并在浸渍液质量浓度2．0g／L、浸渍时间24h的实验条件下，改性效果最佳。改性芳纶浆粕的热性能与改性前相比稍有所下降，但仍具有良好的热稳定性能。改性后AP与NBR界面黏结性能有所改善，并显著提高了复合材料的力学性能。

英文摘要：

Based on the strong adhesive polydopamine （PDA） films of dopamine （DOPA） oxidative self-polymerization on solid surface, AP were modified via dipping in a DOPA solution at room temperature, and the modified-AP （PDA/AP） were characterized by XPS, SEM and TG. The effects of DOPA concentration and PDA/AP content on the mechanical properties of PDA/AP composites with nitrile rubber （NBR） were investigated. The results confirm that PDA was deposited on the AP surface successfully. Under the reaction conditions of the concentrations at 2.0 g/L for 24 h, the modification effect is the best. The thermal properties of PDA/AP decrease slightly compared with AP, but it is still a promising pulp with good stability. The interface properties between PDA/AP and NBR improve, and the mechanical properties of PDA/AP reinforced NBR composites aldo improve significantly.