多巴胺改性对位芳纶浆粕及其增强橡胶复合材料的性能研究  

Research on Properties of Aramid-Pulp Modified with Dopamine Reinforced Nitrile Rubber Composites

作　　者：王涛[1] 秦明林[1] 刘静[1] 李会[1] 顾灏[1] 滕翠青[1] 余木火[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,东华大学材料科学与工程学院,上海201620

出　　处：《塑料工业》2016年第3期151-156,共6页China Plastics Industry

基　　金：国家重点基础研究发展计划(2011CB606100)

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2.0 g/L、浸渍时间24 h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。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.

关 键 词：对位芳纶浆粕 多巴胺 表面改性 丁腈橡胶 复合材料 力学性能 

分 类 号：TQ333.7[化学工程—橡胶工业] TQ342