Polyamide 6 (PA6) composite is a thermoplastic composite with potential application prospects; however, its low interfacial compatibility leads to poor toughness and flame retardancy. In this study, a new bamboo charcoal (BC)-PA composite material was prepared by injection molding with BC as inorganic filler and four auxiliaries. Analysis of various properties of the composite material indicates that the addition of additives improves the interfacial compatibility between BC and PA6, as a result, PA6 displays significantly improved toughness and flame retardancy under the premise of maintaining excellent mechanical strength, which improves the overall performance of the composite material. The lanthanide rare-earth nucleating agent WBG-II and the hardening nucleating agent WNA108 enhanced the thermal stability and dimensional stability of the composite. Additionally, the inorganic powder surface modifier WOT108 and the processing modifier WAC802 improved the dispersion and wettability of bamboo charcoal (BC). Collectively, these additives increased the interfacial compatibility and bonding strength of the composite system. Compared with pure PA6, the tensile strength, bending strength, and impact strength of the composite increased by 51–57 %, 76–82 %, and 12–28 %, respectively. Simultaneously, the addition of additives and BC could promote the formation of carbon layer in the combustion process, block the transfer of heat and combustible gas, and improve the flame retardancy of the composite. Therefore, this integrated modification and enhancement method of BC and auxiliaries provides a simple and efficient strategy for expanding the application prospects of engineering plastic PA6 in the field of high value-added engineering structural materials.

中文翻译：

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多种助剂改性竹炭增强聚酰胺6复合材料的制备：协同效应与界面改进


聚酰胺 6 （PA6） 复合材料是一种具有潜在应用前景的热塑性复合材料;然而，其低界面相容性导致韧性和阻燃性差。本研究以 BC 为无机填料和 4 种助剂，通过注射成型制备了一种新的竹炭 （BC）-PA 复合材料。对复合材料各种性能的分析表明，添加剂的添加提高了 BC 和 PA6 之间的界面相容性，因此，PA6 在保持优异机械强度的前提下表现出显著提高的韧性和阻燃性，从而提高了复合材料的整体性能。镧系元素稀土成核剂 WBG-II 和硬化成核剂 WNA108 增强了复合材料的热稳定性和尺寸稳定性。此外，无机粉末表面改性剂 WOT108 和加工改性剂 WAC802 改善了竹炭 （BC） 的分散性和润湿性。总的来说，这些添加剂提高了复合系统的界面相容性和粘合强度。与纯 PA6 相比，复合材料的拉伸强度、弯曲强度和冲击强度分别提高了 51-57 %、76-82 % 和 12-28 %。同时，添加剂和BC的添加可以促进燃烧过程中碳层的形成，阻断热量和可燃气体的传递，提高复合材料的阻燃性。因此，这种BC与助剂的集成改性和增强方法为拓展工程塑料PA6在高附加值工程结构材料领域的应用前景提供了一种简单高效的策略。