Bao Zuguo, Yan Yunxiang, Han Weijian
Key Laboratory for Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China.
Yangtze Delta Region Institute of Advanced Materials, Suzhou 215133, China.
Polymers (Basel). 2024 Nov 27;16(23):3332. doi: 10.3390/polym16233332.
Halloysite was successfully grafted with silane APTES using both wet and dry modification methods. Among them, wet modification using aqueous solution possessed the highest modification efficiency and grafting ratio. Morphological observations demonstrated that APTES grafting on halloysite improved both the filler dispersion and interfacial compatibility in polymer composites. The rheology and crystallization behavior indicated that silane modification improved the halloysite dispersion in the polypropylene (PP) matrix and enhanced the interfacial bonding. Furthermore, the modified halloysite also improved the thermal stability of the PP composites, showing elevated decomposition temperatures of PP. The mechanical properties of halloysite/PP nanocomposites were apparently improved with APTES modification. The filler content of the nanocomposites was finally optimized to 2% by considering trade-offs of the tensile, flexural, and Izod impact properties.
利用湿法和干法改性方法成功地将硅烷APTES接枝到埃洛石上。其中，使用水溶液的湿法改性具有最高的改性效率和接枝率。形态学观察表明，埃洛石上接枝APTES改善了聚合物复合材料中填料的分散性和界面相容性。流变学和结晶行为表明，硅烷改性改善了埃洛石在聚丙烯（PP）基体中的分散性，并增强了界面结合。此外，改性埃洛石还提高了PP复合材料的热稳定性，表现为PP的分解温度升高。APTES改性明显改善了埃洛石/PP纳米复合材料的力学性能。通过综合考虑拉伸、弯曲和悬臂梁冲击性能的权衡，最终将纳米复合材料的填料含量优化至2%。
