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通过静电吸附方法在玻璃纤维(GF)表面吸附粘土和成核剂,将改性玻璃纤维增强体与聚酰胺66(PA66)熔融共混制备高性能复合材料。通过扫描电子显微镜观察了粘土和成核剂在玻璃纤维表面的分散状态以及玻璃纤维与基体的界面连接。结果表明,在玻璃纤维表面静电吸附粘土和成核剂,不仅有助于粘土的分散,而且可以提高玻璃纤维与基体的界面连接。玻璃纤维表面吸附的粘土和成核剂可以诱导PA66分子链在纤维表面结晶,提高复合材料的力学性能。因此,与传统PA66/GF复合材料相比,在GF表面吸附少量的粘土(0.18wt%)和成核剂(0.07wt%)可以使复合材料的拉伸和弯曲模量分别提高12.2%和12.8%。
By adsorbing clay and nucleating agent on the surface of glass fiber (GF) by electrostatic adsorption, the modified glass fiber reinforced body was melt blended with polyamide 66 (PA66) to prepare high-performance composite material. The dispersion state of clay and nucleating agent on the surface of glass fiber and the interface between glass fiber and matrix were observed by scanning electron microscope. The results show that electrostatic adsorption of clay and nucleating agent on the surface of glass fiber not only contribute to the dispersion of clay, but also improve the interfacial connection between glass fiber and matrix. The clay and nucleating agent adsorbed on the glass fiber surface can induce the crystallization of PA66 molecular chain on the fiber surface and improve the mechanical properties of the composite. Therefore, the adsorption of a small amount of clay (0.18wt%) and nucleating agent (0.07wt%) on the GF surface can improve the tensile and flexural modulus of the composites by 12.2% and 12.8%, respectively, compared with the conventional PA66 / GF composites %.