硅炭黑改性玄武岩纤维增强聚酰胺6复合材料性能

Performance of silica carbon black modified basalt fiber reinforced polyamide 6 composite

采用多巴胺(DOPA)溶液将硅炭黑(SiCB)分散在玄武岩纤维表面实现改性处理,提高玄武岩纤维(BF)与聚酰胺6(PA6)的界面结合性能。探究了不同SiCB含量对玄武岩纤维/聚酰胺6(BF/PA6)复合材料性能的影响。采用傅里叶红外光谱、差式扫描量热仪(DSC)和扫描电镜(SEM)对改性复合材料的微观形貌与结构进行表征,通过静力学测试对复合材料的断裂行为进行评估。SiCB的含量为2.0 g/L时,复合材料的拉伸强度和冲击强度分别提高了109.4%和89.3%。SEM结果表明,硅炭黑较好地均匀分散在BF表面,同时DCS结果表明,硅炭黑有效地降低了PA6的结晶焓,提高了PA6的结晶度。

In this study,first,basalt fiber surface was modified via silicon carbon black(SiCB)with dopamine(DOPA)solution to improve the interfacial bonding between basalt fiber and polyamide 6(PA6).Then,the effects of different SiCB contents on the properties of basalt fiber/polyamide 6 composites were investigated.The microscopic morphology and structure of the modified BF was characterized by Fourier transform infrared spectroscopy,differential scanning calorimetry(DSC)and scanning electron microscopy(SEM).The fracture behavior of the composite was evaluated by static testing.When the content of SiCB is 2.0 g/L,the tensile strength and impact strength of the composites are increased by 109.4%and 89.3%.SEM proves that the silica carbon black on the surface of BF is homogeneous.According to the DCS results,the silica carbon black effectively reduces the crystallization enthalpy of PA6 and improves the crystallinity of PA6.