硅炭黑改性玄武岩纤维增强聚酰胺6复合材料性能

doi:10.13229/j.cnki.jdxbgxb20190967

摘要/Abstract

摘要：

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。

关键词: 复合材料, 玄武岩纤维, 硅炭黑, 改性处理, 拉伸强度

Abstract:

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.

Key words: composite material, basalt fiber, silicon carbon black, modification treatment, tensile strength

中图分类号:

TQ327.9

李义,黄东迪,于开锋,梁继才,何小玲,任希彤. 硅炭黑改性玄武岩纤维增强聚酰胺6复合材料性能[J]. 吉林大学学报(工学版), 2021, 51(1): 181-187.

Yi LI,Dong-di HUANG,Kai-feng YU,Ji-cai LIANG,Xiao-ling HE,Xi-tong REN. Performance of silica carbon black modified basalt fiber reinforced polyamide 6 composite[J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 181-187.

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材料	结晶温度 /℃	结晶焓 /(J·g^-1)	熔融温度 /℃	熔融焓 /(J·g^-1)
PA6	182.8	102.9	219.2	98.6
0.5SiCB/BF/PA6	181.5	81.23	220.1	109.6
1.0SiCB/BF/PA6	180.8	78.93	219.0	103.2
1.5SiCB/BF/PA6	178.5	82.33	220.4	105.3
2.0SiCB/BF/PA6	178.3	74.02	219.8	102.6
2.5SiCB/BF/PA6	178.0	89.54	220.3	100.8