Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (1): 181-187.doi: 10.13229/j.cnki.jdxbgxb20190967

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

Yi LI(),Dong-di HUANG,Kai-feng YU(),Ji-cai LIANG,Xiao-ling HE,Xi-tong REN   

  1. College of Materials Science and Engineering，Jilin University，Changchun 130022，China
  • Received:2019-05-24 Online:2021-01-01 Published:2021-01-20
  • Contact: Kai-feng YU E-mail:henrylee@jlu.edu.cn;yukf@jlu.edu.cn

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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

CLC Number: 

  • TQ327.9

Fig.1

Experiment of basalt fiber modification process"

Fig.2

FT-IR spectra of DOPA BF and MBF"

Fig.3

Apparent shear viscosity of composites black"

Fig.4

Standard specimen for tensile test and diagrams for tensile strength and impact strength"

Table 1

DSC parameters of PA6 and its composites"

材料

结晶温度

/℃

结晶焓

/(J·g-1)

熔融温度

/℃

熔融焓

/(J·g-1)

PA6182.8102.9219.298.6
0.5SiCB/BF/PA6181.581.23220.1109.6
1.0SiCB/BF/PA6180.878.93219.0103.2
1.5SiCB/BF/PA6178.582.33220.4105.3
2.0SiCB/BF/PA6178.374.02219.8102.6
2.5SiCB/BF/PA6178.089.54220.3100.8

Fig.5

Crystallization curve and melting curveof PA6 and its composites"

Fig.6

SEM observation of BF coated with different concentrations of silicon carbon"

Fig.7

SEM micrographs of the tensile-fractured surfaces"

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