硅烷偶联剂对玄武岩织物拉伸性能的影响

试验使用不同浓度的硅烷偶联剂KH - 550对玄武岩纤维织物进行表面改性处理,采用Instron 3369型万能强力机测试了处理前后试样的拉伸性能,期望得出最佳的偶联剂浓度；利用FEI QUANTA200型扫描电子显微镜观察处理前后的玄武岩纤维表面形态,从微观角度分析KH - 550对玄武岩纤维的改性机理.结论是:当KH - 550的浓度为0.75％时,拉伸强度和弹性模量达到最大；观察处理前后的玄武岩纤维表面形态看出,KH - 550与玄武岩纤维发生偶联反应,附着在纤维表面形成一层薄膜,使其表面变得凹凸粗糙,有利于改善玄武岩长丝与有机聚合物间的界面黏结状况.表明采用KH - 550对玄武岩纤维织物进行表面改性处理,可以改善其表面,同时不损伤拉伸性能.

The effect of silane coupling agent treatment on tensile property of basalt fiber fabric

In order to discuss the effect of silane coupling agent treatment on the tensile property of the basalt fiber fabric,different concentrations of silane coupling agent KH-550 were used to modify the fabric surface,hoping to reach to an optimal concentration.An Instron-based 3369 multi-function tester was used to test the tensile property of non-finished and finished samples.FEI QUANTA200 scanning electron microscope was used to observe the surface morphology of the basalt fiber with the mechanism analyzed from the microscopic view.It is concluded that: when the concentration is 0.75%,the fabric tensile strength and modulus reached to the best.It can see,by observing the surface morphology of basalt fiber treated and untreated,that the silance coupling agent KH-550 reacted with basalt fiber and adhered to its surface,forming diaghragm and making its surface rough and concave-convex,which improved the bonding between basalt fibers and organic polymers.It shows that the basalt fiber fabric surface can be modified by silane coupling agent KH-550 with no damage of tensile strength and elongation of single basalt filament.