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本文以硫铝酸盐水泥为基体材料,以改性后的碳纤维为功能导电组分,采用浇筑成型制备出碳纤维—水泥基导电复合材料,并对该种材料的力电性能进行了研究。扫描电子显微镜分析发现,改性后的碳纤维表面纤维层部分被腐蚀,并在表面出现了凹坑。能谱分析发现,改性后碳纤维表面成分中多了钾、钠、钙等元素。该复合材料的抗压强度随碳纤维的掺入量增加而增加。当掺入量为0.6%时,强度达到最大值。试样的电阻率随碳纤维掺入量增加而逐渐降低,当掺入量达到0.8%时,其电阻率达到最小值。其中,重铬酸钾改性后碳纤维的性能优于高锰酸钾改性后碳纤维的性能。
In this paper, the sulphoaluminate cement was used as the matrix material, the modified carbon fiber was used as the conductive component, and the carbon fiber-cement based conductive composites were prepared by pouring. The electromechanical properties of the composites were studied. Scanning electron microscopy analysis revealed that part of the modified carbon fiber surface fiber layer was eroded and pits appeared on the surface. EDS analysis found that the modified surface of carbon fiber more potassium, sodium, calcium and other elements. The compressive strength of the composites increases with the incorporation of carbon fibers. When the dosage is 0.6%, the intensity reaches the maximum value. The resistivity of the sample decreases with the increase of carbon fiber content, and reaches the minimum value when the content reaches 0.8%. Among them, potassium dichromate modified carbon fiber performance is better than potassium permanganate modified carbon fiber performance.