以碳化温度为900℃的竹炭为导电骨料、酚醛树脂为黏结剂、炭黑为添加剂,采用模压成型法制备竹炭/酚醛树脂复合导电材料.考察了竹炭的粒度、酚醛树脂用量、炭黑用量、成型压力及固化温度等工艺因素对竹炭/酚醛树脂复合导电材料导电性和抗弯强度的影响.结果表明:随着酚醛树脂用量的增加,复合材料的抗弯强度增大,电导率先增大后减小;增加成型压力可同时提高复合材料的电导率和抗弯强度;增大竹炭粉粒的粒径、增加炭黑用量、提高同化温度有利于改善复合材料的导电性,但会不同程度地改变复合材料的力学性能.制备竹炭/酚醛树脂复合导电材料的最佳工艺条件为:竹炭粒度≤75/μm,树脂用量30%,炭黑用量7.5%,成型压力280 MPa,固化温度180℃.
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