【摘要】 以固态环氧树脂(EP)粉与石墨(G)粉混合物为原料,通过低温热压烧结制得一种双极板材料。研究了EP/G复合材料的弯曲强度和电导率随环氧树脂含量、模压温度和保温时间的影响变化。结果表明:随着环氧树脂含量的增加,EP/G复合材料的弯曲强度呈先上升后下降趋势,在EP含量为10%(质量分数)时达到最大,而电导率呈下降趋势;随模压温度的升高,EP/G复合材料的弯曲强度逐渐变大,电导率则先增长后降低;随着保温时间的延长,EP/G复合材料的弯曲强度和电导率都呈现先增长后降低的变化趋势;环氧树脂含量为10%质量分数,模压温度为275℃,保温时间为100min时,所得复合材料弯曲强度为53.11MPa,电导率达到209.25S/cm。更多还原

【Abstract】 A kind of material of the bipolar plate was fabricated by the hot-pressure molding using epoxy (EP) resin powders and graphite powders as raw materials. The factors including the EP resin content, the molding temperature and the holding time which affects the conductivity and bending strength of the composite were investigated.The results indicate that the bending strength increases at first and then decreases and conductivity decreases with the increasing of EP resin content, the bending strength increased and conductivity would increase firstly and then decreased with the increasing of molding temperature, the bending strength and conductivity both increased firstly and then decreased with the increasing of holding time. The flexural strength was 53.11 MPa and conductivity was 209.25 S/cm of the EP/G composite,as EP resin content of 10 wt%, molding temperature of 275 ℃ and holding time of 100 min.更多还原