(NH_4)_2HPO_4浸渍处理对碳布性能与结构的影响  

Effect of(NH_4)_2HPO_4 impregnation on the structure and performance of carbon cloth

作　　者：李雅东[1] 张学军[1] 田艳红[1] 王素卿[1] 李晨[1] 沈曾民[1] 

机构地区：[1]北京化工大学有机-无机复合材料国家重点实验室,北京100029

出　　处：《功能材料》2013年第3期371-375,共5页Journal of Functional Materials

摘　　要：以人造棉布为原料,经(NH4)2HPO4浸渍后炭化、石墨化处理制备柔性的碳布材料。研究了浸渍液对人造棉布炭化历程的影响,以及碳布收率、电阻率、拉伸强度、断裂伸长率的变化规律。结果表明,经过(NH4)2HPO4的浸渍,碳布的炭化收率从11.3%提高到31.3%;电阻率有明显下降,石墨化后碳布的电阻率降为0.068Ω.cm;断裂伸长率为14.7%。同时具有良好的透气性能和一定的强度,可用于燃料电池气体扩散层材料。Man-made cotton cloth was used as raw material to prepare flexible carbon cloth.After impregnation in（NH4）2HPO4 solution,cotton cloth was carbonized and then graphitized.The influence of impregnation solution on the carbonization of cotton cloth was investigated.The change pattern of yield,electrical resistivity,tensile strength and elongation at break was studied.It was found that after impregnation in（NH4）2HPO4,the yield of carbon cloth was raised from 11.3% to 31.3%.The electrical resistivity dropped remarkably,which was 0.068Ω·cm after graphitization.The elongation at break was 14.7%.The prepared carbon cloth at the same time had relatively good permeability and strength,which was appealing for application in gas diffusion layer materials of fuel cell.

关 键 词：人造棉布 碳布 电阻率 断裂伸长率 燃料电池 

分 类 号：TB34[一般工业技术—材料科学与工程]