作　　者： (张新荔）; (吴义强）; (胡云楚）;

机构地区： 中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处： 《中南林业科技大学学报》 2017年第8期114-121,共8页

摘　　要： 为开发生物质导电材料,以木质素为原料,氯化铁为催化剂,通过热解炭化工艺制备木质素炭,并利用响应面法对影响炭产率的4个主要因素即载气流量、升温速率、炭化温度、炭化时间进行了优化。研究结果表明,利用Design-Expert软件的Box-Behnken设计建立的二次多项式模型较显著,当载气流量为1.26 L/min,升温速率为20℃/min,炭化温度为700℃,炭化时间为60 min时,炭产率达到最大值46.04%,与实际值45.86%较为接近,说明优化结果可信。洗涤处理后的木质素炭呈片层堆积状,其结构类似于石墨微晶炭,电阻率为0.353Ω·cm。 In order to produce biomass conductive materials, a kind of conductive charcoal was prepared by pyrolysis carbonization of lignin with ferric chloride as catalyst. Four main factors affecting the yield of charcoal, namely the flow rate of carrier gas, heating rate, carbonization temperature, and time were optimized by response surface methodology. Experimental results showed that the quadratic polynomial model based on the Box-Bohnken design of Design Expert software was significant, the maximum yield of charcoal was 46.04% at the carrier gas flow rate of 1.26 L/min, heating rate of 20 ℃/min, carbonization temperature of 700 ℃, and carbonization time at 60 min, which was close to the actual yield of 45.86%, indicating the optimal conditions was credible. The structure of conductive charcoal treated with washing was stacked sheet-like, graphite-like microcrystalline carbon, and its resistivity was 0.353 Ω·cm.

关 键 词： 木质素 炭化 电阻率 响应面