碳纳米管模板导向制备煤沥青基电热材料及其性能调控研究  

Facile preparation of pitch-derived carbon for high electrically conductive composites via carbon nanotube template

作　　者：郭君卓 雷智平[1] 闫洪雷 贾同鑫 杨雪 李占库 颜井冲 水恒福[1] 任世彪[1] 王知彩[1] 康士刚[1] GUO Junzhuo;LEI Zhiping;YAN Honglei;JIA Tongxin;YANG Xue;LI Zhanku;YAN Jingchong;SHUI Hengfu;REN Shibiao;WANG Zhicai;KANG Shigang(School of Chemistry&Chemical Engineering,Key Laboratory of Coal Clean Conversion and High Valued Utilization,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]安徽工业大学化学与化工学院煤清洁转化与高值化利用省重点实验室,安徽马鞍山243002

出　　处：《燃料化学学报（中英文）》2024年第3期405-412,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21878001,22078002,22108004,21978002,22008001)资助。

摘　　要：本研究以煤沥青为原料、多壁碳纳米管为结构导向剂,通过炭化制备了形貌和结构可控的煤沥青基碳膜,考察了多壁碳纳米管对导电填料结构及碳膜电热性能的影响规律。研究发现,多壁碳纳米管掺杂导致导电填料的晶格排列有序度增加、晶格间距减小和石墨化程度提高;多壁碳纳米管的引入提高了碳膜的载流子浓度,进而显著提高了其导电性。掺杂2%碳纳米管,可使煤沥青基碳膜的载流子浓度提高3.2倍、电阻降低67%;在5、10和15 V电压下,煤沥青基碳膜的发热温度分别可达44、88和165℃,相对未掺杂碳膜分别提高了7、22和70℃,显示出极大的应用前景。Coal pitch,a byproduct of coal coking,is an ideal precursor for preparing conductive carbon fillers because of its rich aromatics and high yield of carbonization products.In this paper,coal pitch-based carbon materials with controllable morphology and structure were prepared by carbonization using coal pitch and multi-walled carbon nanotubes as raw material and structure-directing agent,respectively.The effect of carbon nanotubes on the structure and electrothermal properties of carbon materials was investigated.The results show that the doping of multi-walled carbon nanotubes results in an increase in the lattice arrangement order,a decrease in lattice spacing,and an increase in graphitization degree of conductive fillers,which leads to a significant increase in the carrier concentration of the carbon film and thus its conductivity.The doping of 2%carbon nanotubes can increase the carrier concentration of coal pitch-based carbon film by 3.2 times and reduce the resistance of coal pitch-based carbon film by 67%.At 5,10 and 15 V,the heating temperature of the coal pitch-based carbon film can reach 44,88 and 165℃,respectively,which is enhanced 7,22 and 70℃compared with the undoped carbon film,showing great application prospect.

关 键 词：煤沥青 碳膜 碳纳米管模板 焦耳电热性能 

分 类 号：TQ530[化学工程—煤化学工程]