金属共掺杂对树脂炭结构及抗氧化性能的影响  

Effect of Metal Co-doping on Microstructure and Oxidation Resistance of Carbon Derived from Phenol Resin

作　　者：汪贤[1] 朱伯铨[1] 李享成[1] 马铮 魏莹 

机构地区：[1]武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉430081 [2]浙江自立股份有限公司,浙江上虞312300 [3]山东圣泉化工股份有限公司,山东章丘250204

出　　处：《硅酸盐学报》2015年第3期316-321,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51174152);国家"973"计划(2012CB722702);湖北省自然科学基金重点项目(2014CFA091)资助

摘　　要：以热固性酚醛树脂和金属铝粉为原料、纳米镍为催化剂,采用机械搅拌法制备了金属铝和纳米镍共掺杂酚醛树脂,研究了金属铝和纳米镍共掺杂对树脂炭结构及其抗氧化性能的影响。结果表明:在埋炭气氛下,树脂材料内部CO分压较高而无氮化物存在,体系属于Al-C-O系统;随着温度的升高,氧分压增大,Al2O3(s)相的稳定区间增大。900℃炭化后体系中生成纳米碳管和Al3C4晶须,1 000℃处理后有Al3C4晶须和Al2O3颗粒同时存在。当温度升高到1 200℃时,Al3C4相消失,Al2O3晶须生成量增加。随着热处理温度升高,纳米碳管的直径从60 nm增大到100 nm。添加金属铝粉和纳米镍后,掺杂改性树脂炭化后炭产物的氧化峰值为664.6℃,相比单一掺杂,氧化峰值温度提高了约122℃,增幅达到22%。Co-doping phenol resin samples with Al and Ni nanopowder were prepared via a stirring method. Effects of Al and Ni nanopowder on the microstructure and oxidation resistance of the carbon derived from phenol resin were investigated. According to the thermodynamic analysis, there are no nitrogen-containing phases in the reducing atmosphere at a high pressure of CO, and the system belongs to Al-C-O ternary. The predominance is Al2O3 phase, which increases with increasing the temperature and O2 pressure. The experimental results reveal that carbon nanotubes(CNT) and Al3C4 whiskers coexist at 900 ℃. At 1 000 ℃, there are Al3C4 whiskers and Al2O3 particles. Al3C4 phase disappears and the Al3O2 whiskers increase when temperature increases to 1 200 ℃. The diameter of CNT increases from 60 nm to 100 nm with increasing the temperature. The maximum oxidation temperature for the resultant carbon derived from this modified phenol resin is 664.6 ℃, which is increased by 22% for sole doping of Ni nanopowder in resin.

关 键 词：共掺杂 酚醛树脂 纳米碳管 抗氧化性 

分 类 号：TM215.1[一般工业技术—材料科学与工程]