摘要
以树脂为碳质前躯体通过聚合诱导相分离热解法制备了介孔碳单体,着重分析了热裂解对碳单体孔形态以及相结构的影响。结果表明,热裂解的影响可分为2个阶段:具有一定有序态结构的聚合物开始热裂解形成类石墨的片层结构阶段,除了孔径和孔壁稍有收缩,碳单体的组织形貌较好的继承了热裂解前的组织形貌;石墨化程度加深阶段,碳单体平均孔径随热裂解温度上升稍有增加。热裂解后不同工艺条件下制得的碳单体的孔隙度呈不同程度的减小,减小率在3.6%～48.1%之间。相对于固化温度,热裂解对不同固化催化剂含量下制得的碳单体孔隙度的影响更显著。
Mesoporous carbon monoliths have been fabricated by a technology of polymerization-induced phase separation and pyrolysis,emphasizing on analysis of variation in pore properties and phase structure of mesoporous carbon monoliths before/after pyrolysis.The result showed that the effect of pyrolysis on pore properties and phase structure of carbon monoliths include two stages.At the first stage,polymer with ordered structure begun to be transformed into glassy carbon,which consists of the crystalline stacks with graphite structure.The morphology of carbon monoliths mostly inherited that of monolith before pyrolysis,except that shrinkage of the size of pore and skeleton in monolith to the degree.At the second stage,the crystalline stacked with graphite structure in the glassy carbon were growing-up and ordering with increased temperature,and the pore size in carbon monoliths was increased.The decrease rate of porosity of mesoporous carbon monoliths derived from different curing catalyst content and curing temperature changed from 3.6% to 48.1%.The change degree of the porosity of carbon monoliths derived from different curing catalyst content before/after pyrolysis was more obvious,compared to that of carbon monoliths derived from different curing temperature.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第4期87-89,120,共4页
New Chemical Materials
基金
国家自然科学基金(50972117)
新余学院校级招标项目(xj0902)
关键词
介孔碳
单体
热裂解
孔形态
相结构
mesoporous carbon
monolith
pyrolysis
pore property
phase structure
