摘要
采用软模板法合成有序介孔炭(OMC),利用XRD、TEM及SEM等分析方法对其进行结构性能分析,探讨了催化剂和模板剂的种类及用量、反应温度等合成工艺条件对形成OMC结构性能的影响。以最佳工艺条件制备的OMC前驱体为涂膜液涂敷在管状微滤炭膜表面,经炭化制得有序介孔复合炭膜,而后考察了复合炭膜的气体渗透性能。结果表明:以盐酸为催化剂、模板剂F127/间苯二酚摩尔比为0.0081、反应温度为30℃时,可合成有序程度最佳的OMC前驱体。用该OMC前驱体涂敷微滤炭膜制备的有序介孔复合炭膜,改善了微滤炭膜的孔结构,最大孔径由0.530μm减小至0.299μm,同时提高了炭膜的气体渗透通量。其中,由混煤微滤炭膜所制有序介孔复合炭膜,N2气渗透通量达1.18·10-8m3·m-2·s-1·Pa-1,是未经修饰烟煤微滤炭膜的4倍。
An ordered mesoporous carbon （OMC） was synthesized by the soft templating method using resorcinolformaldehyde as carbon source, and Pluronic F127 and F123 as templates. The carbon composite membrane was prepared by coating the precursors under optimum conditions on the outer surface of a tubular carbon membrane produced from blended coals, followed by carbonization to remove the template and convert the precursors to carbon. The influence of synthesis conditions such as kinds and quantities of the templates and catalysts on the structure and performance of the OMC were investigated by TEM, SEM and XRD. Results indicated that an optimized OMC with a wellordered pore structure and high permeation flux was synthesized under catalysis of HCl, F127/resorcinol molar ratio of 0.0081 and reaction temperature at 30℃. The largest pore size of carbon membranes decreased from 0.530μm for the tubular carbon membrane to 0.299μm for the composite membrane. The N2 permeability of the composite membrane reached 1.18·10-8m3·m-2·s-1·Pa-1, which was four times that of the conventional soft coalbased carbon membrane.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2010年第4期273-278,共6页
New Carbon Materials
基金
国家自然科学面上与重点基金(20776024
20976021
20836006)
国家863项目(2009AA03Z215)~~
关键词
复合炭膜
气体渗透通量
有序介孔炭
Composite carbon membrane： Gas permeation flux： Ordered mesoporous material
