工业酚醛树脂制备有序介孔炭性能研究

Preparation of ordered mesoporous carbon by using industrial phenolic resins

以不同分子质量的工业酚醛树脂和自制的酚醛树脂分别为炭前体,以三嵌段共聚物F127为模板剂,探究工业酚醛树脂合成有序介孔炭可行性。在有机-有机自组装法基础上,利用工业酚醛树脂成功制备出介孔炭材料。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和N2吸脱附等技术手段对其结构、形貌进行表征,并探究材料对亚甲基蓝(MB)的吸附性能。结果表明:工业酚醛树脂可制备出有序介孔炭,其中PF-8012型工业酚醛树脂制备出的介孔炭材料(MC-2)和实验室自制酚醛树脂(MC-0)都呈二维六方介观结构,介孔都高度均一有序,MC-2平均孔径为3.9 nm,平均比表面积为604 m2/g,MC-0平均孔径为3.4 nm,平均比表面积为517 m2/g,两者吸附均符合二级动力学方程和Langmuir吸附等温曲线,且MC-2平衡吸附量为70 m2/g,大于MC-0的67 m2/g。

The feasibility of preparing ordered mesoporous carbon by using homemade phenolic resins and industrial phenolic resins with different molecular weights as carbon precursor, and tribloek copolymer F127 as template, is performed. The mesoporous carbon is successfully prepared with industrial phenolic resin materials via organic-organic self-assembly method. SEM, TEM and N2 adsorption-desorption techniques are used to characterize the structure and morphology of the obtained mesoporous carbon. The adsorption of methylene blue （MB） is also performed. The results show that the industrial phenolic resin can be used to prepare mesoporous carbon. The mesoporous carbon （ MC-2 ） made from PF-8012 industrial phenolic resin and that （MC-0） made from the laboratory-made phenolic resin both have two dimensional hexagonal mesostructure and their mesoporous are highly uniform. The average pore diameter/average specific surface area of MC-2 and MC-0 are 3.9 nm/604 m2/g and 3.4 nrn/517 mE .g-1 ,respectively. The absorption behavior is both in line with second-order kinetics and Langrnuir adsorption isotherms. And the equilibrium adsorption capacity of MC-2 （70 m2 .g-1 ） is larger than that of MC-0（67 m2 .g-i1）.