以酚醛树脂为碳前驱体,两亲嵌段共聚物F127为软模板,在碱-酸体系条件下合成非支撑介孔炭膜.通过扫描电镜(SEM)、透射电镜(TEM)、低温氮气吸附-脱附和气体分离测试对炭膜的形貌、孔结构以及气体分离性能进行了测试和表征.结果表明,通过改变软模板剂F127的用量和炭化温度可以实现对炭膜孔结构的控制制备.随着 F127与苯酚质量比的增大,炭膜的比表面积、总孔容以及平均孔径呈先增大后减小的趋势；在质量比为1．06时,比表面积达467 m2/g,介孔率为31．3％.随炭化温度由600℃升高至800℃时,炭膜的孔结构由无规则的蠕虫状孔结构转变成丰富的二维六方孔道结构.炭膜厚度约300μm,对 CO2和 N2具有良好的分离性能,CO2/N2分离系数可达2．53.
Carbon membrane without-supported was synthesized from phenolic resin using amphiphilic block co-polymer F127 as soft template in alkali-acid system.Scanning electron microscopy,transmission electron mi-croscopy,nitrogen adsorption-desorption (77 K)and CO2/N2 separation was used to observe the surface mor-phology and test the performance.Results showed that the surface morphology and pore structure of the sam-ples can be controlled by varying F127 dosages and carbonization temperature.With the increasing of mass ratio of phenol to F127,Surface area,pore volume and average pore diameter increased firstly,and then decreased, Surface area of 467 m2/g and mesopores rate of 31.3% can be achieved when the mass ratio is 1.06.With the carbonization temperature increasing from 600 to 800 ℃,disordered worm-like pore structure was converted in-to extensive two-dimensional(2D)hexagonal pore structure.Thickness of the prepared carbon membrane was a-bout 300μm,which exhibited excellent separation performance for CO2 and N2 ,and the selectivity for CO2 and N2 of 2.53 could be achieved.
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