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科学通报  2014 

氧化石墨烯填充PVDF或PAN微滤管的组装及在香精分离和重金属离子吸附上的应用

DOI: 10.1360/972013-1105, PP. 2940-2946

Keywords: 微滤管,氧化石墨烯,PVDF,PAN,复合材料

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Abstract:

采用抽滤技术制备了氧化石墨烯(GO)填充的聚偏氟乙烯(PVDF)或聚丙烯腈(PAN)复合微滤管,并用X射线衍射(XRD),拉曼光谱(Raman),透射电子显微镜(TEM)和扫描电子显微镜(SEM)等测试技术对其进行了表征,同时还分别测试了复合微滤管对香精物质(柠檬醛或香茅醇)和重金属离子(CrO42-或Cu2+)的分离性能.结果表明,呈球状的GO主要填充在0.15~0.5μm间的PVDF或PAN微滤管壁内的孔道中,使得孔道中空隙变得更小,又因GO表面存在大量含氧基团,所以复合微滤管既能起到过滤分离有机小分子的作用,又能起到化学或物理吸附重金属离子的作用,从而扩展了氧化石墨烯及微滤管的应用范围.测试结果还表明,在柠檬醛或香茅醇的乙醇溶液过滤1h后,柠檬醛浓度从15.0%降到0.6%(体积百分比),而香茅醇浓度则从11.0%降到2.3%(体积百分比);在过滤Cu2+或CrO42-水溶液1h后,可使Cu2+浓度从20降到0.3μg/mL,而CrO42-从20降到10.7μg/mL.

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