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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1 h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1 h后,可使Cu2+浓度从20降到0.3μg/mL,而CrO42-从20降到10.7μg/mL.
(PVDF) or polyacrylonitrile (PAN) composite micro-filtration tubes filled with graphene oxide (GO) were prepared by suction filtration and characterized by X-ray diffraction (XRD), Raman spectroscopy (Raman), transmission electron (TEM) and scanning electron microscopy (SEM) were used to characterize the effects of the composite micro-filtration tubes on the fragrance substances (citral or citronellol) and heavy metal ions (CrO42- or Cu2 +) Separation performance.The results showed that the spherical GO was mainly filled in the pores of PVDF or PAN microfiltration wall between 0.15 ~ 0.5μm, the pores in the pores became smaller, and a large number of oxygen-containing groups , So the composite micro-filter can not only filter the role of small organic molecules, but also play a role of chemical or physical adsorption of heavy metal ions, thereby expanding the scope of the application of graphene oxide and micro-filtration tube test results also show that, The citral concentration decreased from 15.0% to 0.6% (volume percentage) and the citronellol concentration decreased from 11.0% to 2.3% (volume percentage) after filtration for 1 h in citral or citronellol ethanol solution. After filtration Cu2 + or CrO42-aqueous solution for 1 h, Cu2 + concentration can be reduced from 20 to 0.3μg / mL, and CrO42-from 20 down to 10.7 μg / mL.