| 氧化石墨烯-Ag纳米粒子/聚酰亚胺混合基质膜及其渗透汽化性能 | |
| Preparation and Pervaporation Property of GO-AgNP/PI Mixed Matrix Membranes | |
| 摘要: 以聚乙二醇(PEG-400)为还原剂，AgNO3为前驱体，采用浸渍-还原法合成氧化石墨烯-Ag纳米粒子(GO-AgNP)复合物，再通过共混法制备氧化石墨烯-Ag纳米粒子/聚酰亚胺(GO-AgNP/PI)混合基质膜，用于苯/环己烷混合物的渗透汽化分离。使用透射电子显微镜、红外吸收光谱、拉曼光谱、热失重以及X射线光电子能谱等分析表征GO-AgNP复合物、GO-AgNP/PI混合基质膜的形貌和结构；探讨了Ag掺杂量对GO-AgNP复合物的结构以及GO-AgNP/PI混合基质膜的结构和渗透汽化性能的影响。结果发现，Ag+被还原形成AgNP的同时，GO失去了部分含氧官能团；Ag掺杂破坏了GO的结构，使其无序度增加，但改善了GO-AgNP复合物在混合基质膜中的分散性，提升了GO-AgNP/PI混合基质膜的苯/环己烷渗透汽化性能。然而过量的Ag掺杂将使GO片层上产生Ag粒子团聚，从而降低混合基质膜的渗透汽化性能。当Ag掺杂量为15%时，GO-AgNP/PI混合基质膜渗透汽化性能最佳，渗透通量为1404 g·m-2·h-1，分离因子可达36.2。 | |
| 关键词: 氧化石墨烯 Ag纳米粒子 聚酰亚胺 混合基质膜 渗透汽化 | |
| 基金项目: 国家自然科学基金（No.21376218,21076190）资助项目。 | |
| Abstract: Graphene oxide-Ag nanoparticle(GO-AgNP) composites were synthesized by impregnation-reduction method using polyethylene glycol (PEG-400) as the reducer and AgNO3 as the source of AgNP, which were then blended with polyimide(PI) to prepare GO-AgNP/PI mixed matrix membranes. The structure of GO-AgNP composites and GO-AgNP/PI mixed matrix membranes were characterized by Transmission electron microscopy(TEM), Fourier transform infrared spectroscopy(FT-IR), Raman spectroscopy, Thermo-gravimetric analysis(TGA), X-ray photoelectron spectroscopy(XPS). The effect of AgNP-doping on pervaporation property of GO-AgNP/PI mixed matrix membranes was investigated for separation of benzene/cyclohexane mixture. The results reveal that the dope of AgNP would slightly destroyed the structure of GO, and the disorder degree of GO structure increased, the oxygen-containing functional groups of GO decreased in Ag+ reduced to form AgNP. But the dope of AgNP which was helpful to improve the dispersion of AgNP-GO composite in the mixed matrix membrane, thus enhance the pervaporation performance of the mixed matrix membrane. However, the excess of AgNP-doping would lead to the aggregation of Ag particles on the GO surface, which depressed the pervaporation performance of the mixed matrix membrane. When AgNP-doping reached 15% in GO-AgNP composite, the mixed matrix membrane demonstrates good pervaporation perporty, and the separation factor reached 36.2 and the flux is 1404 g·m-2·h-1. | |
| Keywords: Ag nanoparticles graphene oxide polyimide mixed matrix membrane pervaporation | |
| 投稿时间：2016-01-11 修订日期：2016-05-31 | |
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| 蒋漾漾,戴世麒,俞心怡,林泽俊,施沈炫湘,王挺,吴礼光.氧化石墨烯-Ag纳米粒子/聚酰亚胺混合基质膜及其渗透汽化性能[J].无机化学学报,2016,32(8):1345-1352. | |
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