高分子模板剂在大孔氧化铝纳米材料中的脱除

发布时间：2018-04-01 23:06

本文选题：溶剂萃取　切入点：大孔氧化铝　出处：《精细石油化工》2017年03期

【摘要】：采用不同溶剂对大孔氧化铝纳米材料中高分子模板剂的脱除进行研究,对萃取后的载体进行重量和元素分析,并进行扫描电镜(SEM)和孔性质(BET)表征;同时对油相产物进行凝胶色谱(GPC)和红外定性(IR)分析。结果表明,采用汽油-乙醇(PT+AE)作为萃取剂,模板剂(RHP)脱除率达到86.81%,碳、氢、氮元素脱除率分别为80.44%、81.67%、62.83%。载体经萃取、焙烧后,压汞法测得孔容为1.24 mL/g、比表面积为253.3m~2/g、可几孔径为17.4nm。SEM照片证实模板剂的脱除使载体形成大量介孔/大孔结构。当聚异丁烯马来酸酐(PIBSA)和三乙醇胺(TEA)的质量比例为12∶1时,GPC测得RHP的重均相对分子质量M_w和数均相对分子质量M_n分别为14 384和2 545g/mol,说明模板剂为大分子高聚物,其分散系数M_w/M_n为5.65,说明相对分子质量分布范围较宽。红外定性分析进一步证实模板剂和油相产物具有相同的结构,说明模板剂可回收利用,绿色环保。
[Abstract]:The removal of macromolecular template from macroporous alumina nanomaterials was studied by using different solvents. After extraction, the weight and element of the carrier were analyzed, and characterized by SEM and BET. At the same time, the oil phase products were analyzed by GPC and IR. The results showed that the removal rate of RHPs was 86.81, and the removal rates of carbon, hydrogen and nitrogen were 80.44, 81.67 and 82.83.After extraction and calcination, the removal rate of RHPs was 86.81, respectively. The pore volume was 1.24 mL / g and the specific surface area was 253.3 mg / g by mercury injection method. The 17.4nm.SEM photographs showed that the removal of the template made the carrier form a large number of mesoporous / macroporous structures. When the mass ratio of polyisobutene maleic anhydride (PIBSA) and triethanolamine (tea) was 12:1, it was confirmed that the removal of the template made the carrier form a large number of mesoporous / macroporous structures. The relative molecular weight of RHP was 14 384 and 2 545 g / mol, respectively, indicating that the template was a macromolecular polymer. The dispersion coefficient (M_w/M_n) is 5.65, which indicates that the relative molecular mass distribution range is wide. The IR qualitative analysis further proves that the template and the oil phase have the same structure, which indicates that the template agent is recyclable and environmentally friendly.
【作者单位】：辽宁石油化工大学化学化工与环境学部;中国石化抚顺石油化工研究院;
【基金】：中海油重大项目(HL00FW(P)) 中国石油化工集团资助项目(030801) 大学生创新创业项目(2015073)
【分类号】：TB383.1;TQ133.1

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