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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Preparation of macroporous aluminium oxide using template of poly(methacrylic acid-co-glycidylmethacrylate) crosslinked with methylenebisacrylamide
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Preparation of macroporous aluminium oxide using template of poly(methacrylic acid-co-glycidylmethacrylate) crosslinked with methylenebisacrylamide

机译：以亚甲基双丙烯酰胺交联的聚（甲基丙烯酸-甲基丙烯酸缩水甘油酯）为模板制备大孔氧化铝

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Poly(methacrylic acid-co-glycidylmethacrylate), poly(MA-co-GMA) samples were prepared by exposure to gamma-irradiation, at fixed concentration of methylenebisacrylamide MBA, 0.5% wt/wt as crosslinker while the MA/GMA ratio was varied. FTIR spectra showed bands refer to MA, as well as GMA, indicating the involvement of both in the copolymerization. Al(NO 3 ) 3 .9H 2 O as a precursor for the preparation of aluminium oxide was templated as a guest into the crosslinked gels by soaking the gels in a methanol solution. The perturbation of the bands at 3439, 2926, 1635, 1476, 1394, and 1166 cm -1 after the templation of the guest, provides evidence for the loading of the guest species into the gel. The swelling behavior of the prepared samples found to be dependent on the composition of the gel and the pH. The templation of the aluminium nitrate into the gel was further proved by thermal gravimetric analysis (TGA). Scanning electron microscopy (SEM) was used for investigating the produced oxide particles, which revealed macropores with maximum diameter at MA/GMA, 4060 wt/wt (H3) and complete disappearance at 80 wt% of methacrylic acid (H5). X-ray diffraction (XRD) showed an amorphous structure of the aluminium oxide. Increasing the hydrophilicity of the template leads to an increase in the Lewis acidic sites on the surface of the produced aluminium oxide up to 60 wt% of methacrylic acid (H4) while a further increase was met by a redecrease in the surface acidity (H5).
机译：聚（甲基丙烯酸-共-甲基丙烯酸缩水甘油酯），聚（MA-co-GMA）样品通过在固定浓度的亚甲基双丙烯酰胺MBA，0.5％wt / wt作为交联剂的伽玛射线辐照下进行制备，同时改变MA / GMA的比例。 FTIR光谱显示，谱带指的是MA以及GMA，表明两者均参与共聚。通过将凝胶浸泡在甲醇溶液中，将作为制备氧化铝的前体的Al（NO 3）3 .9H 2 O作为客体模板化到交联凝胶中。客体模板化后，在3439、2926、1635、1476、1394和1166 cm -1处的条带扰动为客体物质加载到凝胶中提供了证据。发现制备的样品的溶胀行为取决于凝胶的组成和pH。通过热重量分析（TGA）进一步证明了硝酸铝进入凝胶的模板。使用扫描电子显微镜（SEM）研究产生的氧化物颗粒，该氧化物颗粒显示出在MA / GMA处具有最大直径，4060 wt / wt（H3）且在80 wt％的甲基丙烯酸（H5）处完全消失的大孔。 X射线衍射（XRD）显示氧化铝的无定形结构。模板亲水性的提高导致所生产的氧化铝表面上的路易斯酸性位点增加至60 wt％的甲基丙烯酸（H4），而表面酸度（H5）的降低又进一步增加了模板的亲水性。

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