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首页> 外文期刊>Journal of Applied Polymer Science >Grafting of cyclodextrins onto polypropylene nonwoven fabrics for the manufacture of reactive filters. III. Study of the sorption properties
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Grafting of cyclodextrins onto polypropylene nonwoven fabrics for the manufacture of reactive filters. III. Study of the sorption properties

机译：将环糊精接枝到聚丙烯无纺布上，以制造反应性过滤器。三，吸附性能的研究

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Polypropylene nonwoven supports carrying alpha-, beta-, and gamma-cyclodextrins (CDs) were synthezised. The synthesis consisted of grafting glycidyl methacrylate (GMA) onto the fibers and reacting CDs with epoxide groups in the second step. This article concerns the sorption capacity of these supports toward organic pollutant models of 2-naphtol, 4-nitrophenol, pentachlorophenol, and (2,4-dichlorophenoxy) acetic acid in static (batch) or dynamic (filtration) conditions. The results confirmed that the grafting of CDs onto the supports gave them their specific sorption properties. Besides, it was observed that the best performances were attained when the GMA add-on was in the range of 76-113 % wt and the CD content was 87-118 mumol/g. We also evidenced that the interactions between the organic substrates and the filter occurred through specific interactions with CDs (host-guest inclusion compounds) and that to a lesser extent, nonspecific sorption phenomena also occurred, The data showed that the affinity between the pollutants with three different grafted CDs was not in agreement with the complex formation constants measured in homogeneous systems. Furthermore, the slow kinetics of exchange between the liquid and solid phases was a limiting factor that should prevent the use of the filters at elevated flow rates. At last, the great advantage of these filters is that they could undergo several cycles of use, thanks to intermediate regeneration steps with water-organic solvent mixtures. (C) 2002 Wiley Periodicals, Inc. [References: 7]
机译：合成了携带α-，β-和γ-环糊精（CD）的聚丙烯非织造载体。合成过程包括将甲基丙烯酸缩水甘油酯（GMA）接枝到纤维上，然后在第二步中将CD与环氧基反应。本文涉及这些载体在静态（分批）或动态（过滤）条件下对2-萘酚，4-硝基苯酚，五氯苯酚和（2,4-二氯苯氧基）乙酸的有机污染物模型的吸附能力。结果证实，将CDs接枝到载体上赋予它们特定的吸附性能。此外，观察到当GMA添加物在76-113重量％的范围内且CD含量为87-118μmol/ g时，可获得最佳性能。我们还证明了有机底物和过滤器之间的相互作用是通过与CD（宿主-客体包含物）的特异性相互作用而发生的，并且在较小程度上，还会发生非特异性吸附现象。数据表明，污染物与三种污染物之间的亲和力不同的接枝CD与均质系统中测得的复合物形成常数不一致。此外，液相和固相之间的缓慢交换动力学是一个限制因素，应防止在高流速下使用过滤器。最后，由于采用了水-有机溶剂混合物的中间再生步骤，这些过滤器的最大优点是可以经历数个使用周期。 （C）2002 Wiley Periodicals，Inc. [参考：7]

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