School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China.
School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China.
Int J Biol Macromol. 2019 Aug 15;135:691-697. doi: 10.1016/j.ijbiomac.2019.05.107. Epub 2019 May 30.
In this study, hordein and hordein/N,N'-methylene bisacrylamide (MBA) nanofiber membranes were prepared by electrospinning technique. Then the fabricated membranes were modified with β-cyclodextrin (β-CD) to remove heavy metal ions from aqueous solution. The prepared nanofiber membranes were characterized by ATR-FTIR, SEM and XRD. The diameters of the nanofibers were determined to be around 600-910 nm and β-CD was successfully attached to the nanofiber membrane, which was confirmed by ATR-FTIR and XRD analysis. Cu(II) was selected as the model ion to investigate the heavy metal adsorption properties of the membranes. Adsorption capacities of the membranes increased with a higher initial pH, adsorption temperature and a longer adsorption time before reaching the saturation point. The adsorption isotherm results were described with the Langmuir model. It was found that additions of MBA and β-CD at proper concentrations could significantly improve the adsorption capacities and the maximum adsorption of hordein, hordein/MBA, and hordein/MBA/β-CD nanofiber membranes were 64.94, 81.97, and 88.50 mg/g, respectively. Furthermore, regeneration study showed that these hordein nanofiber membranes possessed reasonably good reusability. The novel functionalized hordein/MBA/β-CD nanofiber membranes have great potential in the application of water treatment.
在这项研究中，通过静电纺丝技术制备了麦醇溶蛋白和麦醇溶蛋白/N,N'-亚甲基双丙烯酰胺（MBA）纳米纤维膜。然后，用β-环糊精（β-CD）对制备的膜进行修饰，以从水溶液中去除重金属离子。通过 ATR-FTIR、SEM 和 XRD 对制备的纳米纤维膜进行了表征。纳米纤维的直径约为 600-910nm，并且β-CD 成功地附着在纳米纤维膜上，这通过 ATR-FTIR 和 XRD 分析得到了证实。选择 Cu(II)作为模型离子来研究膜对重金属的吸附性能。在达到饱和点之前，随着初始 pH 值、吸附温度和吸附时间的增加，膜的吸附容量增加。吸附等温线结果用朗缪尔模型描述。结果发现，MBA 和β-CD 的适当浓度添加可以显著提高吸附容量，麦醇溶蛋白、麦醇溶蛋白/MBA 和麦醇溶蛋白/MBA/β-CD 纳米纤维膜的最大吸附量分别为 64.94、81.97 和 88.50mg/g。此外，再生研究表明，这些麦醇溶蛋白纳米纤维膜具有较好的可重复使用性。新型功能化麦醇溶蛋白/MBA/β-CD 纳米纤维膜在水处理应用中具有很大的潜力。
