β-环糊精修饰聚乙烯醇纳米纤维的制备及其吸附性质研究  

Preparation of Polyvinyl Alcohol Nanofiber Membrane Functionalized by Beta-cyclodextrins for Molecular Filtration

作　　者：李伟[1] 杨丰宇[1] 吴思雨[1] 赵君霞[1] 贺君钰 石军[1] 尉震[1] 

机构地区：[1]天津农学院基础科学系,天津300384

出　　处：《天津农学院学报》2013年第4期21-24,共4页Journal of Tianjin Agricultural University

基　　金：天津农学院科技发展基金计划项目"瓜环在环境;农残分析及药物缓释中的应用"(2009N02);天津农学院大学生科技创新活动项目"功能化静电纺丝的制备及其应用"(无编号)

摘　　要：通过静电纺丝技术,以聚乙烯醇(PVA)与戊二醛为原料制得聚乙烯醇纳米纤维薄膜(PVA-NF膜)。先在酸性条件下,使该薄膜交联成非水溶性的纳米纤维薄膜(c-PVA-NF膜),而后在碱性条件下,先将环氧氯丙烷与膜反应,将环氧丙基键合到膜上,继而将β-环糊精与环氧基反应修饰到膜表面,制备出具有选择吸附性能并可重复利用的纳米纤维材料(c-PVA-β-CD-NF膜)。通过傅里叶变换红外光谱仪、扫描电子显微镜表征,确定所制得膜表面已成功键合上β-环糊精,且键合前后膜表面形态无明显变化。本文以酚酞为探针,用于检测c-PVA-β-CD-NF膜对其溶液的吸附行为,用紫外分光光度检测所制得的c-PVA-β-CD-NF膜对酚酞的吸附效率。实验表明,相对于未修饰的c-PVA-NF膜,c-PVA-β-CD-NF膜对酚酞的吸附能力显著增强,并在30 min达到吸附平衡,最大吸附量为88 mg/g。Abstract： Polyvinyl alcohol （PVA） and glutaraldehyde were used as the materials to prepare PVA nanofiber membrane by electro-spinning technique. Under acidic condition, the membrane was crosslinked into water-stable nanofibrous mats, then in alkaline condition, the epoxy chloropropane reacted with the membrane and the epoxypropyl was bonded to the membrane surface. Consequently, the Beta-cyclodextrin （β-CD） reacted with epoxy group modification on the surface membrane to prepare the nanofiber material with absorption selectivity and recyclability. Fourier transform infrared spectrometer and scanning electron microscopy characterization were used to demonstrate that the membrane surface had been successfully bonded with beta-eyclodextrin （β-CD） and there was no obvious change of membrane surface morphology after the bonding. In the essay, phenolphthalein was used as the probe to detect the c-PVA-β-CD-NF membrane adsorption effect of its solution and the UV spectrophotometry was used to detect the absorption efficiency of the c-PVA-β-CD-NF membrane to phenolphthalein. The , experiments show that the adsorption capacity on phenolphthalein of the c-PVA-II-CD-NF membrane was stronger than that of the PVA membrane significantly, it was at 30 rnin that the adsorption reached the state of equilibrium and the maximum adsorotion caoacitv was 88 mg-/g.

关 键 词：静电纺丝 聚乙烯醇 13-环糊精 表面修饰 酚酞 吸附 

分 类 号：O647.33[理学—物理化学]