| 董佳睿,王翔,曹雪森,叶得蓉,张爱英,冯增国.β-环糊精/聚多巴胺功能化纤维膜的制备及其对水中有机污染物的吸附[J].农业环境科学学报,2025,44(4):1088-1097. |
| β-环糊精/聚多巴胺功能化纤维膜的制备及其对水中有机污染物的吸附 |
| Preparation of β-cyclodextrin/polydopamine functionalized fibrous membrane and its adsorption of organic pollutants in water |
| 投稿时间：2024-08-12 |
| DOI：10.11654/jaes.2024-0674 |
| 中文关键词: 静电纺丝 环糊精 聚多巴胺 表面功能化 吸附材料 |
| 英文关键词: electrospinning cyclodextrin polydopamine surface functionalization adsorbent |
| 基金项目:国家自然科学基金项目（21774016）；国家级大学生创新创业训练计划项目（202410007042，202410007045） |
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| 中文摘要: |
| 为解决水体系中各类有机污染物造成的环境污染问题，开发多功能水净化材料具有重要意义，本研究以具有独特空腔结构和络合能力的羧基化β-环糊精（cm-β-CD）为主要吸附位点，以具有黏附性且含有丰富儿茶酚基团和氨基官能团的聚多巴胺涂层（s-PDA）作为中间层，通过化学键合方式将cm-β-CD固定于聚氨酯（PU）/聚偏氟乙烯（PVDF）电纺纤维表面，从而获得功能化纤维膜（PU/PVDF/s-PDA/cm-β-CD）。通过扫描电子显微镜、水接触角测试、傅里叶变换红外光谱、X射线衍射、热重分析等多种方法对功能化纤维膜进行表征，结果表明：s-PDA及cm-β-CD组分在纤维表面的成功引入可以赋予该吸附材料多重吸附位点，从而实现对水中不同荷电性有机污染物的高效吸附。同时功能化纤维膜的拉伸强度可达 14.90 MPa、断裂伸长率可达 100.50%，具有优异的柔韧性，使用过程中便于从水体系中分离。选用亚甲基蓝（MB）、酚酞（PHP）作为有机污染物模型进行吸附实验。PU/PVDF/s-PDA/cm-β-CD功能化纤维膜对阳离子有机污染物MB和阴离子有机污染物PHP均表现出较好的吸附能力，吸附动力学拟合结果显示其对MB和PHP的吸附行为均符合准二级动力学模型，主要吸附机理分别涉及π-π共轭作用和静电相互作用，以及主客体络合作用和氢键作用。本研究制备的功能化纤维膜为去除水中多种有机污染物提供了一种新的选择，拓宽了其在分离、净化和分子过滤等领域的潜在应用。 |
| 英文摘要: |
| To solve the problem of environmental pollution caused by various organic pollutants in water system, it is of great significance to develop multi-functional water purification materials. In this study, carboxylated β-cyclodextrin（cm-β-CD）with unique cavity structure and complexation was used as the main adsorption site, and polydopamine coating（s-PDA）with adhesion and rich catechol groups and amino functional groups was used as the intermediate layer. The functionalized fibrous membrane（PU/PVDF/s-PDA/ cm-β-CD）was obtained by chemical bonding on the surface of polyurethane（PU）/polyvinylidene fluoride（PVDF）electrospun fibers. The functionalized fibrous membrane was characterized by scanning electron microscopy, water contact angle test, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and other methods. The results showed that the successful incorporation of s-PDA and cm-β-CD components on the fiber surface could endow the multiple adsorption sites for the adsorption material. Thus, the adsorption of various charged organic pollutants in water could be realized efficiently. At the same time, the functionalized fibrous membrane could reach the tensile strength of 14.90 MPa, and the elongation at break of 100.50%, which had excellent flexibility and was easy to separate from the water during the adsorption process. Methylene blue（MB）and phenolphthalein（PHP）were chosen as organic pollutant models with different charge properties for adsorption experiments. PU/PVDF/s-PDA/cm-β-CD functionalized fibrous membrane showed good adsorption capacity for both cationic organic pollutant MB and anionic organic pollutant PHP. The fitting results of adsorption kinetics models indicated that the adsorption behavior of MB and PHP conformed to the Pseudo-second-order kinetic model, and the main adsorption mechanism involved π-π conjugation and electrostatic interaction, as well as host and guest complexation and hydrogen bonding, respectively. The membrane prepared in this study provides a new idea for the removal of various charged organic pollutants in water, and has potential applications in separation, purification and molecular filtration. |
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