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采用静电纺丝技术制备聚乙烯醇纳米纤维膜,结合溶胶-凝胶法制备二氧化钛对纳米纤维膜进行交联改性。分析交联前后材料表面形貌、表面化学基团变化以及耐水性和热性能。研究纳米纤维膜对模型污染物罗丹明B的吸附和光催化降解性能。结果表明:交联改性后材料耐水性显著提高,纤维形貌保持不变,材料表面化学基团无显著变化,材料热分解温度提高。交联改性后的纳米纤维膜材料容易吸附罗丹明B,紫外光照射下材料具有一定的光催化降解性能。
An electrospinning technique was used to prepare polyvinyl alcohol nanofiber membrane. Titanium dioxide was prepared by sol-gel method to modify the nanofiber membrane. The surface morphology of the materials before and after cross-linking, the change of chemical groups on the surface and the water and thermal properties were analyzed. The adsorption and photocatalytic degradation of model pollutant rhodamine B by nanofiber membranes were studied. The results showed that the water resistance of the modified materials increased significantly, the morphology of the fibers remained unchanged, the chemical groups on the surface of the materials did not change significantly, and the thermal decomposition temperature of the materials increased. The crosslinked modified nanofibrous membrane material can adsorb rhodamine B easily, and the material has certain photocatalytic degradation performance under ultraviolet light irradiation.