静电纺聚乳酸共混多孔超细纤维膜的制备及其对染料的吸附性能

Preparation of Electrospun Polylactic Acid Blending Porous Superfine Fiber Membrane and Its Adsorption Property for Acid Yellow Dye

为了制备高效吸附染料且易回收的多孔超细纤维吸附材料,将聚乙二醇(PEG)和双氨基乙二醇(NH_2-PEG-NH_2)与聚乳酸(PLA)共混于二氯甲烷与二甲基乙酰胺质量比为9:1的二元混合溶剂中配置纺丝液,通过静电纺丝技术一步制备PLA共混多孔超细纤维膜,研究PEG和NH_2-PEG-NH_2的共混比例对纤维表面微孔结构及其对酸性黄染料吸附性能的影响。结果表明,随着PEG和NH_2-PEG-NH_2共混比例增加,共混纤维的直径和表面微孔分布密度逐渐减小,共混纤维膜在染液中的质量损失率逐渐增加,但是对酸性黄染料的吸附量均较低,且氨基基团对酸性黄染料的吸附性能优于羟基。

In order to prepare effective dyes and recyclable porous superfine fiber adsorption material,spinning solution was prepared by respectively blending polyethylene glycol（ PEG） and NH2-PEG-NH2 with polylactic acid（PLA） which were dissolved in a binary solvent of methylene chloride and dimethyl acetamide with mass ratio 9：1.And then the PLA blending superfine porous fiber membranes were prepared by electrospinning technology. The effects of blending ratio of PEG and NH2-PEG-NH2 on the porous structure of fiber surface and its adsorption property for acid yellow dye were studied. The results showed that with the increase of the blending ratio of PEG and NH2-PEG-NH2,the fiber diameter and distribution density of micropores on the fibers decreased and the mass loss of blending fibrous membranes in dye solution increased,but the adsorption capacities for acid yellow dye were relatively low and the adsorption property of amino group for acid yellow dye was better than that of hydroxyl group.