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以聚乙二醇甲基丙烯酸甲酯(PEGMEMA)和甲基丙烯酸甲酯(MMA)为原料,用偶氮二异丁腈引发合成聚甲基丙烯酸甲酯-g-聚乙二醇甲基丙烯酸甲酯(PMMA-g-PEO)共聚物。通过静电纺丝制备了PMMA-g-PEO纳米纤维膜,并通过表面改性制备了功能梯度材料。通过正交设计,探究了水解工艺中浓度、温度和时间3个因素对纤维膜吸附性能的影响,利用傅里叶红外光谱与扫描电镜分别对纳米纤维改性前后的结构与外观形态进行表征。结果表明:引入的亲水性支链有效地改善了PMMA的可纺性;在NaOH浓度为0.5mol/L,反应时间为8h,反应温度为70℃的水解工艺条件下,功能化纤维膜具有较好的铅离子吸附能力,吸附容量为113.85mg/g。
Polyethylene glycol methyl methacrylate (PEGMEMA) and methyl methacrylate (MMA) as raw materials, with azobisisobutyronitrile induced synthesis of polymethyl methacrylate-g-polyethylene glycol methacrylic acid Methyl methacrylate (PMMA-g-PEO) copolymer. PMMA-g-PEO nanofibers were prepared by electrospinning. Functional graded materials were prepared by surface modification. The orthogonal design was used to investigate the influence of concentration, temperature and time on the adsorption performance of the fiber membrane. The structure and appearance of the membrane before and after modification were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The results showed that the introduction of hydrophilic branched chain effectively improved the spinnability of PMMA. Under the conditions of NaOH concentration of 0.5 mol / L, reaction time of 8 h and reaction temperature of 70 ℃, the functionalized fiber membrane had Better lead ion adsorption capacity, adsorption capacity of 113.85mg / g.