静电纺PMMA/SiO_2复合纤维结构形态的优化

Structure and morphology optimization of PMMA/silica electrospun composite fiber

将接枝交联结构不同的二氧化硅/聚甲基丙烯酸甲酯(SiO2/PMMA)复合材料与PMMA树脂混合后,溶于N,N-二甲基甲酰胺(DMF)溶剂中制成高分子溶液,再通过静电纺丝技术制备相应的复合纤维。通过3D-POM、SEM、TEM等技术考察了电纺工艺和配方对复合纤维结构形态的影响。研究结果表明,SiO2接枝率为484.4%的简单接枝SiO2/PMMA/DMF高分子溶液具有较好的可纺性,在优化条件下制得的亚微米级PMMA/SiO2复合纤维形貌规整,表面平滑,直径和SiO2含量在较大范围内可调,SiO2在纤维内分散均匀稳定、且这种高分散性不受纤维直径和SiO2含量的影响。

Silica/poly（methyl methacrylate） grafting composites （SiOJPMMA） with different grafting/ crosslinking structures and PMMA resin were firstly mixed and then dissolved in N, N-dimethyl foramide （DMF）, the resulting high polymer solution was electrospun into corresponding composite fibers. The effects of electrospinning process and formulation on the structure and morphology of the composite fibers were investigated using 3D-POM, SEM, TEM, etc. It was found that SiO2/PMMA/DMF high polymer solution with the simple-grafted silica （graft percentage of 484.4% ） has better spinnability. A series of submicron PMMA/SiO2 composite fibers prepared under optimal conditions have regular morphology, and smooth surface, with fiber diameter and silica content adjustable in a wide range. Silica is evenly dispersed inside the fibers and this high dispersibility is not limited by the fiber diameter and silica content.