同轴静电纺丝法制备多孔镁铝尖晶石纤维
发布时间：2018-09-19 12:13
【摘要】：为制备多孔镁铝尖晶石纤维,首先以无水氯化铝、无水氯化镁、无水乙醇为原料,二氯甲烷为溶剂,采用非水解溶胶-凝胶法制备出干凝胶,再引入纺丝助剂聚乙烯吡咯烷酮(PVP)和助溶剂N,N-二甲基甲酰胺(DMF)制成静电纺丝溶液,利用多针头同轴静电纺丝法制备镁铝尖晶石凝胶-PVP前驱体纤维,经900℃煅烧合成出多孔镁铝尖晶石纤维。借助XRD和SEM研究了PVP用量(3、4和5 g)、阳离子浓度(0.216、0.288和0.360 mol·L~(-1))、静电纺丝电压(22、24和26 k V)及内液流速(0.1、0.3和0.5 m L·h~(-1))对多孔镁铝尖晶石纤维相组成和形貌的影响。结果发现:当PVP用量为4 g,阳离子浓度为0.288 mol·L~(-1),纺丝电压为24 k V,内液流速为0.3 m L·h~(-1)时,纤维物相为纯镁铝尖晶石相,纤维连续,并呈现明显的多孔结构。
[Abstract]:In order to prepare porous magnesia-aluminum spinel fibers, anhydrous aluminum chloride, anhydrous magnesium chloride, anhydrous ethanol and dichloromethane were used as raw materials to prepare xerogel by non-hydrolytic sol-gel method. The spinning agent polyvinylpyrrolidone (PVP) and the co-solvent NN- dimethylformamide (DMF) were introduced to prepare the electrospinning solution. The precursor fibers were prepared by multi-needle coaxial electrospinning. Porous magnesia-aluminum spinel fibers were synthesized by calcination at 900 鈩，
本文编号：2250098
[Abstract]:In order to prepare porous magnesia-aluminum spinel fibers, anhydrous aluminum chloride, anhydrous magnesium chloride, anhydrous ethanol and dichloromethane were used as raw materials to prepare xerogel by non-hydrolytic sol-gel method. The spinning agent polyvinylpyrrolidone (PVP) and the co-solvent NN- dimethylformamide (DMF) were introduced to prepare the electrospinning solution. The precursor fibers were prepared by multi-needle coaxial electrospinning. Porous magnesia-aluminum spinel fibers were synthesized by calcination at 900 鈩，
本文编号：2250098
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