论文部分内容阅读
采用四氢呋喃和无水乙醇为溶剂,利用静电纺丝法制备了聚己内酯(PCL)/聚乙二醇(PEG)共混纳米纤维。研究了共混配比、溶液浓度、无水乙醇的加入以及电纺电压、接收距离等工艺参数对纤维形态和性能的影响。测试结果表明:聚乙二醇和聚己内酯以一定比例共混后改善了聚己内酯纤维毡的亲水性和细胞相容性;随着纺丝原液浓度增加,电纺产品由高分子微/纳米液滴结构渐变为珠状结构较少的平滑纤维,平均纤维直径逐渐增大;一定范围内,纤维平均直径随电压的上升而增大,但与接收距离关系不大;此外,加入无水乙醇后,共混溶液电导率增加,有利于喷射流的劈裂,减少了珠状结构的数量。
Polycaprolactone (PCL) / polyethylene glycol (PEG) nanofibers were prepared by electrospinning using tetrahydrofuran and ethanol as solvents. The effects of blending ratio, concentration of solution, addition of absolute ethanol, and electrospinning voltage and receiving distance on the morphology and properties of the fibers were investigated. The test results show that polyethylene glycol and polycaprolactone blend to improve the hydrophilicity and cell compatibility of polycaprolactone fiber mat in a certain proportion; as the concentration of the spinning dope increases, the electrospun product consists of polymer The diameter of micro / nano droplet gradually changed into a smooth fiber with fewer beads and the average fiber diameter increased gradually. Within a certain range, the average fiber diameter increased with the increase of voltage but not with the receiving distance. In addition, After the ethanol is added, the conductivity of the blended solution increases, which is favorable for the splitting of the jet stream and reduces the number of bead-like structures.