熔体静电纺聚对苯二甲酸乙二酯纤维膜分层结构的形成分析  

Formation of Layering Structure of Poly(Ethylene Terephthalate)Fiber Film by Melt-Electrospinning

作　　者：王宏[1] 徐阳[1] 宋明玉[1] 杜泽静 魏取福[1] 

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122

出　　处：《高分子材料科学与工程》2015年第11期114-118,共5页Polymer Materials Science & Engineering

基　　金：国家高技术研究发展计划(863)资助项目(2012AA030313);2012江苏科技支持计划(工业)项目(SBE201201094);江苏省产学研联合创新资金前瞻性研究项目(BY2014023-06)

摘　　要：熔体静电纺聚对苯二甲酸乙二酯(PET)纤维膜具有明显的分层行为。利用高速摄影观察纺丝过程中PET熔体射流末梢沉积位置的变化,测量各圆形分层薄膜的半径、质量及纤维分布,借助扫描电镜探讨各层纤维薄膜的表面形貌。结果表明,由于沉积纤维膜中电荷的积累,PET射流间隔性地在纤维膜中心与边缘往返沉积,在纤维膜间形成具有分离作用的"束缚层"纤维,从而纤维膜形成分层结构;90min所纺纤维膜由内及外可自由分成13层同心圆薄膜,各纤维薄膜层半径线性增加,而质量波动性分段增加,且外层纤维膜表现为"中心薄、边缘厚";各层薄膜内纤维平均直径约为2μm且分布均匀,由内及外各层薄膜纤维平均直径因电势差减小而略有增加,内层薄膜中纤维因面积较小且较厚,散热时间短而形成粘连结构。There is an apparent layering behavior of poly（ethylene terephthalate） （PET） fiber film by melt- electrospinning. The depositing location of the end of PET melt jet in melt-electrospinning was observed by high- speed photography device; then, the circular layered fiber sheets＇ radius, mass and fibers＇ distribution were measured; in addition, the fibers morphologies of layered fiber sheets were investigated by SEM. The results show that because of the accumulated electric charges in fiber film, PET jet deposits with reciprocating movement intermittently between center and side of fiber film, causing formation of binding layer fibers who have separating function and then producing the layering structure in fiber film. The PET fiber film electrospun in 90 min, from center to side, could be divided freely into 13 concentric fiber sheets, and the sheets＇ radius increases linearly while their mass increases unstably and piecewise, moreover, the outer layered films show the appearance of the thin center while the thick edge. The average fiber diameters of each layered film are about 2/~m and distribute evenly, besides, the fiber diameter of the layered films from center to side increases slightly due to the reduced electric potential difference; the self-bonded fibers in inner layered films are owing to the smaller and thicker film with short time for cooling the PET jet.

关 键 词：熔体静电纺 聚对苯二甲酸乙二酯纤维膜 束缚层 分层结构 

分 类 号：TQ342.21[化学工程—化纤工业]