摘要
借助ANSYS软件模拟聚对苯二甲酸乙二酯(PET)熔体静电纺丝在不同参数(纺丝电压、接收距离、接收板面积)条件下的电场分布,探讨电场分布对熔体静电纺丝PET射流运动与纤维形貌的影响。结果表明,在单喷嘴–平板结构模型中,提高纺丝电压将增强整体空间电场强度,使电场对PET熔体射流的控制力加强,PET熔体射流的摆动半径减小,当纺丝电压由24 k V升高到30 k V时,摆动半径由11.7 mm减至9.9 mm,而摆动角增大,由10.1°增至11.2°,PET纤维直径显著减小,由3.275μm减至2.202μm;接收距离的改变对接收板表面电场的影响显著,随着接收距离的增加,PET射流的直线段比例明显下降,当接收距离由50 mm增加至90 mm时,PET熔体射流的直线段比例由68.0%减至54.0%,PET纤维直径在适中接收距离(70 mm)下表现较细,可达2.184μm;接收板面积的减小加强了对PET熔体射流的控制,使PET熔体射流直线段比例显著增加,当接收板面积由15 cm×15 cm减小至10 cm×10 cm时,PET熔体射流直线段比例由68.0%增加至82.6%,摆动半径减小,由9.9 mm减至4.2 mm,沉积角因PET熔体射流贴服接收板而减小,由12.2°减至9.1°,PET纤维直径稍有增加,由2.202μm增加至2.537μm。
Electric field distributions under different parameters conditions （spinning voltage, accepted distance and collector area） in melt-electrospinning process were simulated by ANSYS software, the effects of electric field distribution on poly（ethylene terephthalate） （PET） jet motion and fiber morphologies were investigated. The results show that in the single nozzle-plate structure model, when improving spinning voltage, the whole space electric field intensities becomes enhanced and their control on jet gets enlarged as well. When the spinning voltage increases from 24 kV to 30 kV, the PET melt jet whipping radius decreases from 11.7 mm to 9.9 mm, while whipping angle increases from 10.1 ° to 11.2°, and the PET fiber diameter decreases significantly from 3.275 μm to 2.202μm. The changes of accepted distance apparently affectes the electric field on the collector surface, increasing accepted distance would decrease the PET melt jet straight segment proportion. When the accepted distance increases from 50 mm to 90 mm, the PET melt jet straight segment proportion decreases from 68.0% to 54.0%, and the fiber shows a small diameter （2.184 μm） with a moderate accepted distance （70 mm）. Decreasing the collector area could enhance control of the PET melt jet motion, increase the PET melt jet straight segment proportion. When collector area decreases from 15 cm × 15 cm to 10 cm × 10 cm, the PET melt jet straight segment proportion increases from 68.0 % to 82.6 %, and whipping radius decreases from 9.9 mm to 4.2 mm, depositing angle decreases from 12.2° to 9.1 ° with the jet closed to collector, while PET fiber diameter increases slightly from 2.202 μm to 2.537 μm.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2016年第2期61-67,共7页
Engineering Plastics Application
基金
国家高技术研究发展计划(863)资助项目(2012AA030313)
江苏省产学研联合创新资金前瞻性研究项目(BY2014023-06)
关键词
熔体静电纺丝
聚对苯二甲酸乙二酯纤维
电场分布
射流运动
纤维形貌
melt-electrospinning
poly（ethylene terephthalate） fiber
electric field distribution
jet motion
fiber morphology
