摘要
改进了一种实芯针纺丝头,分析了实芯针纺丝头与普通纺丝头的区别,考察了不同离子浓度、接收距离、场强分布等电纺工艺参数对聚乙烯吡咯烷酮(PVP)静电纺丝纳米纤维直径的影响,制备出小直径连续均匀的PVP纳米纤维,解决电纺过程中针头易堵塞问题。结果表明:改进的实芯针纺丝头可以有效地防止纺丝头堵塞,减小泰勒锥,制备出小直径的纳米纤维;当添加的LiCl浓度为5%(w/V),接收距离为18 cm时,所制备PVP纳米纤维直径最小,最小直径为190 nm、186 nm;射流喷射方向与场强变化方向一致,纺丝头末端与电场中均存在尖端效应。考察了纳米纤维膜动态水接触角,表明所制备PVP纳米纤维膜具有较强亲水性,小直径PVP纳米纤维膜润湿性能更强。
Improved on a solid core needle spinning top, solid core is analyzed the difference between the nozzle and ordinary nozzle needle, examines the different ion concentration, receiving distance, field intensity distribution of electrospinning process parameters on polyvinylpyrrolidone(PVP) electrostatic spinning of nanofibers, the influence of diameter were small diameter continuously even PVP nanofibers, solve the problem of needle easily blocked in the process of electrospinning. The results show that the improved solid core needle spinning head can effectively prevent the spinning head clogging, reduce the Taylor cone, and prepare nanofibers with small diameter. When the LiCl concentration was 5%(w/V) and the receiving distance was 18 cm, the diameter of the prepared PVP nanofibers was the smallest, 190 nm and 186 nm. It is proved that the direction of jet injection is consistent with the direction of field intensity, and tip effect exists in the end of spinning head and electric field. Finally, the dynamic water contact Angle of the nanofiber membrane was studied, which showed that the prepared PVP nanofiber membrane had strong hydrophilicity, and the wettability of small diameter PVP nanofiber membrane was stronger.
作者
田亮
陈泽中
TIAN Liang;CHEN Ze-zhong(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《广州化学》
CAS
2022年第6期57-65,共9页
Guangzhou Chemistry
关键词
实芯针纺丝头
静电纺丝
聚乙烯吡咯烷酮(PVP)
LiCl浓度
接收距离
场强分布
solid core needle spinning head
electrostatic spinning
polyvinylpyrrolidone(PVP)
LiCl concentration
receiving distance
the field intensity distribution
