【作者】 李大伟； 陈维明； 柯勤飞； 莫秀梅；

【Author】 Dawei Li;Weiming Chen;Qinfei Ke;Xiumei Mo;College of Chemistry, Chemical Engineering and Biotechnology, Donghua University;Engineering Research Center of Technical Textiles, Donghua University;Shanghai Normal University;

【机构】 化学化工与生物工程学院,东华大学； 纺织学院,东华大学； 上海师范大学；

【摘要】 静电纺丝技术是目前最为常用的制备纳米纤维的技术,然而其产率较低无法满足产业化生产的需要。无针静电纺丝技术能够将纳米纤维的产率提高几十甚至上百倍[1]。本研究中,我们利用圆盘无针静电纺丝设备制备出均匀的聚己内酯(PCL)/明胶复合纳米纤维。将PCL和猪皮明胶(质量比为1:1)溶解于三氟乙醇溶液中,搅拌均匀,其中一组滴加少量乙酸溶液。随后利用圆盘无针纺丝设备进行静电纺丝。实验结果表明,乙酸能够显著提高PCL/明胶溶液在无针静电纺丝中的可纺性。在不添加乙酸的情况下,会发生液滴喷溅的现象,所得到的PCL/明胶纳米纤维平均直径为590.0±514.8 nm,纤维不匀率较高。在相同条件下,加入乙酸之后,PCL/明胶溶液变得清澈透明,纺丝过程中,泰勒锥形态非常稳定,所得到的PCL/明胶纳米纤维直径为316.1±163.7 nm,较没有添加乙酸的纤维形态更为均匀,纤维直径也显著降低。更多还原

【Abstract】 Electrospinning is a widely used method to fabricate nanofiber. However, the low production rate limited its commercialization. Needleless or needle-free electrospinning can increase the production rate of nanofiber by tens to hundreds times [1]. In this study, polycaprolactone(PCL)/Gelatin composite nanofiber was electrospun using a homemade disc-electrospinning setup. PCL and Gelatin was dissolved in trifluoroethanol(TFE), one group of which was added with several drop of acetic acid. The results indicated the addition of acetic acid could significantly improve the spinnability of PCL/Gelatin during disc-electrospinning. With acetic acid, PCL/Gelatin nanofiber showed more uniform morphology and thinner diameter with a narrower diameter distribution.更多还原