摘要
使用超声波处理器对百分比含量为1.75%和2.0%超高分子量聚乙烯（UHMWPE）溶液在20kHz频率条件下分别进行2～10min的超声波振动处理,然后进行静电纺丝实验。扫描电镜（SEM）观察结果表明,超声波振动处理10min可使两种纤维的直径分别由未振动时的2487nm和3577nm降低到772nm和1169nm,且纤维表面光滑;对质量分数为2.0%的UHMWPE纤维的X-射线衍射（XRD）图谱对比分析结果表明,超声波振动10min可使纤维出现典型的PE的（110）和（200）晶面,结晶度由原来的1.04%提高到12.69%;纤维的强力拉伸性能测试结果表明,经过超声波振动10min,两种纤维的比应力分别由3.2cN/den和3.7cN/den增加到6.2cN/den和6.9cN/den。
1.75wt% and 2.0wt% ultra high molecular weight polyethylene（UHMWPE）solution were ultrasonically treated for 2-10 min at 20 kHz respectively and electrospun into ultrafine fibers.The scanning electron microscopy（SEM）results showed that ultrasonic vibration treatment significantly attenuated the diameter of the UHMWPE fibers.After 10 min treatment,the diameter of the fiber fabricated from 1.75wt% and 2.0wt% UHMWPE solutions decreased from 2487 nm and 3577 nm to 772 nm and 1169 nm respectively,the surface of the obtained fibers became smoother as well.X-ray diffraction（XRD）analysis of the fibers electrospun from 2.0wt% UHMWPE solutions indicated that the crystallinity increased with the increasing vibration time,after 10 min treatment,the character peaks of PE crystals in（110）and（200）crystal planes were observed,and the crystallinity significantly increased from 1.04%to 12.69%.Tensile testing results of the two types of electrospun UHMWPE fiber bundles showed that the specific stresses of the fiber bundles increased from 3.2cN/den and3.7cN/den to 6.2cN/den and 6.9cN/den respectively with 10 min vibration treatment.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第2期30-32,共3页
New Chemical Materials
基金
国家自然科学基金(青年基金)(51203066)
生态教育部重点实验室(江南大学)开放性课题基金(KLET1007)
东华大学纤维材料改性国家重点实验室开放性课题基金(LK1005)
作者简介
杨丽娜（1988-），女，硕士，研究方向：功能纺织材料。
联系人：万玉芹，副教授。
