摘要
基于氟元素的低表面能作用,采用单喷头电纺制备聚偏氟乙烯(PVDF)/聚丙烯腈(PAN)核壳结构纳米纤维膜,并考察不同混合比例对核壳结构纤维的影响。通过扫描电镜表征纤维的微观结构;透射电镜、X射线光电子能谱仪表征纤维的核壳结构;衰减全反射红外光谱、差示扫描量热仪和热重分析仪表征纤维膜的晶型和热力学性质;MTT法表征纤维膜的毒性。结果表明,PAN的加入可有效降低PVDF分子之间的链缠结作用,形成清晰的核壳结构,壳层为PVDF,核层为PAN;纤维膜中的PVDF以β相为主且无毒,加上纤维膜优良的热力学性能,使其在伤口敷料领域有潜在的应用。
The polyvinylpyrrolidone（PAN）/poly（vinylidene fluoride）（PVDF）core-shell nanofiber mats with superhydrophobic surface were prepared via electrospinning its homogeneous blending solutions,and the core-shell structure was achieved by thermal induced phase separation assisted with low surface tension of PVDF.The electrospinnability of blending solutions was also investigated by varying the blending ratio of PAN and PVDF,and it is enhanced with the increase of PAN content.The SEM and TEM results show that the nanofiber size is varied in the range of 100 nm to 600 nm with smooth surface and core-shell structure.The composition of the shell layer was determined by the XPS analysis,which indicates that the PVDF is concentrated in the shell layer of the nanofiber.The crystalline and thermodynamic properties of the nanofiber were characterized by attenuated total reflection infrared spectroscopy（ATR-IR）,differential scanning calorimetry（DSC）and thermal gravimetric analysis（TGA）,and the toxicity of nanofiber membrane was measured by MTT.The results show that PAN can reduce effectively the PVDF molecular chain entanglement and form a clear core-shell structure,the shell layer is PVDF and the core layer is PAN;the nanofiber mats have a potential application in the field of wound dressing because the nanofiber membranes are non-toxic and own the excellent thermal performance.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第10期140-145,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(21304005)
江苏省自然科学基金资助项目(BK20131145)
关键词
静电纺丝
聚偏氟乙烯
核壳结构
纳米纤维
electrospinning
poly（vinylidene fluoride）
core-shell
nanofiber
