摘要
以聚酰胺酸(PAA)为聚合物纺丝原料,通过静电纺丝法制备一系列Fe_3O_4添加量不同的PAA/Fe_3O_4纳米复合纤维膜,经亚胺化处理后得到聚酰亚胺(PI)/Fe_3O_4复合纤维膜。采用红外光谱、扫描电镜表征了纤维膜的微观形貌和结构,测试了纤维膜的热、力、电及磁性能,系统分析了Fe_3O_4含量及纺丝工艺对纤维膜结构和性能的影响。实验结果表明,PI/Fe_3O_4复合材料的红外谱图与纯PI膜基本一致,说明Fe_3O_4磁性纳米粒子的引入并未破坏PI分子的化学结构。当PI固含量为20%,Fe_3O_4质量分数为1%时,复合纤维膜珠节少,纤维成型良好且具有良好的热稳定性。随着Fe_3O_4含量的增加,Fe_3O_4在PI纤维中的团聚越来越严重,复合纤维膜的拉伸强度先增大后减小,断裂伸长率则逐渐减小。介电性能测试结果表明,PI/Fe_3O_4复合纤维膜的介电常数和介电损耗均小于PI膜且变化趋势平稳。Fe_3O_4的加入使PI/Fe_3O_4复合纤维膜具有明显的磁性,且随着Fe_3O_4含量的增加,其磁性逐渐增大。
PI/Fe3O4 nanocomposite fiber membrane with different Fe3O4 contents was prepared by eletrospinning technology.Using polyamide（PAA）as spinning feedstocks,the PI/Fe3O4 composite was obtained after amination treatment.The micro morphology and structure of the fiber film were characterized by Fourier transform infrared spectroscopy（FT-IR）,electron microscope（SEM）,the thermal,mechanical,eletricity and magnetic properties of the nanocomposite fibers were characterized,the effects of Fe3O4 content and spinning process on the structure and properties of fiber membrane were systematically analyzed.The result display that the infrared spectrum of PI/Fe3O4 fiber composites is consistent with PI composite,the introduction of Fe3O4 magnetic nanoparticles does not destroy the chemical structure of PI molecules,when the PAA/Fe3O4 solid content is 20%,the addition amount of Fe3O4 is 1%,PI/Fe3O4 composite fiber film has fewer beads,well formed and even thickness,which has good thermal stability.With the increase of Fe3O4 content,reunion is getting worse,the tensile strength first increases and then decreases,elongation at break decreases by degrees.The dielectric constant and dielectric loss are less than those of PI composite,moreover,the trend is steady.The magnetization test confirms that the composite fibers show a certain magnetic property.With the increase of Fe3O4 content,the magnetic properties increase gradually.
作者
董馨茜
刘立柱
翁凌
崔巍巍
Xinqian Dong;Lizhu Liu;Ling Weng;Weiwei Chui(School of Materials Science and Engineering,Harbin University of Science and Technology,Harbin 150080,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第8期161-166,172,共7页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51177030
51677045)
黑龙江省青年科学基金资助项目(QC2014C051)
国家自然科学基金青年基金资助项目(51603057)
