摘要
针对聚合物材料导热性差的问题,为了改善聚合物填充复合材料的导热和吸附等性能,以聚丙烯腈和氮化硼为原料,利用静电纺丝方法制备了聚丙烯腈/氮化硼(PAN/BN)有机无机杂化复合纤维。采用扫描电镜、热分析、红外光谱、X射线衍射仪、激光导热仪和比表面积及孔隙度分析仪对复合纤维进行了结构和性能表征。实验通过改变聚丙烯腈和氮化硼在纺丝溶液中的质量比,研究了纤维中不同氮化硼含量对复合纤维形态、结构和性能的影响。结果表明,通过静电纺丝能够把氮化硼包覆并均匀分散在聚丙烯腈聚合物中,可有效改善聚合物的导热和吸附性能。随着纤维中氮化硼含量的增加,材料的热导率增加,当BN质量分数为54.5%时,纺制得到的PAN/BN杂化复合纤维的热导率最高达到3.977 W/(m·K),比热导率为0.048 W/(m·K)的纯PAN纤维高82.8倍左右。
In order to improve the thermal conductivity and adsorption properties of polymers,the polyacrylonitrile/boron nitride(PAN/BN)hybrid fibrous composites were obtained via electrospinning.The structures and properties of PAN/BN fibrous composites were characterized by field emission scanning electron microscopy,fourier transform infrared,differential scanning calorimetry,X-ray diffraction,laser flash analyzer and accele-rated surface area porosimetry system.The influences of different content of BN on the morphology and properties of the resulting composite fibers were studied by changing the weight ratio of polyacrylonitrile and BN.The results show that electrospinning can solve the problem of uniform dispersion of sub-micron boron nitride in polyacrylonitrile,and improve the thermal conductivity and adsorption performance of which effectively as well.The thermal conductivity increases with the increase of boron nitride content in the comoposite fibers.When the actual content of boron nitride is 54.5wt%,the thermal conductivity of the spun PAN/BN composite fibers reaches 3.977 W/(m·K),which is about 82.8 times higher than that of the pure PAN fibers(only 0.048 W/(m·K)).
作者
王艳芝
张玲杰
张一风
张旺玺
WANG Yanzhi;ZHANG Lingjie;ZHANG Yifeng;ZHANG Wangxi(School of Textile,Zhongyuan University of Technology,Zhengzhou 451191,China;Collaborative Innovation Center of Textiles and Fashion,Zhengzhou 451191,China;Henan Research Center on Diamond Carbon Engineering Technology,Zhengzhou 451191,China;School of Materials&Chemical Engineering,Zhongyuan University of Technology,Zhengzhou 451191,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第12期12158-12162,共5页
Materials Reports
基金
国家自然科学基金(11472316)
河南省科技创新优秀团队(CXTD2013048)
河南省教育厅自然科学重点项目(19A430031,18A430035)。
关键词
静电纺丝
聚丙烯腈
氮化硼
复合纤维
导热性能
吸附
electrospinning
polyacrylonitrile
boron nitride
fibrous composites
thermal conductivity property
adsorption
