Study on Preparation, Structure and Properties of Polyacrylonitrile/Boron Nitride Hybrid Composite Fibers via Electrospinning
WANG Yanzhi1,2,3, ZHANG Lingjie3,4, ZHANG Yifeng1,2, ZHANG Wangxi3,4
1 School of Textile, Zhongyuan University of Technology, Zhengzhou 451191, China 2 Collaborative Innovation Center of Textiles and Fashion, Zhengzhou 451191, China 3 Henan Research Center on Diamond Carbon Engineering Technology, Zhengzhou 451191, China 4 School of Materials & Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 451191,China
Abstract: 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)).
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