凝胶纺壳聚糖分散碳纳米管/聚丙烯腈纤维的研究

多壁碳纳米管(MWNTs)通过壳聚糖衍生物处理后与超高分子量聚丙烯腈进行复合,将得到的复合材料通过凝胶纺丝法制备出不同复合比例的MWNTs/聚丙烯腈纤维.将不同纺丝方法以及不同比例MWNTs对拉伸强度、模量、取向度、结晶结构的影响进行比较研究,同时通过电镜观察MWNTs的分散状况.结果表明:相比于湿法纺丝,通过凝胶纺丝法制备的复合纤维,MWNTs取向更好,分散更为均匀,纤维拉伸强度、模量都得到显著提高.对比未加MWNTs的对照样,在这个体系中加入质量分数为0.5%的MWNTs复合时,拉伸强度提高37%,弹性模量提高11.68%,并且声速取向度维持在相当高的水平(92.5%).

Studies on Gel-spinning of Chitosan Dispersion Carbon Nano-tubes/polyacrylonitrile Composite Fibers

After being treated by chitosan derivatives,the multi-walled carbon nano-tubes (MWNTs) were composited with ultimate high molecular weight polyacrylonitrile (UHMW-PAN).And then spin a series concentration of MWNTs proportion of MWNTs/PAN composite fibres via gel-spinning.Study on the effect of different methods of spinning,and the different proportion of multi-walled carbon nano-tubes on the tensile strength,modulus,orientation,crystallization structure.And the dispersion of MWNTs in PAN was observed by scan electron microscope.The result shows that:compared to wet-spinning fibers,the gel-spinning fibers have better orientation,dispersion,tensile strength and modulus.And the composited with carbon nano-tubes would engender the impact of sonic orientation of the fibers.While the mass fraction of MWNTs is 0.5%,compare to the PAN fibers,the tensile strength increase 37%,Young's modulus increase 11.68%,and the degree of sonic orientation is highly maintained (92.5%).