摘要
采用熔融共混法制备了不同质量分数的羧基化多壁碳纳米管(CMWNTs)/聚己二酸己二胺(PA66)切粒,并将切粒熔融纺丝制成CMWNTs/PA66复合纤维。采用SEM、DMA和单纤维电子强力仪等研究了CMWNTs对复合纤维形貌和力学性能的影响。CMWNTs在纤维中沿纤维轴向束状分布均匀。CMWNTs的加入提高了PA66纤维的力学性能和玻璃化温度。CMWNTs的质量分数为0.5%时,CMWNTs/PA66复合纤维的储能模量最大,为PA66纤维的5.5倍;玻璃化温度提高了27.6℃。CMWNTs的质量分数为0.3%时,复合纤维的初始模量最大,比PA66纤维增加了101.4%。当CMWNTs的质量分数为1%时,复合纤维的断裂强度最大,与纯PA66相比增加了48.8%。
A series of CMWNTs/PA66 composite fibers were melt-spun with the melt-blended PA66 and 0.1 wt%-3 wt% of carboxylic multi-walled carbon nanotubes chips.The effects of CMWNTs mass fraction on the morphology and mechanical properties of the composite fibers were characterized using SEM,DMA and a tensile strength tester etc.The results show that the CMWNTs are homogeneously dispersed throughout PA66 matrix.Both the Tg and mechanical properties of the composite fiber increase due to the addition of CMWNTs.When the mass fraction of CMWNTs is 0.5%,the storage modulus of CMWNTs/PA66 composite fiber is the highest,which is 5.5 times that of PA66 fiber.The glass transition temperature of the fiber is 27.6 ℃.When the mass fraction of CMWNTs is 0.3%,the initial modulus of CMWNTs/PA66 composite fiber is the highest with an increase of 101.4%.When the mass fraction of CMWNTs is 1%,the breaking strength is the largest with an increase of 48.8%.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第2期16-21,共6页
Acta Materiae Compositae Sinica
基金
天津市应用基础与前沿重点研究计划项目(09JCZDJC22300)
天津市高等学校科技发展基金计划项目(2006ZD39)
关键词
碳纳米管
PA66纤维
熔融共混
力学性能
carbon nanotubes
polyamide 66
melt-blended
mechanical properties
