Xiang Chunhui, Frey Margaret W
Department of Apparel, Events and Hospitality Management, Iowa State University, Ames, IA 50011, USA.
Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853, USA.
Materials (Basel). 2016 Apr 7;9(4):270. doi: 10.3390/ma9040270.
Tensile strength, Young's modulus, and toughness of electrospun nylon 6 non-woven fiber mats were improved by increasing individual nanofiber strength and fiber-fiber load sharing. Single-walled carbon nanotubes (CNTs) were used as reinforcement to increase the strength of the electrospun nylon 6 nanofibers. Young's modulus, tensile strength, and toughness of the nylon 6 non-woven fiber mats electrospun from 20 wt % solutions increased 51%, 87%, and 136%, respectively, after incorporating 1 wt % CNTs into the nylon 6 nanofibers. Three methods were investigated to enhance fiber-fiber load sharing: increasing friction between fibers, thermal bonding, and solvent bonding. The addition of beaded nylon 6 nanofibers into the non-woven fiber mats to increase fiber-fiber friction resulted in a statistically significantly increase in Young's modulus over comparable smooth non-woven fiber mats. After annealing, tensile strength, elongation, and toughness of the nylon 6 non-woven fiber mats electrospun from 20 wt % + 10 wt % solutions increased 26%, 28%, and 68% compared to those from 20 wt % solutions. Solvent bonding with formic acid vapor at room temperature for 30 min caused increases of 56%, 67%, and 39% in the Young's modulus, tensile strength, and toughness of non-woven fiber mats, respectively. The increases attributed to increased individual nanofiber strength and solvent bonding synergistically resulted in the improvement of Young's modulus of the electrospun nylon 6 non-woven fiber mats.
通过提高单根纳米纤维的强度以及纤维与纤维之间的载荷分担，静电纺尼龙6非织造纤维毡的拉伸强度、杨氏模量和韧性得到了改善。使用单壁碳纳米管（CNT）作为增强材料来提高静电纺尼龙6纳米纤维的强度。在尼龙6纳米纤维中加入1 wt%的CNT后，由20 wt%溶液静电纺制的尼龙6非织造纤维毡的杨氏模量、拉伸强度和韧性分别提高了51%、87%和136%。研究了三种增强纤维与纤维之间载荷分担的方法：增加纤维间的摩擦力、热粘合和溶剂粘合。在非织造纤维毡中添加串珠状尼龙6纳米纤维以增加纤维间的摩擦力，与可比的光滑非织造纤维毡相比，杨氏模量有统计学上的显著提高。退火后，由20 wt% + 10 wt%溶液静电纺制的尼龙6非织造纤维毡的拉伸强度伸长率和韧性与由20 wt%溶液静电纺制的相比分别提高了26%、28%和68%。在室温下用甲酸蒸汽进行30分钟的溶剂粘合，使非织造纤维毡的杨氏模量、拉伸强度和韧性分别提高了56%、67%和39%。归因于单根纳米纤维强度增加和溶剂粘合的这些提高协同导致了静电纺尼龙6非织造纤维毡杨氏模量的改善。
