摘要
静电纺丝素纤维毡在水中极不稳定,力学性能较差,这些缺陷限制了其应用。将经过酸处理的多壁碳纳米管(MWNTs)均匀地分散在丝素膜甲酸溶液中,以MWNTs增强静电纺丝素纳米纤维。XPS的测定结果显示,碳纳米管并不是仅仅以物理形式混杂在丝素纤维中,而是形成了某些有助于提高增强效果的化学键。随碳纳米管质量分数的增加,纤维直径明显下降,纤维内部结构的规整性有所提高。当纺丝液中MWNTs的质量分数小于1.0%时,复合纤维毡的断裂强度和初始模量都有明显的增强,但是MWNTs的质量分数太大时,力学性能反而恶化。
Electrospun silk fibroin fiber mats have some drawbacks,such as instability in water and poor mechanical properties,that limit its applications.The acid treated MWNTs were dispersed in silk fibroin / formic acid to reinforce the electrospun silk nanofibers.XPS analysis indicated that MWNTs not only mixed with silk matrix physically but formed certain chemical bonds with it,thus reinforcing the matrix.With the increase of mass concentration of MWNTs,the microstructure of the fiber was improved and the regularity inside the fiber was enhanced.When the mass concentration of the MWNTs was less than 1%,the fracture strength and initial modulus of composite fiber mat were increased significantly with the increasing of mass fraction of MWNTs.But if the mass concentration of MWNTs was too high,the mechanical property would be deteriorated.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2010年第6期1-6,共6页
Journal of Textile Research
基金
教育部科学技术研究重点项目(2006056)
江苏省自然科学基金资助项目(BK2008151)
关键词
多壁碳纳米管
静电纺丝
再生丝素
力学性能
微观结构
MWNTs
electrospinning
regenerated silk fibroin
mechanical property
microstructure
