Enhancing the Mechanical Properties of Electrospun Nanofiber Mats through Controllable Welding at the Cross Points

被引:75
|
作者
Li, Haoxuan [1 ,2 ,3 ]
Zhu, Chunlei [1 ,2 ]
Xue, Jiajia [1 ,2 ]
Ke, Qinfei [3 ]
Xia, Younan [1 ,2 ,4 ]
机构
[1] Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
[2] Emory Univ, Atlanta, GA 30332 USA
[3] Donghua Univ, Coll Text, Key Lab Text Sci & Technol, Shanghai 201620, Peoples R China
[4] Georgia Inst Technol, Sch Chem & Biochem, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA
基金
美国国家卫生研究院;
关键词
electrospinning; mechanical properties; nanofibers; welding; POLY-EPSILON-CAPROLACTONE; SCAFFOLD; LINKING; FIBERS;
D O I
10.1002/marc.201600723
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
This communication describes a simple and effective method for welding electrospun nanofibers at the cross points to enhance the mechanical properties of their nonwoven mats. The welding is achieved by placing a nonwoven mat of the nanofibers in a capped vial with the vapor of a proper solvent. For polycaprolactone (PCL) nanofibers, the solvent is dichloromethane (DCM). The welding can be managed in a controllable fashion by simply varying the partial pressure of DCM and/or the exposure time. Relative to the pristine nanofiber mat, the mechanical strength of the welded PCL nanofiber mat can be increased by as much as 200%. Meanwhile, such a treatment does not cause any major structural changes, including morphology, fiber diameter, and pore size. This study provides a generic method for improving the mechanical properties of nonwoven nanofiber mats, holding great potential in various applications.
引用
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页数:5
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