Hao Fong 教授已在包括Chemistry of Materials, Macromolecules等学术期刊上发表SCI论文60余篇，撰写专著3部（含部分章节）。已在世界各地做过60余次学术报告。他论文中展示的直径3纳米的聚合物纤维的透射电镜(TEM)照片被选作美国高分子科学学报"Journal of Polymer Science, Part B: Polymer Physics" 的封面长达两年(2000 和2001年)。他在POLYMER 40 (16): 4585-4592，1999上发表的论文“Beaded nanofibers formed during electrospinning”在JOURNAL OF APPLIED PHYSICS 87 (9): 4531-4547，2000上发表的论文“Bending instability of electrically charged liquid jets of polymer solutions in electrospinning ”已分别被引用543次和592次。担任美国化学会第226次会议“高分子纳米纤维”专题会议的组织者(New York, September 7-12, 2003)。

 

ABSTRACT

 

The fast developing technology of electrospinning is a unique and straightforward method for convenient fabrication of polymeric, ceramic, metallic, and carbonaceous fibers with diameters down to the nanometer range (ca. 10-1000 nm).  Electrospun nanofibers possess many extraordinary properties including small diameter and the related large specific surface area, ordered molecular/crystalline orientation and the resulting superior properties.  In electrospinning, electric force alone is applied to drive the spinning process and produce the nanofibers.  Polymer nanofibers are electrospun directly from their solutions or melts.  Ceramic nanofibers are made by electrospinning the solutions containing precursors of ceramics (and carrying polymers) followed by high temperature pyrolysis.  Metallic nanofibers/nanotubes are made by using the polymeric and/or ceramic nanofibers as the templates.  Carbon/graphite nanofibers are made through stabilization and carbonization/graphitization of polymer nanofiber precursors.  Unlike nanorods, nanotubes, and nanowires, which are discontinuous, produced mostly by synthetic bottom-up methods, and usually require further expensive purifications, electrospun nanofibers are continuous and produced through a top-down nano-manufacturing process.  This results in low-cost electrospun nanofibers that are also relatively easy to align, assemble, and process into applications.  Additionally, electrospun nanofibers can be prepared with different morphologies (e.g. cylinder-shaped, beaded, wrinkled, foamed, and ribbon-shaped); various nanofillers (e.g. layered silicates and carbon nanotubes) can be readily incorporated into electrospun nanofibers with the filler particles closely aligned with the nanofiber axes.  Furthermore, the mat/felt made of electrospun nanofibers offers unique capabilities to control the porosity.  Therefore, electrospun nanofibers have been of significant scientific, military, and commercial interests including, but not limited to, composites, filtration, catalysis, biomedical applications (e.g. tissue engineering and drug delivery), electronic applications (e.g. capacitors, transistors and diodes), and aeronautics and space applications (e.g. extremely high-performance composite structures).  This talk will focus on discussing about the technology, applications, and current obstacles/bottlenecks of “Electrospinning and Nanofibers” and their potential solutions.  Additionally, the structure/property relationships of polymer, ceramic, and carbon/graphite nanofibers, and the post-electrospinning processes (e.g. stretching, crosslinking, and under-tension stabilization, and carbonization/graphitization) will also be discussed.