Microstructure of PAN Precursor Fibers in Wet-spinning

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Journal of Materials Engineering ›› 2009, Vol. 0 ›› Issue (7) : 50-53.

Microstructure of PAN Precursor Fibers in Wet-spinning

GE He-yi, LIU Hua-shi, CHEN Juan

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Abstract

The morphology and the structural interrelationship of PAN fibers in wet-spinning have been analyzed by the means of Scanning Electron Microscope(SEM) and Transmission Electron Microscopy(TEM).The results indicated that the structure of PAN precursor fibers was inherited from that of nascent fibers.PAN precursor fibers were composed of four parts.The sheet-like skin which had high crystallization and highly oriented structure was compact and homogeneous.The core which had low crystallization was loose and disorderly.Meanwhile,the precursor fibers had a pillar-like layered structure along the fiber axis.From the skin to the endothecium,the average thickness of each layer increased gradually.Furthermore,a structural model of PAN precursor fibers has been established.

Key words

PAN / morphology / structure / model

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GE He-yi, LIU Hua-shi, CHEN Juan. Microstructure of PAN Precursor Fibers in Wet-spinning[J]. Journal of Materials Engineering, 2009, 0(7): 50-53

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