Abstract
Abstract In this article, polyacrylonitrile (PAN) and two kinds of graphene oxide (GO) with different structural properties are blended in dimethyl sulfoxide (DMSO) according to a certain ratio to prepare stable-spinning solution. One kind of GO is purchased, and we call it GO1. The other is a kind of self-made GO with liquid crystal property in solution, which is called GO2. The effects of two kinds of GO on the rheological properties of PAN/GO spinning solution (15 wt%) were studied. The results show that the viscous activation energy of the liquid crystal GO2/PAN blend solution is significantly higher than that of the nonliquid crystal GO1/PAN blend solution. Moreover, the liquid crystal system is more obviously affected by temperature. The structural viscosity index of the liquid crystalline GO2/PAN solution is obviously lower than that of the GO1/PAN solution. It indicates that the existence of liquid crystallinity is beneficial to the spinning of the solution. In the low-frequency region, the addition of GO1 makes the solution more elastic, and the addition of GO2 makes the solution more viscous.
Highlights
In this article, polyacrylonitrile (PAN) and two kinds of graphene oxide (GO) with different structural properties are blended in dimethyl sulfoxide (DMSO) according to a certain ratio to prepare stable-spinning solution
ARES-RFS-type (TA, USA) advanced rotary rheometer was used to test the rheological properties of PAN/GO/ DMSO spinning dope
Since the oxygen-containing functional groups on GO are mainly epoxy, carbonyl, carboxyl, and hydroxyl, the main elements are C, H, and O. It can be seen from the table that GO2 has a higher O element content than GO1, indicating that GO2 contains more functional groups than GO1. It indicates that the dispersion of GO2 in water and organic solvents is better than that of GO1, which will play a positive role in the preparation of spinning solution with a good dispersion
Summary
Abstract: In this article, polyacrylonitrile (PAN) and two kinds of graphene oxide (GO) with different structural properties are blended in dimethyl sulfoxide (DMSO) according to a certain ratio to prepare stable-spinning solution. The effects of two kinds of GO on the rheological properties of PAN/GO spinning solution (15 wt%) were studied. Graphene oxide (GO) is a twodimensional (2D) layered structure, which induces PAN molecules to align along the fiber axis during the spinning process. It contains oxygen-containing functional groups on its surface, which can be well dispersed in organic solvents [4]. The effect of liquid crystal graphene oxide 429 factors on the rheological behavior of PAN/GO blending solution were studied. The effect of carbon materials on the rheological properties of PAN spinning solution has been partially studied [6,7,8]. It was placed in an oven at 70°C for 48 h to obtain a well-mixed spinning dope
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