Liquid crystalline phase behavior andfiber spinning of cellulose/ionic liquid/halloysite nanotubes dispersions
writer：Zhiqiang Luo, Aiqing Wang, Chunzheng Wang, Weichao Qin, Ningning Zhao, Hongzan Song*and Jungang Gao
keywords：ionic liquid，halloysite nanotubes
source：期刊
specific source：J. Mater. Chem. A
Issue time：2014年
Highly ordered, homogeneous and enhanced microcrystalline cellulose (MCC)/halloysite nanotubes (HNTs) composite fibers have been successfully prepared from MCC/1-allyl-3-methylimidazolium chloride (AMIMCl)/HNTs dispersions with liquid crystal (LC) phases by a wet-spinning method, and their structures, morphology, mechanical, thermal and water barrier properties were investigated. The results revealed that the dispersions displayed stronger birefringence with increasing HNTs content, and became intensely birefringent when sheared; the birefringence also persisted for minutes after shearing
was stopped. Rheological measurements showed that the dispersions had stronger shear thinning behavior. The thermal stability and tensile strength of the cellulose nanocomposite fibers were significantly improved compared with those of the pure MCC fiber. A more significant result is that the addition of HNTs significantly improved the moisture barrier properties of the regenerated MCCfibers. The abovefindings shed light on the liquid crystal phase behavior of HNTs dispersions and lay the foundation for fabrication of high performancefibers by liquid crystalline spinning.