writer：HONG-Zan Song?, Zhi-Qiang Luo, Chun-Zheng Wang, Xue-Fang Hao, Jun-Gang GaoCollege
keywords：CelluloseIonic liquidNano-SiO2Bionano
source：期刊
specific source：Carbohydrate Polymers 98 (2013) 161– 167
Issue time：2013年
Microcrystalline cellulose (MCC)/nano-SiO2composite fibers were processed from solutions in 1-allyl-3-methylimidazolium chloride (AMIMCl) by the method of dry-jet wet spinning. The oscillatory shearmeasurements demonstrated that the gel network formed above 10 wt% nano-SiO2and the complexviscosity increased with increasing nano-SiO2. Remarkably, the shear viscosity of the nanofluids was evenlower than solutions without nano-SiO2under high shear rates. Scanning electron microscopy (SEM) andtransmission electron microscopy (TEM) images revealed that well-dispersed particles exhibit stronginterfacial interactions with cellulose matrix. Measurements on wide-angle X-ray diffraction (WAXD)indicated that the regenerated cellulose and nanocomposite fibers were the typical cellulose II crystallineform, which was different from the native cellulose with the polymorph of Type I. The tensile strength ofthe nanocomposite fibers was larger than that of pure cellulose fiber and showed a tendency to increaseand then decrease with increasing nano-SiO2. Furthermore, the nanocomposite fibers exhibited improvedthermal stability.