Department of Textile Engineering, Centre of Excellence in Applied Nanotechnology, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan 84156-83111, Iran.
IET Nanobiotechnol. 2018 Sep;12(6):807-813. doi: 10.1049/iet-nbt.2018.0044.
This study reports the fabrication of cellulose nanoparticles through electrospraying the solution of cellulose in -dimethylacetamide/lithium chloride solvent as well as investigating the effect of electrospraying conditions and molecular weight on the average size of electrosprayed nanoparticles. Electrospraying of cellulose was carried out with the following range for each factor, namely concentration = 1-3 wt%, voltage = 15-23 kV, nozzle-collector distance = 10-25 cm, and feed rate = 0.03-0.0875 ml/h. The smallest nanoparticles had an average size of around 40 nm. Results showed that lowering the solution concentration and feed rate, as well as increasing the nozzle-collector distance and applied voltage led to a decrease in the average size of the electrosprayed cellulose nanoparticles. Fourier transform infrared analysis proved that no chemical change had occurred in the cellulose structure after the electrospraying process. According to X-ray diffraction (XRD) results, cellulose nanoparticles showed a lower degree of crystallinity in comparison with the raw cellulose powder. XRD results also proved the absence of LiCl salt in the electrosprayed nanoparticles.
本研究通过静电纺丝纤维素在二甲基乙酰胺/氯化锂溶剂中的溶液，制备了纤维素纳米粒子，并研究了静电纺丝条件和分子量对电纺纳米粒子平均粒径的影响。纤维素的静电纺丝在以下范围内进行，每个因素的范围分别为浓度=1-3wt%、电压=15-23kV、喷嘴-收集器距离=10-25cm 和进料速率=0.03-0.0875ml/h。最小的纳米粒子平均粒径约为 40nm。结果表明，降低溶液浓度和进料速率，以及增加喷嘴-收集器距离和施加电压，都会导致电纺纤维素纳米粒子的平均粒径减小。傅里叶变换红外分析证明，纤维素结构在静电纺丝过程后没有发生化学变化。根据 X 射线衍射（XRD）结果，与原纤维素粉末相比，纤维素纳米粒子的结晶度较低。XRD 结果还证明了电纺纳米粒子中不存在 LiCl 盐。
