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首页> 外文期刊>Journal of Applied Polymer Science >Electrospinning of Poly(vinyl pyrrolidone): Effects of Solvents on Electrospinnability for the Fabrication of Poly(p-phenylene vinylene) and TiO2 Nanofibers
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Electrospinning of Poly(vinyl pyrrolidone): Effects of Solvents on Electrospinnability for the Fabrication of Poly(p-phenylene vinylene) and TiO2 Nanofibers

机译：聚乙烯吡咯烷酮的静电纺丝：溶剂对制备聚对亚苯基亚乙烯基和TiO2纳米纤维的静电纺丝性的影响

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Seven different solvents (methanol, ethanol, 2-propanol, 1,2-dichloroethane, water, chloroform, and dichloromethane) were used to prepare electrospun poly (vinyl pyrrolidone) (PVP) fibers. The dielectric constant, viscosity, and surface tension of the solvents essentially affected the electrospinnability, morphological appearance, and size of the as-spun fibers. Small and uniform as-spun fibers could be fabricated from PVP solutions in solvents with a significantly high dielectric constant, low surface tension, and low viscosity. In three alcohol solutions (e.g., methanol, ethanol, and 2-propanol), the diameters of as-spun PVP fibers decreased with the dielectric constant, dipole moment, and density of the solvents increasing and with the viscosity of the solvents decreasing. Among these solvents, methanol was the best solvent, providing fibers with an optimal morphological appearance and a small fiber diameter. Mixing an unspinnable solvent with a solvent with a high dielectric constant, low surface tension, and low viscosity could increase the electrospinnability of the solution. The effects of solution properties and spinning conditions on the morphological appearance and diameter of electrospun PVP fibers were also carefully investigated. Under all investigated conditions for the electrospinning of a PVP solution in ethanol, the average diameters of the as-spun fibers ranged from 200 nm to 1.5 mu m. Well-aligned PVP fibers were also produced with a rotating-drum collector technique. Lastly, PVP was used in the fabrication of poly[2-methoxy-5-(2'-ethythexyloxy)-1,4-phenylene-vinylene] and TiO2 fibers by acting as a polymer carrier or guide.
机译：七种不同的溶剂（甲醇，乙醇，2-丙醇，1,2-二氯乙烷，水，氯仿和二氯甲烷）用于制备静电纺丝聚乙烯吡咯烷酮（PVP）纤维。溶剂的介电常数，粘度和表面张力在本质上影响着电纺丝性，形态外观和初纺纤维的尺寸。小而均匀的初纺纤维可以由PVP溶液在溶剂中制成，该溶液具有极高的介电常数，低表面张力和低粘度。在三种醇溶液（例如，甲醇，乙醇和2-丙醇）中，初纺PVP纤维的直径随着介电常数，偶极矩和溶剂密度的增加以及溶剂粘度的降低而减小。在这些溶剂中，甲醇是最好的溶剂，使纤维具有最佳的形态外观和较小的纤维直径。将不可纺溶剂与具有高介电常数，低表面张力和低粘度的溶剂混合可以增加溶液的电纺性。还仔细研究了溶液性质和纺丝条件对电纺PVP纤维形态和直径的影响。在将聚乙烯吡咯烷酮溶液在乙醇中进行电纺的所有研究条件下，初纺纤维的平均直径为200 nm至1.5μm。还使用旋转鼓收集器技术生产了排列良好的PVP纤维。最后，PVP通过充当聚合物载体或导向剂，用于制造聚[2-甲氧基-5-（2'-乙氧基）-1,4-亚苯基-亚乙烯基]和TiO2纤维。

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