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Role of rheology on the formation of Nanofibers from pectin and polyethylene oxide blends

机译:流变学对果胶和聚环氧乙烷共混物形成纳米纤维的作用

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Characterizing the parameters critical to the prediction of a successful electrospinning process from solution properties is essential, yet, not easy in the case of biopolymers. In this study, we attempted to present a broad perspective by simultaneously evaluating the effect of eight different parameters, namely zero shear viscosity, tip viscosity, elastic modulus, phase angle, cohesive energy, pH, conductivity, and surface tension, on the formation of smooth pectin nanofibers. Our results showed that (1) the viscosity of the solution is not an indication of jet formation, but once the jet is formed, high zero shear viscosity and high tip viscosity are required to maintain a dominant whipping instability for smooth nanofiber formation and (2) while evaluating the elasticity of the spinning solutions, comparing only the elastic modulus values would be misleading, since low phase angle values are also necessary for pectin solutions to be electrospun into nonbeaded fibers. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48294.
机译:表征对从溶液特性预测成功静电纺丝过程至关重要的参数是必要的,但在生物聚合物的情况下并不容易。在这项研究中,我们试图通过同时评估八种不同参数的效果,即零剪切粘度,尖端粘度,弹性模量,相角,粘性能量,pH,导电性和表面张力的影响来呈现广泛的视角。光滑果胶纳米纤维。我们的研究结果表明,(1)溶液的粘度不是喷射形成的指示,但一旦形成射流,需要高零剪切粘度和高尖端粘度,以保持较大纳米纤维形成的显性次次不稳定(2 )在评估纺丝溶液的弹性的同时,仅比较弹性模量值将是误导性的,因为果胶溶液也需要低相角值,以便将电纺成非合格纤维。 (c)2019 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019,136,48294。

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