当前位置: X-MOL 学术J. Appl. Polym. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Large amplitude oscillatory shear (LAOS) measurements as a promising tool to predict electrospinnability of pectin solutions
Journal of Applied Polymer Science ( IF 3 ) Pub Date : 2021-09-12 , DOI: 10.1002/app.51652
Duygu Ozmen 1 , Busra Akinalan Balik 2 , Sanem Argin 2 , Cigdem Yildirim‐Mavis 3 , Omer Said Toker 1
Affiliation  

The response of the polymer solution to % strain is critical since the polymer solution is drawn by the electrical field during electrospinning process. To date, all studies relating electrospinning to rheological parameters have been conducted in the linear region where small strain values are applied to the polymer solutions. This is the first study attempting to correlate the behavior of the solutions in the nonlinear region with smooth nanofiber formation. For this aim, fiber forming solutions were prepared with pectin at different concentrations (3%, 4%, 5%, and 6%) and PEO with different molecular weights (600, 1000, and 2000 kDa). Deformation was applied in the range of 0.05% and 500% and normalized Lissajous curves were obtained. Both elastic and viscous curves confirmed one another, suggesting a profound contribution of PEO 2000 to the elasticity of the polymer solution at all pectin concentrations even at large strain values. This finding might explain why smooth fibers can only be achieved with PEO 2000 while only beaded fibers were formed with PEO 600 and PEO 1000. The results suggest that LAOS measurements might be used as a promising tool to predict whether a polymer solution can be electrospun into smooth nanofibers.

中文翻译:

大振幅振荡剪切 (LAOS) 测量作为预测果胶溶液静电纺丝性的有前途的工具

聚合物溶液对应变百分比的响应至关重要,因为聚合物溶液在静电纺丝过程中被电场拉动。迄今为止,所有将静电纺丝与流变参数相关的研究都是在线性区域中进行的,在该区域中将小应变值应用于聚合物溶液。这是第一项尝试将非线性区域中解的行为与平滑纳米纤维形成相关联的研究。为此,使用不同浓度(3%、4%、5% 和 6%)的果胶和不同分子量(600、1000 和 2000 kDa)的 PEO 制备纤维形成溶液。在 0.05% 和 500% 的范围内应用变形并获得归一化的 Lissajous 曲线。弹性曲线和粘性曲线相互印证,表明 PEO 的重要贡献2000至聚合物溶液在所有果胶浓度下的弹性,即使在大应变值下也是如此。这一发现可能解释了为什么只有 PEO 2000才能获得光滑的纤维,而 PEO 600和 PEO 1000只能形成珠状纤维。结果表明,LAOS 测量可能被用作预测聚合物溶液是否可以电纺成光滑纳米纤维的有前途的工具。
更新日期:2021-11-08
down
wechat
bug