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Thermomechanical and structural characterization of polybutadiene/poly(ethylene oxide)/CNT stretchable electrospun fibrous membranes
Polymers for Advanced Technologies ( IF 3.1 ) Pub Date : 2020-09-07 , DOI: 10.1002/pat.5080
Remzi Gürbüz 1 , Baran Sarac 2 , Viktor Soprunyuk 2, 3 , Eray Yüce 2, 4 , Jürgen Eckert 2, 4 , Ali Ozcan 1 , A. Sezai Sarac 5
Affiliation  

It is difficult to produce rubbery polymer nanofibers, that is, polybutadiene, by the method of electrospinning, since during electrospinning rubbery polymer fibers join and entangles due to their low Tg. For this reason, it is not easy to achieve the fiber form out of these polymers. Homogeneously electrospun carbon nanotubes (CNT)‐filled polybutadiene (PBu) and poly(ethylene oxide) (PEO) composite elastomeric fibers exhibit distinctive physical features such as uniform fiber diameter and distribution with significant improvements in thermomechanical properties. Controlled hydrophilicity/hydrophobicity with the components allows to generate homogenous, thermally stable and stretchable bio‐composite scaffold, and fibrous antibacterial membrane scaffolds out of PBu/PEO/CNT composite. We have combined the exciting properties of PEO with high pore density with the rubber elasticity of PBu via dissolving them in a dichloromethane/ethyl acetate organic solvent, and subsequently producing electrospun woven fibers with different PBu/PEO ratios. Frequency‐dependent thermomechanical characterization via dynamic mechanical analysis reveals pronounced changes in the onset and extent of melting, as well as the storage and loss modulus values at the onset of melting, in particular when small amounts (1.25% by wt%) of CNTs are present. The characteristic bands were detected for the PBu/PEO and PBu/PEO/CNT samples by means of Raman and Fourier‐transform infrared spectroscopy. CNT addition increases the hydrophobicity via the increase in roughness as attained by atomic force microscopy.

中文翻译:

聚丁二烯/聚环氧乙烷/ CNT可拉伸电纺纤维膜的热力学和结构表征

通过静电纺丝的方法难以生产橡胶状聚合物纳米纤维,即聚丁二烯,因为在静电纺丝过程中,橡胶状聚合物纤维由于其低T g而接合和缠结。。因此,由这些聚合物难以形成纤维形式。均质电纺丝碳纳米管(CNT)填充的聚丁二烯(PBu)和聚环氧乙烷(PEO)复合弹性纤维具有独特的物理特征,例如均匀的纤维直径和分布,并显着改善了热机械性能。通过控制组分的亲水性/疏水性,可以生成均质,热稳定且可拉伸的生物复合支架,以及由PBu / PEO / CNT复合材料制成的纤维状抗菌膜支架。我们将高孔隙密度的PEO的令人兴奋的特性与PBu的橡胶弹性相结合,方法是将它们溶解在二氯甲烷/乙酸乙酯有机溶剂中,然后生产出具有不同PBu / PEO比的电纺纤维。通过动态力学分析进行的随频率变化的热力学特征揭示了熔化开始和熔化程度的显着变化,以及熔化开始时的储能模量和损耗模量值,特别是当少量(1.25%wt%)的CNT当下。通过拉曼光谱和傅立叶变换红外光谱法检测了PBu / PEO和PBu / PEO / CNT样品的特征谱带。CNT的添加通过原子力显微镜所获得的粗糙度的增加来增加疏水性。通过拉曼光谱和傅立叶变换红外光谱法检测了PBu / PEO和PBu / PEO / CNT样品的特征谱带。CNT的添加通过原子力显微镜所获得的粗糙度的增加来增加疏水性。通过拉曼光谱和傅立叶变换红外光谱法检测了PBu / PEO和PBu / PEO / CNT样品的特征谱带。CNT的添加通过原子力显微镜所获得的粗糙度的增加来增加疏水性。
更新日期:2020-09-07
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