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Effect of different solvent systems on PHBV/PEO electrospun fibers

机译：不同溶剂体系对PHBV / PEO电纺纤维的影响

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The selection of non-hazardous solvent systems is an important factor that can significantly influence fiber formation during polymer electrospinning. In this paper, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/polyethylene oxide (PEO) has been electrospun using different solvent systems to investigate the influence of different solution properties on nanofiber morphology and diameter, the thermal and mechanical properties, as well as the degradation kinetics of the electrospun fibers. The morphology, thermal and mechanical properties of PHBV/PEO electrospun fibers were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TG) and differential scanning calorimetry (DSC), and a universal testing machine, respectively. The results showed that the binary-solvent system (dichloromethane/ethanol DCM/EtOH) gave the finest defect-free fibers, and exhibited the best thermal and mechanical properties of all the single solvents (chloroform (CHL), dichloromethane (DCM)). Therefore, the effect of DCM/EtOH in different ratios on PHBV/PEO electrospun fibers was studied in detail. In brief, the DCM/EtOH solvent system was considered to be the best candidate for PHBV/PEO for electrospinning.
机译：选择非危险性溶剂系统是一个重要因素，可以显着影响聚合物静电纺丝过程中纤维的形成。在本文中，已使用不同的溶剂系统对聚3-羟基丁酸酯- co <​​/ em> -3-羟基戊酸酯（PHBV）/聚环氧乙烷（PEO）进行了电纺丝，以研究不同溶液性质对纳米纤维形态的影响直径，热和机械性能以及电纺纤维的降解动力学。分别使用扫描电子显微镜（SEM），热重分析（TG）和差示扫描量热法（DSC）和通用测试仪对PHBV / PEO电纺纤维的形貌，热性能和机械性能进行了表征。结果表明，二元溶剂体系（二氯甲烷/乙醇DCM / EtOH）提供了最细的无缺陷纤维，并且在所有单一溶剂（氯仿（CHL），二氯甲烷（DCM））中均表现出最佳的热性能和机械性能。因此，详细研究了不同比例的DCM / EtOH对PHBV / PEO电纺纤维的影响。简而言之，DCM / EtOH溶剂系统被认为是用于静电纺丝的PHBV / PEO的最佳选择。

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