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首页> 外文期刊>Journal of Applied Polymer Science >Fibrous Membranes of Cellulose Acetate and Poly(vinyl pyrrolidone) by Electrospinning Method: Preparation and Characterization
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Fibrous Membranes of Cellulose Acetate and Poly(vinyl pyrrolidone) by Electrospinning Method: Preparation and Characterization

机译：静电纺丝法制备醋酸纤维素和聚乙烯吡咯烷酮的纤维膜

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摘要

Fibrous membranes of cellulose acetate (CA), poly(vinyl pyrrolidone) (PVP) and composite membranes of these polymers, were obtained by the electrospinning method. Using systematic method, the optimal conditions for preparation of fibrous membranes were found. Both CA and PVP a concentration of 8% weight was found. The CA was dissolved in a acetone:- water solution, volume ratio 80 : 20 and the PVP is dissolved in ethanol:water solution, ratio volume 85 : 15. The flow rate for both polymers was 1.5 mL h(-1). The same applied voltage value and the distance between the needle and collection plate were for polymer both, 15 kV and 15 cm respectively. The morphology of fibrous membranes and composite membranes were evaluated by scanning electron microscopy (SEM). The CA fibers showed ribon morphology, while the PVP fibers were cilindric, in both cases with diameters in the micrometer range. Thermogravimetric analysis showed that CA had a complete degradation to 445 degrees C, while the fibrous membranes PVP required a value of temperature for degradation of up to 571 degrees C. Fibrous composite membrane PVP/CA/PVP shows a higher value of strain at break (%), and a lower value of tensile strength (MPa) compared to CA/PVP/CA.
机译：通过静电纺丝法获得了醋酸纤维素（CA），聚乙烯吡咯烷酮（PVP）的纤维膜和这些聚合物的复合膜。利用系统的方法，找到了制备纤维膜的最佳条件。发现CA和PVP的浓度均为8重量％。将CA溶解在丙酮：水溶液中，体积比为80∶20，并且将PVP溶解在乙醇：水溶液中，体积比为85∶15。两种聚合物的流速为1.5mL h（-1）。对于聚合物，相同的施加电压值和针与收集板之间的距离分别为15 kV和15 cm。通过扫描电子显微镜（SEM）评价纤维膜和复合膜的形态。在两种情况下，CA纤维均表现出核子形态，而PVP纤维呈纤毛状，且直径均在微米范围内。热重分析表明，CA可以完全降解至445摄氏度，而纤维膜PVP则需要一个高达571摄氏度的降解温度值。纤维复合膜PVP / CA / PVP的断裂应变值更高（与CA / PVP / CA相比，拉伸强度（MPa）更低。

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