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首页> 美国卫生研究院文献>Polymers >Effect of Saponification Condition on the Morphology and Diameter of the Electrospun Poly(vinyl acetate) Nanofibers for the Fabrication of Poly(vinyl alcohol) Nanofiber Mats
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Effect of Saponification Condition on the Morphology and Diameter of the Electrospun Poly(vinyl acetate) Nanofibers for the Fabrication of Poly(vinyl alcohol) Nanofiber Mats

机译：皂化条件对制备聚乙烯醇纳米纤维毡的电纺聚乙酸乙烯酯纳米纤维形态和直径的影响

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摘要

Novel poly(vinyl alcohol) (PVA) nanofiber mats were prepared for the first time through heterogeneous saponification of electrospun poly(vinyl acetate) (PVAc) nanofibers. The effect of varying the saponification conditions, including temperature, time, and concentration of the alkaline solution, on the morphology of the saponified PVA fibers were evaluated by field-emission scanning electron microscopy. At 25 °C, the saponified PVA fibers exhibited a broad diameter distribution. The average fiber diameter, however, was found to decrease with increasing saponification temperature. When the saponification time was increased from 6 to 30 h, the average fiber diameter decreased gradually from 1540 to 1060 nm. In addition, the fiber diameter and morphology were also affected by the concentration of the alkaline saponification solution. The most optimal conditions for fabrication of thin, uniform, and smooth PVA nanofibers corresponded to an alkaline solution containing 10 g each of NaOH, Na2SO4, and methanol per 100 g of water, a temperature of 25 °C, and a saponification time of 24 h.
机译：通过电纺聚醋酸乙烯酯（PVAc）纳米纤维的异质皂化作用，首次制备了新型聚乙烯醇（PVA）纳米纤维垫。通过场发射扫描电子显微镜评估了改变皂化条件（包括温度，时间和碱性溶液的浓度）对皂化PVA纤维形态的影响。在25°C下，皂化的PVA纤维显示出较宽的直径分布。然而，发现平均纤维直径随着皂化温度的升高而减小。当皂化时间从6小时增加到30小时时，平均纤维直径从1540 nm逐渐减小到1060 nm。另外，碱性皂化溶液的浓度也影响纤维的直径和形态。制造薄，均匀和光滑的PVA纳米纤维的最佳条件对应于每100克水含有25克NaOH，Na2SO4和甲醇的碱性溶液，温度为25°C，皂化时间为24 H。

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