Solutions of poly(ethylene-co-vinyl alcohol) or EVOH, ranging in composition from 56 to 71 wt% vinyl alcohol, can be readily electrospun at room temperature from solutions in 70% 2-propanol/water (rubbing alcohol). The solutions are prepared at 80 degrees C and allowed to cool to room temperature. Interestingly, the solutions are not stable at room temperature and eventually the polymer precipitates after several hours. However, prior to precipitation, electrospinning is extensive and rapid, allowing coverage of fibers on various substrates, including a grounded metal plate, dielectrics interposed between the charged jet and the metal ground, and on the human body. Fiber diameters of ca. 0.2-8.0 microm were obtained depending upon the solution concentration, an attractive range for tissue engineering, wound healing, and related applications. Electrospun EVOH mats have been shown to support the culturing of smooth muscle cells and fibroblasts.

译文

:聚乙烯(乙烯-共-乙烯醇)或EVOH溶液的组成范围为56至71 wt%的乙烯醇,在室温下可以很容易地从70%2-丙醇/水(摩擦醇)溶液中进行电纺丝。在80℃下制备溶液,并使其冷却至室温。有趣的是,溶液在室温下不稳定,最终聚合物在数小时后沉淀。然而,在沉淀之前,静电纺丝是广泛且快速的,从而允许将纤维覆盖在各种基底上,包括接地的金属板,介于带电射流和金属基底之间以及人体上的电介质。纤维直径约根据溶液浓度,组织工程,伤口愈合和相关应用的吸引范围而获得0.2-8.0微米。静电纺丝EVOH垫已被证明可以支持平滑肌细胞和成纤维细胞的培养。

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