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首页> 外文期刊>Journal of Applied Polymer Science >Poly(vinyl alcohol)-based polymeric membrane: Preparation and tensile properties
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Poly(vinyl alcohol)-based polymeric membrane: Preparation and tensile properties

机译：聚乙烯醇基聚合物膜：制备和拉伸性能

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摘要

A series of poly(vinyl alcohol) (PVA)-based single-layer organic polymeric membranes were prepared via the crosslinking of PVA with different amounts of formaldehyde. Meanwhile, for comparison, both a three-layer organic polymeric membrane and a hybrid composite membrane were also prepared by the layer-upon-layer method. Their thermal stability and tensile properties were investigated to examine the effect of crosslinking on the membrane performances. Thermogravimetric analysis and differential scanning calorimetry thermal analyses showed that the thermal degradation temperature of the single-layer crosslinked membrane C reached up to 325°C. Tensile testing indicated that the three-layer organic polymeric membrane E had excellent tensile strength among these single-layer and three-layer membranes. The swelling properties revealed that the swelling degree value of these membranes decreased with an increase in methanol concentration; this suggests that they were not easily swollen by the methanol solution, which is meaningful for the separation of organic mixtures. Field emission scanning electron microscopy images exhibited that the crosslinking of functional groups impacted their structures and confirmed that their mechanical properties were related to their structures. These findings suggest that the crosslinking of functional groups is an effective method for adjusting the tensile strength of PVA-based organic polymeric membranes and related hybrid composite membranes.
机译：通过PVA与不同量甲醛的交联，制备了一系列基于聚乙烯醇（PVA）的单层有机聚合物膜。同时，为了比较，还通过层上层方法制备了三层有机聚合物膜和杂化复合膜。研究了它们的热稳定性和拉伸性能，以检验交联对膜性能的影响。热重分析和差示扫描量热法热分析表明，单层交联膜C的热降解温度达到325℃。拉伸试验表明，在这些单层和三层膜中，三层有机聚合物膜E具有优异的拉伸强度。溶胀特性表明，这些膜的溶胀度值随甲醇浓度的增加而降低;这表明它们不容易被甲醇溶液溶胀，这对于分离有机混合物很有意义。场发射扫描电子显微镜图像显示，官能团的交联会影响其结构，并证实其机械性能与其结构有关。这些发现表明，官能团的交联是用于调节基于PVA的有机聚合物膜和相关的杂化复合膜的拉伸强度的有效方法。

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