聚（乙烯醇）、聚（乙烯醇）/硼酸和聚（乙烯醇）纳米复合材料与氨基官能化和原始埃洛石纳米管薄膜结合的物理机械性能,Journal of Applied Polymer Science

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聚（乙烯醇）、聚（乙烯醇）/硼酸和聚（乙烯醇）纳米复合材料与氨基官能化和原始埃洛石纳米管薄膜结合的物理机械性能
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-21 , DOI: 10.1002/app.51424
Kourosh Sayar Dogahe ₁ , Somaye Akbari ₁ , Mohammad Haghighat Kish ₁

Affiliation

通过溶液浇铸技术制备了环保型聚乙烯醇 (PVA)、PVA/硼酸、PVA/埃洛石纳米管 (HNTs) 和 PVA/氨基功能化 HNTs (APTES-HNTs) 薄膜。通过傅里叶变换红外光谱、X 射线衍射、差示扫描量热法、扫描电子显微镜和能量色散光谱对样品进行表征。表征结果证明了 PVA 与不同添加剂之间的化学和物理相互作用。通过DMA和蠕变分析评估薄膜的粘弹性行为。储能模量、损耗因子以及α _α和β _β受 APTES-HNT 影响的转变作为潜在填料形成有效的交联。APTES-HNT 的存在增强了超出预期的蠕变恢复。测量拉伸和冲击强度以了解样品的机械稳定性。PVA/APTES-HNTs 和 PVA/硼酸在弹性极限后表现出更多的屈服行为。此外，与纯 PVA 和 PVA/HNT 相比，随后的断裂和冲击强度显着增加。粘弹性和力学行为通过Tanδ下的面积相互关联曲线和断裂功和冲击强度，它们的线性相关系数在 95% 置信限下具有统计显着性。似乎 APTES-HNT 的存在提供了新的交联，从而改变（改善）了 PVA 的物理机械性能，提供了一种适合进一步应用的生物纳米复合材料。从文献中，对这些观察提供了可能的解释。

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Physico-mechanical properties of poly (vinyl alcohol), poly (vinyl alcohol)/boric acid, and poly (vinyl alcohol) nanocomposites incorporated with amino-functionalized and pristine halloysite nanotubes films

Eco-friendly poly(vinyl alcohol) (PVA), PVA/boric acid, PVA/halloysite nanotubes (HNTs), and PVA/amino-functionalized HNTs (APTES-HNTs) films were fabricated by a solution casting technique. The samples were characterized by fourier transform infrared, X-ray diffraction, differential scanning calorimetry, scanning electron microscope, and energy-dispersive spectroscopy. The characterization results proved the chemical and physical interactions between the PVA and different additives. The viscoelastic behavior of the films was evaluated by DMA and creep analysis. The storage modulus, loss factor, and both α_α and β_β transitions affected by APTES-HNTs as a potential filler to form effective cross-links. APTES-HNTs existence enhanced creep-recovery beyond expectations. Tensile and impact strength were measured to understand samples' mechanical stability. PVA/APTES-HNTs and PVA/boric acid showed more yield behavior after the elastic limit. Furthermore, the subsequent rupture and impact strength were increased significantly compared with neat PVA and PVA/HNTs. The viscoelastic and mechanical behaviors were linked to each other by the area under Tanδ curve and the work of rupture and impact strength, which their linear correlation coefficient is statistically significant at 95% confidence limits. It seems that the presence of APTES-HNTs provides new cross-links, which altered (improved) the physico-mechanical properties of PVA, offering a bionanocomposite suitable for further applications. From the literature, possible explanations are provided for these observations.

更新日期：2021-09-23

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